3-Heights™ PDF Optimization Service, User Manual
Contents
1. ee eene nnne nnn nnn 39 PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 4 of 40 July 3 2015 6 1 The Output File Is Still Too Large cece cece cece e eect eect men 39 6 2 The Output File Is Larger Than the Input File eeseseeseeenee 39 6 3 The Selected Compression Type is Not Applied eseeseeeeesee 40 6 4 The Output Document Is Not Encrypted ssseseeseeeen nennen 40 PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 5 of 40 July 3 2015 1 Introduction 1 1 Description The 3 Heights PDF Optimization Service optimizes PDF files to enable their use as high resolution files for printing or with less resolution for electronic document exchange or space saving document archiving Many processes produce very large PDF files that are not suitable for electronic document exchange Users are then tempted to convert the PDF documents into other formats but this only makes the situation even worse The correct approach and the easiest is to optimize large PDF documents This process optimizes fonts and images to the best possible size and quality It also removes redundant document content and linearizes PDF documents to enable fast web display PDF Optimizer PDF PDF S m vi 2 Print o a R x d G H H goj m Jk ENTER TE cc c Oo c2. different from JPEG and JPEG2000 then the compression of the input image is also executed As a result several candidate versions are obtained Now a choice is made among all these versions and the original image based on the size in bytes The smallest candidate is chosen and used in the output document Example The following command performs MRC optimization for color and grayscale images fcu If the result takes more memory than the original image in the input document then the original image is used See also Mixed Raster Content MRC Optimization for Images Force Compression Conversion If set images are always recompressed If not set default images are only recompressed if the resulting image is smaller than the original i e occupies less bytes to store in the file Set the Compression Types for Indexed Paletted Images This affects only images with an indexed color space This type of color space is sometimes used for color graphics and logos The switch fc is followed by a comma separated list of numerical values no spaces allowed in the list The following values are possible Table Indexed Compression Types Parameter Compression Filter 0 RAW data 2 default Flate ZIP compression 3 Lempel Ziv Welch LZW compression 10 Take the compression type from the original image in the input PDF Example To let the 3 Heights PDF Optimization Service try Flate compression and LZW compre
3. TOOLS COM Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 User Manual Contact pdfsupport pdf tools com Owner PDF Tools AG Kasernenstrasse 1 8184 Bachenb lach Switzerland http www pdf tools com Copyright 2000 2015 3 Heights PDF Optimization Service Version 4 5 Page 2 of 40 July 3 2015 Table of Contents 1 Introduction zzauanunnanunnannnnanunnanannanannanunnanannanannanannanannanannanunnanannanannanen 5 1 1 Description sarah ce qa ee Sant etie cox eri me r c PA HERR RA 5 1 2 cEUFICUOTIS serons eer p Ue ue itr Ui Eon ee Et ETE Ea 5 Features coiere i VE EA Er EEE ner 6 Formats He Ei ade EEE ate bh RER 6 Compliance ER 7 MEC au DEUS 7 1 4 Operating Systems un ke 7 2 Installation uuuuanunnanannannnnanunnanannanannanannanannanannanannanannanannanannanannanannanen 8 2 1 YOVEPVIEW aiii eise EY PLID I RIESE ERG V pie Y Vai VR Pli Cu ER 8 2 2 Installing the Service eec nen ann nenn anna enun 8 2 3 Editing the Configuration File pdfoptimizesvr ini eceeeeeee eee ee eee ee ee ees 9 Retrieve Information about Available Options sssssssssssrrssnrrserrnserrnurrnnuerrnsernns 9 2 4 Creating Starting and Running the Service esses 10 2 5 Error Log iFilessnns re EEE 12 2 6 State Diagram of the Service nee een 13 3 License Management nuunuanannanannanannanannanannanannnnannanannnnannanannanannanannunn 14 3 1
4. P allow printing low resolution PDF Tools AG Premium PDF Technology 0 u 3 Heights PDF Optimization Service Version 4 5 Page 25 of 40 July 3 2015 m allow changing the document c allow content copying or extraction o allow commenting allow filling of form fields s allow content extraction for accessibility allow document assembly d allow high quality printing Egi default allow everything all permissions are granted 0 allow nothing no permissions are granted The following command sets the owner password to owner and the permission flags to allow printing in low resolution and allow form filling o owner p pf Note that high quality printing requires the low resolution printing flag to be set as well o owner p pd For further information about the permission flags see PDF Reference Manual section 3 5 2 Read an Encrypted PDF File When the input PDF document is encrypted and has a user password set the password to open the PDF either the user or the owner password must be provided to open the document If for example the user password is userpwd then the command would look like this pw userpwd When a PDF is encrypted with a user password and no password is not provided or it is incorrect the document cannot be process Instead it will generate an error message in the log file and move the file to the folder Failed Set the Owner Password The owner pa
5. e HKCU Software PDF Tools AG for the current user 4 Optimization Process The main intent of the 3 Heights PDF Optimization Tool is to reduce the file size of a PDF document and optimize it for a specific field of application e g Internet Printing etc For that purpose it offers various options to optimize embedded resources such as fonts or images 4 1 Images Relevant Factors for the File Size The size of an image is basically determined by four factors 1 The pixel mass The total amount of pixels the image has An image with a size of 600 by 800 pixels has 480000 pixels total 2 The color depth How many bits are required to describe 1 pixel The table below gives the answer for different types of images For example an RGB image with 600 by 800 pixels requires therefore 600 x 800 x 3 bytes 1 44 Mbytes in uncompressed format Color Description Bits pixel Space Bi tonal Black and white 1 Indexed Colors are stored in an index table which usually 2 8 holds 2 to 256 entries e g GIF Grayscale Monochrome 8 Color RGB Color using Red Green Blue 24 Color CMYK Color using Cyan Magenta Yellow Key black 32 3 The compression type A compression algorithm can compress data such as an image to reduce its file size Such an algorithm belongs to either of the following two classes PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 16 of 40 July 3
6. m 3 gt 2 agang 41 u oy amp 1 2 Functions The use of the latest compression algorithms enables the tool to reduce the memory space requirements for images or lessen their resolution remove redundant and alternative information optimize fonts through summarization or subsetting convert colors and linearize the PDF PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 6 of 40 July 3 2015 Features Optimization for Electronic Document Exchange Web Publishing and Archiving Customized compression of bi tonal monochrome and color images Define image resolution in dots per inch Define threshold value for down sampling Set the quality index of lossy compression Automatically select best compression type for images Perform mixed raster content MRC optimization for images Remove invisible parts of images Linearization fast web display Compile and subset fonts Read encrypted input files Encrypt and set access authorization for the output file Process memory resident files Removal of o Redundant objects o Obsolete objects stemming from previous changes to the file o Embedded standard fonts e g Courier Arial Times o Embedded non symbolic fonts o Unnecessary file information o Article threads o Alternative images o Metadata o Page piece information o Document structure tree including markup o Miniature page preview images o Spider web capture information Remove
7. Images MRC Optimization In contrast to the values 0 7 this is not a single compression format Instead this enables MRC optimization on color and monochrome images See Mixed Raster Content MRC Optimization for Images Application area Scanned documents Compression of the Source Image In contrast to the values 0 7 this is not a single compression format Instead this tells 3 Heights PDF Optimization Service to use the same compression as the original input image Set the Color Conversion This switch allows for converting raster images from one color space into another E g it allows for converting all RGB images to CMYK images This switch does not have any impact on objects other than raster images that use color spaces such as vector graphics or text Color key masked images are not color converted Pre blended images can be converted from RGB to Grayscale if the force conversion feature is set PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 28 of 40 July 3 2015 Use the switch c followed by one of the parameters in the table listed below Table Color Conversion Parameter Conversion Color values 0 default Don t convert colors 1 Convert to ICE sRGB colors red green blue 2 Convert to CYMK color using profiles cyan yellow magenta key 3 Convert color images to grey scale grey Example To convert all embedded color images that use the
8. Pause Service This option pauses the service pdfoptimizesvr a Continue Service This option resumes the service pdfoptimizesvr o Stop Service To stop the service use the option t pdfoptimizesvr t If stop if called while the service is running the current job all pages will be finished after that the service is stopped If the service was paused before calling stop the current page while be finished processing After that page the job is aborted PDF Tools AG Premium PDF Technology q X 3 Heights PDF Optimization Service Version 4 5 Page 22 of 40 July 3 2015 Delete Service The optimization service can be deleted with the option d pdfoptimizesvr d Query Current Status of Service This option returns the current status of the service pdfoptimizesvr q The service starts automatically during system startup The service is stopped PdfOptimizeSvr QueryService The operation completed successfully List Options for the Configuration File This options lists all available options to configure the service pdfoptimizesvr i Run as Executable With this option the optimization service runs as an executable instead of as a Windows Service It provides the same functionality as long as the exe is running pdfoptimizesvr x PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 23 of 40 July 3 2015 5 2 File a
9. that actual photographic regions present in the input image are not recognized correctly This can happen for example if a photographic region contains parts with uniform color For the cut out images a compression type can be set Note The resulting cut pictures are neither down sampled nor color converted This first phase is optional and can be switched off Phase 2 Separation into Layers For this second phase the image is not supposed to contain any photographic features Instead the image is assumed to consist of text and graphic potentially with varying color Now the whole image is separated into two layers a foreground and a background layer Additionally a mask is created which can be thought of as a bi tonal image that is not displayed directly but tells for each pixel whether to show the foreground layer or the background layer Example Let the image consist of a yellow background with black paragraph text and a title text in red Then the resulting background layer contains the yellow color only The foreground layer contains the black text color where the paragraph text is located and the red text color where the title is located In the mask pixels for which the foreground layer should be displayed are set to 1 the others are set to O I e the mask contains 1 s where the black and the red text is and 0 s everywhere else In the resulting PDF the foreground layer the background layer and the mask are
10. Applied 1 Not all compression types can be applied to all types of images Check the tables Table Bi tonal Compression Types Table Color Monochrome Compression Types and Table Indexed Compression Types 2 The optimization is only applied if it reduces the files size therefore an image cannot be re compressed with a new compression that uses more disc space than the original compression This behavior can however be switched off with ff 6 4 The Output Document Is Not Encrypted In order to encrypt the output document set an owner password using the switch o and permission flags using the switch p Example to set the owner password to mypassword and do not grant any permissions o mypassword p 0 It is not possible to inherit the owner or user password or the permission flags from the input document PDF Tools AG Premium PDF Technology
11. E EXER 26 Compression Values for Images sssssssssssesseseess nnnn en namen nn nenn nenn 26 C Set the Color Conversion cc cece cece eee eee eee eee eaten mene eene 27 cff Compress Typel fonts convert tO CFF cccccecceeeeeeeeeeeeeeeeeeeeeeneeneeneaes 28 cms Set the color management engine userensenennnnennnnnn nennen nenne nun nennen nen 28 Set the Resolution and Threshold per Image TyP eceeeeeeeeeeeeeeeeeeeeeaeees 28 dr Set the Resolution In DPI een ee ee ones 29 dt Set the Threshold in DPI 4s4 s4srennnnen nenn nenn nenn nennen nun nennen nennen 29 fb Set the Compression Types for Bi tonal Images zs4 s4ran nenn nennen nn 29 fc Set the Compression Types for Color and Grayscale Images 30 ff Force Compression Conversion zeenenseneenennennennnnnnnnnnnnnnnnnnnnnnennennen nennen nenn 31 fi Set the Compression Types for Indexed Paletted Images 31 fv Set the Minimum PDF Version euasserensenennnnnnnnnnn nennen nen nenn nennen nennen 32 id Set Value in the Document Information Dictionary uusennennnnnennennen nennen 32 isc Enable Conservative Image Processing Strategy 4s4 n4Hran nn anne een 32 m Merge Embedded Font Programs ceceeeee nenn nennen nennen nenn nennen nen 32 ml Set Compression Type for MRC Layers unuserensenennnnennnnnn nenn nennen nennen 33 mlr Set the Resolution in DPI for MRC
12. Graphical License Manager Tool u u444 nHHnanennan nn ann nun eases eats ne enn 14 List all installed license keySs 24 u4erannennnnnnnn en une nun nn nn men 14 Add and delete license keys u2suasnnnnnnnnnnnnnnen nenne nun nun nun nun nun nun nun nun nun nun nnn nn 14 Display the properties of a license sus urerannnnnnnnnnn eee nn mmm 14 Select between different license keys for a single product sssssus 15 3 12 Platform considerations eic eee enc een LH 15 Windows iecore tux ax ul ERR nana Bali hex Kl 15 4 Optimization Process auunuanannnnannnnannnnannanannanannnnannanannanannanannanannanannanen 15 4 1 Images dette tatis en Saas desuper be AR LR Med 15 Relevant Factors for the File Size csssssssssssssesseen mmm 15 Exa M Plese g pe e EP 16 Optimizing Raster Images sussusannnnnnnnnnnnnnnnnnnnnnn nun nun nun nun nun nun nun nun nun nun nenn 16 Mixed Raster Content MRC Optimization for Images urs4 nreran en eset tees 17 4 2 Optimize Fonts ne ee e e HR Ri 19 4 3 Suggested Settings for the Web ssssssssssssrrssrrrsrnrrsrrrrnrrrunernnnrnrnnrrnnnennns 19 4 4 Suggested Settings for Printing ssssssssssssrrssnrrsrnrrsrrrrsrnnusernnnrrnnnrrrnnernns 20 5 Reference Manual uususanannanannanannanannnnannanannnnannanannnnannanannanannanannunannunn 21 5 1 Service Control Commands u u eene LE 21 C Creale dei Ip c r 21 S Start SER
13. Layers essensenennnnnnnnnnnnnnn nennen nennen nenn 33 mlq Set the Image Quality for MRC Layers esssssssseemmee 33 mm Set Compression Type for the MRC Mask seesssem me 33 mp Set Compression Type for MRC Cut Out Pictures sessseeeeeesese 33 0 Set the Owner PaSSWOrdisisiiieriiaii eiiiai Ma aia iaa adaa 33 SOG Clip IMAGES eiaa bed a eren n na aa Reg ve da ben de no En ER du ale oh dd bs 34 od Optimize Resources eec eye exe Ure REX RR A a Eae e ERE EPI EE KE 34 ol kin arize Only ii en ea en ea nr 34 or Remove Redundant Objects z44 n4nnennnnnn nenn nennen nennen nennen nennen 34 ow Linearize the Output Files cos ansehe ER AR ken 34 p Set the Permission Flasi tsrs aaa agaaa adai 34 pw Read an Encrypted PDF File cceceeeee eee eee e eee eee teens eens eats ea eaii 35 q Set the Compression Quality zeressenennnnennnnnnnnnnn teens teens nennen nenne nennen 35 rs Remove Embedded Standard Fonts cceceeeeeeee ects nese nesta eeeeaeeeeaeaes 36 S Subset F nts ern E EX RO TELE irren 36 Strip the File ned Leere 36 u Set User PasSWOFd seien een nenn nenn DE REPE ur dun 37 5 4 1 SErVvice Settings 2 s 0 EE 37 Autodelete Successfully Processed Files ccscceceeeeee none nennen nn nun nun nn nennen nennen 37 Job Number Prefix iac allerhand alix 37 feodi ER 38 Polling Interval an ee IR x d e a n tees 38 Tips Tricks and Troubleshooting
14. of the jpeg images with the quality option q In many cases using a lossy compression is not significant for viewing q 60 3 Verify what image compression algorithms are applied the smallest file sizes are usually achieved using JPEG or JPX for grey scale and color images and JBIG2 for bi tonal images When using JPEG the quality should be at least 75 when using JPX it can be set as low as 25 fc 8 fm 8 fb 7 q 30 For fonts 4 Apply subsetting to fonts This means all glyphs of characters that are unused are removed from the font S 5 Remove non symbolic embedded fonts Keep in mind that the appearance when rendering a PDF document with non embedded non PDF Standard Fonts is unpredictable ES s m 6 2 The Output File Is Larger Than the Input File 1 The 3 Heights PDF Optimization Service also repairs corrupt documents to a certain extent This means if relevant data is missing it is recovered This could possibly lead to a larger file size 2 If linearization is applied there is information added to the document This information contains hints for the browser plug in and allows it to specifically download only those objects relevant for displaying a certain page The linearization information can increase the file size by about 1 to 10 PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 40 of 40 July 3 2015 6 3 The Selected Compression Type is Not
15. password c conv Color conversion Default 8 dt dpi Threshold in DPI to selectively activate resampling Default 225 Off 1 gt dr dpi Resolution in DPI after resampling Default 158 dhltir dpi DPIs for hbitonal images dn tir dpi DPIs for monochrome images delt ir dpi DPIs for color images fb conpr Bitonal compression Default 6 fm conpr Monochrome compression Default 1 gt fc compr Color compression Default 1 gt q quality Set compression quality for lossy compression methods default 75 Fonts rs Remove embedded standard fonts s Subset fonts Objects od Optimize resources or Remove redundant objects m Linearize Coptimize for fast web viewing sa Strip article threads sm Strip meta data Strip page piece info private application data Strip document structure tree incl markup Strip thumbnails Strip spider web capture gt info Don t compress Raw DCT lt JPEG gt compression Flate ZIP compression LZU lt Lempel Ziv Welch gt compression CCITT Fax Group 3 compression CCITT Fax Group 3 2D compression CCITT Fax Group 4 compression JBIG2 compression JPEG2868 compression Don t convert colors Convert to ICE sRGB colors Convert to CMYK colors using profiles Convert to color images to gray scale Successful completion Couldn t open input file Couldn t create output file Invalid option or option value Linearization failed Compression Conversion A UN hM S CO ND S CO S
16. sampling set the threshold value set it to 1 dt 1 If the size in terms of bytes of the re sampled image is larger than its original size the original image is kept instead Set the Compression Types for Bi tonal Images This option affects only bi tonal black and white images The switch b is followed by a comma separated list of numerical values no spaces allowed in the list The following values are possible Table Bi tonal Compression Types Parameter Compression Filter 0 RAW data 2 Flate ZIP compression PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 30 of 40 July 3 2015 3 Lempel Ziv Welch LZW compression 4 CCITT Fax Group 3 compression 5 CCITT Fax Group 3 2D compression 6 default CCITT Fax Group 4 compression 4 JBIG2 compression 10 Take the compression type from the original image in the input PDF Example To let the 3 Heights PDF Optimization Service try CCITT Group 3 compression JBIG2 compression and the compression that is used in the source image of the original file use the following command fb 3 7 10 The above command makes the 3 Heights PDF Optimization Service go through all bi tonal images and processes each image individually as follows All the given compression algorithms are executed If the input image has a compression different from CCITT Fax Group 3 and JBIG2 then the compression of the input ima
17. stored as three images and thus are allowed to have different resolution and different PDF Tools AG Premium PDF Technology 4 2 3 Heights PDF Optimization Service Version 4 5 Page 19 of 40 July 3 2015 compression types Since all the detailed features have been moved to the mask it makes sense to down sample the foreground and background layers and use a low image quality The mask on the other hand is usually stored with a lossless compression type optimized for text Phase 3 Reconstruction In this phase the results of phase 1 the cut out images and phase 2 the layers and the mask are used to synthesize the desired result If in phase 1 a single photographic region covering the entire image is detected then the original image is used and the reconstruction is finished Otherwise the reconstruction first places the background layer followed by the foreground layer with the mask Finally if any cut images are found they are placed at their respective locations on top of the foreground layer Optimize Fonts 4 3 Every text in a PDF document is written with a font This font can either be embedded or not embedded in the resources of the PDF Embedded means a font program is embedded that describes how glyphs are drawn If a font is not embedded the application rendering the PDF e g 3 Heights PDF Viewer or Adobe Acrobat have to select a replacement font Therefore the visual appearance of text written
18. 17 of 40 July 3 2015 2 3 4 loose visual quality every time they are newly compressed On top of that the compressed output can be larger than the input because artifacts introduced by the previous compression s are now considered as part of the image which needs to be compressed and lead to a worse compression even when the resolution is reduced Per default the 3 Heights PDF Optimization Tool will however prevent such unnecessary re sampling The color depth can be modified for color images The color depth can be left unchanged set to Grayscale 8 bit RGB 24 bit or CMYK 32 bit It cannot be changed to black and white 1 bit Note that in certain circumstances the color depth of the image is not converted e g if the resulting file size increases or if the image is pre blended with a matte color The compression can be setup independently for the following three image compression types Type Description Bi tonal Black and white images Indexed Images with an indexed also known as paletted color space Continuous Color RGB and CMYK images and grayscale images Bi tonal images usually contain text or black and white graphics indexed images usually contain color graphics such as logos while continuous images usually contain photographs For each of the above image types several compression algorithms can be set The 3 Heights PDF Optimization Tool tries all the given compression a
19. 2015 a Lossless The original image can be restored exactly b Lossy The compression modifies the pixels The original image cannot be restored from the compressed version This is typically applied to photographic images where the human eye cannot distinguish whether the image was modified The most common lossy compression is JPEG The benefit of lossy compression is the higher compression ratio See also chapter Supported image compression types 4 The content of the image The simpler the image the better it compresses For most compression algorithms a simple image e g completely white compresses much better than a complex image e g a photo Examples CCITT Fax compression was designed to compress black text written on a white background The algorithm was optimized under the assumption that a page contains more white pixels than black pixels Therefore a bi tonal image with a lot of black does generally not compress as well as in image with more white even if they have the same pixel mass JBIG2 compression searches for patterns and uses them multiple times For example in a scanned text document the same few dozen of characters are used over and over again The algorithm is optimized to save frequent patterns more efficiently than rare ones Optimizing Raster Images The 3 Heights PDF Optimization Tool offers the following possibilities to optimize images 1 The pixel mass can be reduced It cannot be inc
20. 40 July 3 2015 MRC optimization is a way of breaking such images down into parts such that each part is well suited for one type of a compression algorithm With this approach the resulting file size often can be reduced without significantly reducing the visual quality of the document Note MRC optimization can only be enabled for continuous images i e not for bi tonal images and images with an indexed color space MRC optimization may yield unexpected results e g because the input image is not suitable for MRC As another example images in the original PDF may be stored as small slices and MRC optimization fails because the 3 Heights PDF Optimization Tool has no option to concatenate such image slices A PDF that contains MRC optimized images is not suited for optical character recognition OCR and image extraction In the 3 Heights PDF Optimization Tool MRC optimization works in three phases as explained below Phase 1 Cutting out Pictures In this phase the input image is analyzed and rectangular areas containing photographic features are detected Each detected region is cut out and placed as a separate image in the resulting PDF Depending on the input image it is possible that this phase decides that the whole input image consists of one photographic region covering the whole image In this case the second phase Phase 2 Separation into Layers is omitted On the other hand it is possible
21. J OS C1 CO 02 I 2 2 4 Creating Starting and Running the Service Once the configuration file is completed the PDF Optimization Service can be controlled via the command line To create or delete the service administrator permissions are required 1 To create the service use the option c This function will automatically search for the executable path PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 11 of 40 July 3 2015 Command Prompt G gt pdfoptimizesvr c The executables path D bin bin pdfoptimizeSur exe CPdfOptimizeSuvr CreateService The operation completed successfully G gt Important It is essential that PdfOptimizerSvr exe be on a non mapped drive After executing this command the service is created It is now visible in the Computer Management window under Services To open the Computer Management window go to Start gt Control Panel gt Administrative Tools gt Computer Management or simply right click the icon My Computer on the desktop and select manage When the service is created it will appear as 3 Heights TM PDF Optimization Service as shown in the image below ini xl adim ww e gt ilm ERSTEN gt E Il Tree By NET Runtime Optimization Serv Computer Management Local E System Tools 3 Heights TM PDF Optimization Optimize PDF fil
22. RGB color space to images of the CMYK color space use the following command CE cff Compress Type1 fonts convert to CFF Convert embedded Type1 PostScript fonts to Type1C Compact Font Format This reduces the file size cms Set the color management engine Set the Color Management System CMS Engine used for color conversion option c Supported engines are e None No CMS is applied This results in the maximum possible contrast e Neugebauer The Neugebauer algorithm efficiently converts CMYK to RGB It does not need any color profiles The results however look similar to conversion using color profiles e MSICM The Microsoft ICM Engine e iIcms default Use ICC color profiles default profiles are used for all unmanaged device color spaces eFileName Providing a file name a configurable version of the Neugebauer algorithm is applied The coefficients can be defined in the text file The Neugebauer algorithm mixes the colors based on the amount of color and the corresponding weighted coefficient Altering the values for a pure color specifically changes the result for this pure color The color transition remains smoothly Set the Resolution and Threshold per Image Type The target resolution values can be set individually for different types of images using the following switches followed by a numerical parameter default 150 dbr DPI for bi tonal images dcr DPI for color images dmr DPI for monoch
23. The following information is part of the event DeleteService The operation completed successfully Polling Interval The polling interval defines the time in milliseconds that the polling thread pauses between two polls The time passing until the same watched folder is polled again maximum pick up time is The value of PollingInterval plus the actual time it takes to poll all watched folders The higher the polling interval the lower the network traffic and the longer it takes until documents are picked up Suggested values for the polling intervals are 1000 to 10000 milliseconds PdfOptimizeSvr PollingInterval 5000 PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 39 of 40 July 3 2015 6 Tips Tricks and Troubleshooting 6 1 The Output File Is Still Too Large First and foremost it is important to understand what kind of content there is in the document There is no point in trying to optimizing fonts when the document contains scanned images only Document properties such as embedded fonts and images can be listed using the corresponding listing functions li If General optimization Remove redundant objects and optimize resources using rs od can always be set For images 1 Try setting a lower threshold and a lower dpi for the images e g rescale all images with a dpi greater than 72 dpi to 50 dpi dt 72 dr 50 2 You could also try reducing the quality
24. VICE a RERUM 21 a PAUSE Service PER e ER 21 0 Gontinue SeErViCE Areals an per xt RR Ix a en RE nuin 21 t SOP SEVICE a dde rex id RA une En u LE MIAERTIK MISERE IERI ERI KRUE PEE 21 d Delete Service iiu ee e DU DET DIE vea de 22 q Query Current Status of Service uesauseranennanennanennan en name namen nn nennen 22 i List Options for the Configuration File zur urHrannnnan nn nn nn ann namen ann 22 X Run as EXecutable seame a kn 22 5 2 File and Falder Optlorisu iso ien trinh ea a ne age 23 PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 3 of 40 July 3 2015 6 Configuration File PdfOptimizeSvr ini esses meme 23 Ik Set License Key nun nun meneame neas sea sea nea nn nn 23 w Setthe Watched Folder eee pn 24 wd Set the Drop In Folder sessssssssssssesememenmen menn enne 24 wfs Process only files with certain extenSionS s s sssssssrssrrresrrnrsrrnrerrnrerrnene 24 wfi Ignore files with certain extensions us sssrennnnennnnnn nennen nennen nennen 24 ZWEI lt PEMD END ie 24 p Set the Permission Flags 2a allg 24 pw Read an Encrypted PDF File zu sssrensnnennn nenne nenne nenne nen nennen nenne nennen 25 0 Set the Owner Password zs sasnennnnennnnnn nenn nenn nennen nun nennen nenne nennen 25 u Set the User Password sa ann anna 25 5 3 Optimization OPtiOns eoe ec En ERES E ERE EP
25. as the input file but the extension txt The log file is available in the sub folder Logs Additionally a entry in the log file of the thread is created To stop the service use the option t To restart use s again 4 To delete the service stop it first then use the option d to delete 2 5 Error Log Files There are two types of error log files 1 The log file per thread Each thread watched folder has a log file The log file is locked by the service as long as the service is running e The log file contains general messages such as Service thread for directory c PdfOptimizeSvr started Thread for directory c PdfOptimizeSvr terminated e Error messages such as Error 0 while opening file c PdfOptimizeSvr Jobs Job 01C5EE97 6F2667EC document pdf The for each document which could not be processed there is an error log file created The log file is written to the folder Log and has the same file name as PDF Tools AG Premium PDF Technology 2 6 3 Heights PDF Optimization Service Version 4 5 Page 13 of 40 July 3 2015 the input document with extension txt There is no error log available if a document cannot be opened e g is not a PDF document State Diagram of the Service The 3 Heights PDF Optimization Service behaves as described in the state diagram below If Stop if called when the service is in the state Paused the current job is aborted This means the curr
26. cludes the 21 characters of the job ticket If a file name exceeds this value its file name is truncated at the end of the file name and before the file extension It is therefore suggested that watched folder names are kept reasonably short Set the Drop In Folder By default the drop in folder is equal to the folder defined as watched folder using the option w If the input files should be taken from a different folder this can be configured using wd All folders created by service including the output folder are at the directory defined by w wd C SomePath DropIn Process only files with certain extensions By default the service tries to process all files dropped into the drop in folder regardless of the extension With this option the processing can be restricted to a set of known file extension Example Restrict the processing to JPEG and PNG files wfs jpeg jpg png Ignore files with certain extensions By default the service tries to process all files dropped into the drop in folder regardless of the extension With this option files with certain file extensions ca be ignored Example Ignore temporary files wfi temp tmp Set the Permission Flags This option sets the permission flags It is only usable in combination with encrypted documents By default no permissions are granted The permissions that can be granted are listed in Table Permission Flags Table Permission Flags Parameter Description
27. contains color images to which JPEG2000 compression is applied the output file will be version 1 5 Otherwise it will be version 1 4 Set Value in the Document Information Dictionary Set the value of an info entry key Examples for keys are Author Subject Title Producer or custom attributes Example Set the title id Title My Title Enable Conservative Image Processing Strategy If set then the different compression types given with fb fc and fi are omitted if the current image is neither clipped nor color converted nor down sampled Thus the original image in the input document is conserved if it has not been altered Merge Embedded Font Programs Font programs can be merged if they originate from the same font e g they are of the same type have the same name and encoding Merging of Typei PostScript and TrueType fonts is supported PDF Tools AG Premium PDF Technology mir miq mm 0 3 Heights PDF Optimization Service Version 4 5 Page 33 of 40 July 3 2015 Set Compression Type for MRC Layers This option affects only MRC foreground and background layers The option is followed by a single numerical value indicating the compression type to use for MRC foreground and background layers For possible values see Table Color Monochrome Compression Types in the description of fc The default is 1 JPEG compression See also Mixed Raster Content MRC Optimization for Ima
28. e default is 75 For images compressions that support lossless compression JPEG2000 and JBIG a value PDF Tools AG Premium PDF Technology S sf 3 Heights PDF Optimization Service Version 4 5 Page 36 of 40 July 3 2015 of 100 corresponds to lossless compression any other value represents lossy compression JBIG2 only supports values that are multiples of 10 10 20 100 Example The following command sets the quality index to 50 All images types which support the quality parameter are recompressed with this quality index q 50 Remove Embedded Standard Fonts This option removes all embedded standard fonts and replaces them with one of the 14 PDF Standard Fonts The following font families are removed Arial CourierNewPS Times ZapfDingbats Courier Helvetica TimesNewRoman CourierNew Symbol TimesNewRomanPS and their derivatives they are different for different font families such as Arial Bold Arial Bold Arial Italic ArialMT Arial BoldItalic Arial BoldItalic Arial BoldMT Courier Bold Arial Italic Arial BoldItalicMT Arial ItalicMT Courier Oblique A PDF Viewer must be able to display standard fonts correctly even if they are not embedded Therefore using this option should not visually alter the PDF when it is displayed Un embedding a font decreases the file size Un embedding the font works based on the font s Unicode information I e the un embedded font s characters are mapped to those of th
29. e original font with the same Unicode Therefore only fonts with Unicode information will be un embedded by the 3 Heights PDF Optimizer However if a font s Unicode information is not correct un embedding may lead to visual differences Whether or not a font s Unicode information is correct can be verified by extracting text that uses the font Suitable tools for this purpose are for instance the 3 Heights PDF Extract Tool or an interactive PDF viewer If the extracted text is meaningful the font s Unicode information is correct and un embedding of the font will not lead to visual differences Subset Fonts Embedded fonts can be subsetted Subsetting refers to only storing those character glyphs of the font that are actually used Unused character glyphs are removed The advantage is that the file size can be reduced this way in particular for Asian fonts The downside is that if text is to be edited only the characters of the subsetted font can be used Strip the File Remove parts of the PDF file The following parts of a PDF can be stripped Strip article threads Strip and flatten form fields and annotations This removes interactive features of the PDF PDF Tools AG Premium PDF Technology u 5 4 3 Heights PDF Optimization Service Version 4 5 Page 37 of 40 July 3 2015 Strip alternate images variant representations of the base image Strip meta data Strip page piece info private application da
30. ent MRC Optimization for Images Set the Owner Password The owner password is required to change the security settings of the document In order to apply permission flags an owner password must be set Permission flags are set with the switch p Example Encrypt a document and set the owner password to owner o mypassword PDF Tools AG Premium PDF Technology od P 3 Heights PDF Optimization Service Version 4 5 Page 34 of 40 July 3 2015 Clip Images Images in PDF documents can be clipped This means that only part of the image is visible whilst the rest is hidden The switch oc detects these images reduces their size the area that is actually displayed and replaces the original image by the reduced image Pre blended images are not clipped Setting oc activates the od option Optimize Resources Optimize the resources of the PDF such as images color spaces or fonts If set unused resources are removed Also content streams are re built Linearize Only Do not apply any optimizations but linearize the file This can be significantly faster than the option ow See ow for more information Remove Redundant Objects This option removes redundant objects I e it identifies duplicates of objects and merges them Linearize the Output File Add so called linearization tags to the document A linearized document has a slightly larger file size than a non linearized file and provides
31. ent page is finished processing then the job is terminated If Stop is called when the service is the state Running the current job all pages is finished Then the service is stopped Create Stop Abort Start Stop Delete Resume Unknown Running lt Paused Cy Pause Restart Restart Stop Start Abort Start Stop Delete Delete Marked for Delete PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 14 of 40 July 3 2015 3 License Management For services there is only one possibility to pass the license key to the application The license key is installed using the GUI tool Graphical user interface This is the easiest way if the licenses are managed manually 3 1 Graphical License Manager Tool The GUI tool LicenseManager exe is located in the bin directory of the product kit amp PDF Tools License Ma File Edit Help x G5 Add Key Delete Refresh List All Users Curent User License Properties 3 Heights TM Document Converter E Name Value V 7 0 10A0M EEE Key 0 J0A94 SE IU T 7 M 0 BCA5N VTI BZHOTZEO A FREI Product 3 Heights TM Image 3 Heights TM Image to PDF Converter API af Intended Use Productive V v 0 J0A94 Minis um oil ian a ahaa Y Platform Windows 3 Heights TM Image to PDF Converter Service Volume ated Paget em 0 1CA0 XTCRL TFI OMIT TC BER v Expiration
32. es o Started Automatic o em Storage Ss adobe LM Service Adobe LM Service Manual Localsystem Bg Services and Applications Ky AdobeVersionCue Manual LocalSystem H E Telephony a Alerter Notifies selected users and computers Started Automatic LocalSystem 9 Microsoft SQL Servers Sa Application Management Provides software installation services Manual LocalSystem Bl SQL Server Configuration Manager Sia ASP NET State Service Provides support For out of process s Manual ASPNET WMI Control Bs Automatic Updates Enables the download and installation Started Automatic LocalSystem Sy Services Bs Background Intelligent Transfer Service Transfers files in the background using Manual LocalSystem H E Indexing Service a ClipBook Supports ClipBook Viewer which allow Manual LocalSystem B Internet Information Services Ky COM Event System Provides automatic d distribution of eve Started Manual LocalSystem xl __ Provides aut 1 By default the user is set to LocalSystem After the service is created the user can be changed This will be required in a situation where a network share is used as a watched folder and the process needs to run under a user with the appropriate permission rights since the account LocalSystem does not have any permissions on remote systems 2 After it is created and the logon settings are adjusted as required the service can be started with the option s The path can be omitted if the pdfoptimizesvr
33. exe is included in the environment variable Path c Command Prompt i G gt pdfoptimizesyur s PdfOptimizeSur StartService The operation completed successfully Once the 3 Heights PDF Optimization Service is started a series of watched folders and sub folders corresponding to the configuration file pafoptimize ini is created PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 12 of 40 July 3 2015 g My Computer re m 314 Floppy A Local Disk C En Documents and Settings Inetpub im PdrOptimizeSvr PrintOptimize WebOptimize i C Failed InProgress Jobs 9 Logs Optimized i Succeeded Program Files Temp PDF documents can now be copied or drag and dropped into the watched folder PrintOptimize and WebOptimize From there it will be added a 16 byte time stamp prefix and moved to the folder Jobs A file that is currently being processed is moved from Jobs to InProgress Successfully optimized output files are available in the folder Optimized If AutoDelete is set to False in the configuration file the successfully processed input file is copied to the folder Succeeded if set to True it is deleted 1 E Documents that cannot be processed are always moved to the folder Failed An error log text file is created for failed documents This log has the same name
34. ge is also executed As a result several candidate versions are obtained Now a choice is made among all these versions and the original image based on the size in bytes The smallest candidate is chosen and used in the output document Set the Compression Types for Color and Grayscale Images This option affects normal color images RGB and CMYK as well as grayscale monochrome images The switch c is followed by a comma separated list of numerical values no spaces allowed in the list The following values are possible Table Color Monochrome Compression Types Parameter Compression Filter 0 RAW data default DCT JPEG compression 1 2 Flate ZIP compression 8 JPEG2000 compression 9 Perform MRC optimization See Mixed Raster Content MRC Optimization for Images 10 Take the compression type from the original image in the input PDF Example To let the 3 Heights PDF Optimization Shell try JPEG compression JPEG2000 compression and the compression that is used in the source image of the original file use the following command x il B The above command makes the 3 Heights PDF Optimization Service go through all color and grayscale images and processes each image individually as follows All the given compression algorithms are executed If the input image has a compression PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 31 of 40 July 3 2015
35. ges Set the Resolution in DPI for MRC Layers This option affects only MRC foreground and background layers The option is followed by a numerical value that indicates the target resolution in DPI of MRC layers after down sampling The default is 70 See also Mixed Raster Content MRC Optimization for Images Set the Image Quality for MRC Layers This option affects only MRC foreground and background layers The option is followed by a numerical value between 0 and 100 to be used as the image quality for MRC foreground and background layers when using a lossy compression for these layers The default is 10 See also Mixed Raster Content MRC Optimization for Images Set Compression Type for the MRC Mask This option affects only MRC masks The option is followed by a single numerical value indicating the compression type to use for MRC masks For possible values see Table Bi tonal Compression Types in the description of fb The default is 6 CCITT Fax Group 4 compression See also Mixed Raster Content MRC Optimization for Images Set Compression Type for MRC Cut Out Pictures This option affects only cut out images when doing MRC optimization The option is followed by a single numerical value indicating the compression type to use for MRC cut out pictures For possible values see Table Color Monochrome Compression Types in the description of fc The default is 1 JPEG compression See also Mixed Raster Cont
36. h Lossless Color depth 2 8 Application area Grey scale images artificial images CCITT Fax Group 3 Compression 1 dimensional version of the CCITT Group 3 Huffman encoding algorithm Compression Low Lossless Color depth 1 Application area Line art image bi tonal faxes CCITT Fax Group 3 2D Compression 2 dimensional version of the CCITT Group 3 Huffman encoding algorithm PDF Tools AG Premium PDF Technology 10 C 3 Heights PDF Optimization Service Version 4 5 Page 27 of 40 July 3 2015 Compression Medium Lossless Color depth 1 Application area Line art image bi tonal faxes CCITT Fax Group 4 Compression An advanced version of a bi tonal algorithm based on the CCITT Fax Group 3 2D compression Compression Medium Lossless Color depth 1 Application area Line art image bi tonal faxes JBIG2 Compression JBIG2 is an image compression standard for bi level images developed by the Joint Bi level Image Experts Group It is suitable for both lossless and lossy compression Compression High Lossless Q 100 Lossy Color depth 1 Application area Line art image bi tonal JPEG2000 Compression JPEG 2000 is a wavelet based image compression standard It was created by the Joint Photographic Experts Group committee with the intention of superseding their original discrete cosine transform based JPEG standard Compression High Lossless Q 100 Lossy Color depth 8 24 Application area
37. h allows for viewing random pages without download the entire file PDF Tools AG Premium PDF Technology 4 4 3 Heights PDF Optimization Service Version 4 5 July 3 2015 Page 20 of 40 Suggested settings c 1 fb 6 7 fc 1 8 oc od or ow s m rs Optionally information can be stripped to further minimize the file size sa si sm ss ss st sw If encrypting o lt ownerpassword gt p pf Suggested Settings for Printing Suggested settings e 2 dt 1 d or s m Optionally information can be stripped to further minimize the file size sa sf sm ss ss st sw If encrypting o lt ownerpassword gt p pd PDF Tools AG Premium PDF Technology 5 1 3 Heights PDF Optimization Service Version 4 5 Page 21 of 40 July 3 2015 Reference Manual Service Control Commands C S 0 These options are used to control the service The create and delete functions require administrator rights The start and stop functions require operator rights Create Service The optimization service is created using the option c The default user of the service is the LocalSystem The user can be changed as long as the service is not started C pdf tools bin pdfoptimizesvr c Important It is essential that pdfoptimizesvr exe be on a non mapped drive Start Service Once created the optimization service can be started with the option s pdfoptimizesvr s
38. lgorithms and takes the one that yields the smallest file size Note that the more compression algorithms are set the longer the process of optimizing images will take Furthermore a more conservative image processing strategy can be enabled This strategy prevents all the compression trials if the image has neither been clipped nor down sampled nor undergone a color conversion Hence if the image has not been altered then the original image from the input document is taken The content of the image cannot be changed directly However changing the resolution or applying a lossy compression algorithm modifies the content of the image Note Unless forcing of re compression is enabled the 3 Heights PDF Optimization Tool never increases the file size of an image because it chooses the smallest among all tried compression algorithms and the original image in the input file This means the 3 Heights PDF Optimization Tool cannot be used to un compress embedded images Mixed Raster Content MRC Optimization for Images Some raster images typically scanned documents consist mainly of text possibly in several colors and interspersed with some pictures Such images are difficult to compress with one single compression type because of the diverse or even conflicting features of different parts of the image PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 18 of
39. ls AG Premium PDF Technology 2 1 3 Heights PDF Optimization Service Version 4 5 Page 8 of 40 July 3 2015 Installation Overview 2 2 The PDF Optimization Service is configured by the file pafoptimizesvr ini which needs to be located in the same directory as the executable pdfoptimizesvr exe Before starting the service the configuration file needs to be adjusted How this is done is described in the chapter Editing the Configuration File pdfoptimizesvr ini Once configured the service can be created started paused continued stopped and deleted via the command line To use the create and delete functions administrator permissions are required To start and stop the service operator permissions are required When the service is running it processes PDF documents that are copied or moved into watched folders They are then renamed and moved to the folder Jobs The renaming gives the PDF a 16 character long timestamp to create unique job tickets Installing the Service The retail version of the 3 Heights PDF Optimization Service comes as a ZIP archive containing various files including runtime binary executable code documentation and license terms 1 Download the ZIP archive of the product from your download account at www pdf tools com Open the ZIP archive Check the appropriate option to preserve file paths folder names and unzip the archive to a local folder e g C program files pdf tool
40. n quotation marks e g w C program files optimize for web c 1 dt 120 sets the options for this watched folder Retrieve Information about Available Options Open a shell and type PdfOptimizeSvr without parameters This lists the usage displaying all available service related options as shown in the image below e Command Prompt C gt pdfoptimizesur 3 Heights lt TM gt PDF Optimization Service Version 1 6 0 3 of Nov 15 2887 pdfoptimizesvr options c Create service specify fully qualified path gt m Delete service stop and close services window first s Start service t Stop service a Pause service o Continue service m Query current status of service i Configuration ini gt file options usage PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 10 of 40 July 3 2015 Use the option i to get a list of all available configuration options G gt pdfoptimizesvr 3 Heights lt IM gt PDF Optimization Service Version 1 6 8 48 of Nov 19 2007 Usage of PdfOptimizeSvr ini configuration file file PdfOptimizeSur l AutoDelete False i True AutoDeleteAll False i True Threads n Threadi1 options Threadn options options u dir Set root directory wd dir Drop directory default root directory pu password Password to open input file Default none o owner Set the owner password p flags Set the permission flags see below u user Set the user
41. named and added a 21 character prefix containing a time stamp Job 8 digits 8 digits Something like Job 01C61DD4 E72bE1BCE The job number prefix ensures the same document same name can be processed multiple times PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 38 of 40 July 3 2015 Adding the prefix can be prevented with the following line in the configuration file PdfOptimizeSvr JobPrefix False Logpath Log messages created by the service are by default written to the sub directory og To alter the directory add a line similar as shown below to the configuration file PdfOptimizeSvr LogPath C path log Messages created by the service can be added to the system s application event log instead of written to a log file This is achieved by adding the following line to the configuration file PdfOptimizeSvr LogPath EventLog The system s application log event will then log messages similar as shown below e CreateService The operation completed successfully e StartService The operation completed successfully Note that the messages are only fully accessible while the service is created Otherwise a message as shown below is displayed e The description for Event ID 1 in Source PdfOptimizeSvr cannot be found The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer
42. nd Folder Options Configuration File PdfOptimizeSvr ini The configuration file defines the setting for the watched folders It is read upon starting the service PdfOptimizeSvr required Autodelete optional true or false AutodeleteAll optional true Or false LogPath optional if used must be a path like C mypath log or the keyword EventLog PollingInterval optional value in milliseconds default 1000 JobPrefix optional true or false Threads n required Threadl w required Thread2 w Threadn There must be exact as many threads as defined in Threads n Example PdfOptimizeSvr Autodelete true LogPath EventLog JobPrefix false Threads 2 Threadi w C WebOptimize c 1 dt 120 dr 96 q 75 od or ow ss st Thread2 w C PrintOptimize dt 1500 dr 1200 od or Iik Set License Key Pass a license key to the application at runtime instead of installing it on the system PDF Tools AG Premium PDF Technology TW wfs wfi P 3 Heights PDF Optimization Service Version 4 5 Page 24 of 40 July 3 2015 Set the Watched Folder Use the option w to define the path of the watched folder This path should not contain mapped drives since other users such as LocalSystem do not recognize them This parameter must always be the first parameter of a thread w C PdfOptimizeSvr WebOptimize Note that the service supports path lengths including file name of up to 258 characters This in
43. ne multiple permissions concatenate them to one string Example The following sets the owner password to owner and the permission flags to allow printing in low resolution and allow form filling o owner p pf Example High quality printing requires the standard printing flag to be set too o owner p pd For further information about the permission flags see PDF Reference Manual section 3 5 2 Read an Encrypted PDF File When the input PDF file is encrypted and has a user password set the password to open the PDF the password can be provided as parameter of the switch pw Example The input PDF document is encrypted with a user password Either the user or the owner password of the input PDF is mypassword The command to process such an encrypted file is pw mypassword When a PDF is encrypted with a user password and the password is not provided or is incorrect the 3 Heights PDF Optimization Shell cannot read and process the file Instead it will generate the following error message in the log file Password wasn t correct Set the Compression Quality Set the compression quality index for lossy compression methods This option only applies to JPEG JPEG2000 and JBIG2 images A lower value results in a smaller file size but the images are of poorer visual quality A higher value results in better visual quality but also a larger file size The supported values range from 1 lowest to 100 highest Th
44. o Does not expire Y Maintainance Expiration 2033 12 31 gt LiziskkTBRA Tanana ta DECR Chall List all installed license keys The license manager always shows a list of all installed license keys in the left pane of the window This includes licenses of other PDF Tools products The user can choose among e Licenses available for all users Administrator rights are needed for modifications e Licenses available for the current user only Add and delete license keys License keys can be added or deleted with the Add Key and Delete buttons in the toolbar e The Add key button installs the license key into the currently selected list o Note Services run by default under the LOCAL SERVICE user not under the current user e The Delete button deletes the currently selected license keys Display the properties of a license If a license is selected in the license list its properties are displayed in the right pane of the window PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 15 of 40 July 3 2015 Select between different license keys for a single product More than one license key can be installed for a specific product The checkbox on the left side in the license list marks the currently active license key 3 2 Platform considerations Windows The license keys are stored in the registry e HKLM Software PDF Tools AG for all users
45. or clear form fields and annotations Optimize for Printing Color conversion to RGB CMYK or grayscale Allow high print quality Set minimum PDF version of the output file Formats Input Formats PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page 7 of 40 July 3 2015 e PDF 1 x e g PDF 1 4 PDF 1 5 Target Formats e PDF 1 x e g PDF 1 4 PDF 1 5 Compliance Standards ISO 32000 PDF 1 7 1 3 Service The 3 Heights PDF Optimizer Service is a ready to use Windows Service that allows to install a Windows NT service process to automatically optimize PDF documents from watched folders by optimizing fonts images and redundant information The PDF Optimization Service combines three programs in one executable 1 An optimization service that can be run on a Windows platforms 2000 or later The service can be created started paused resumed stopped and deleted via the Windows service control panel and reports to the application log of the Windows event log panel 2 A command line interface to control the PDF optimization service By means of this interface the service can be created started stopped and deleted etc e A query program which can be used to retrieve information about available options 1 4 Operating Systems e Windows XP Vista 7 8 8 1 32 and 64 bit e Windows Server 2003 2008 2008 R2 2012 2012 R2 32 and 64 bit PDF Too
46. reased This is done by clipping cropping the image size to its visible extent and or by reducing the image resolution The resolution defines how many pixels there are in given length of the image The most common unit for resolution is dpi Dots per inch If an image has a resolution of 200 dpi it means when displayed at 10096 zoom there are 200 pixels for 1 inch of image The higher the resolution is the sharper the image A monitor has usually a resolution of at least 96 dpi a laser printer of at least 600 dpi When the file size matters a common resolution for color and grayscale images in PDF is 150 dpi usually higher for bi tonal The process of changing the amount of pixels an image has is called re sampling or down sampling when the result has less pixels than the original image In the 3 Heights PDF Optimization Tool down sampling is applied by setting a target resolution and a threshold resolution The default values are 150 dpi for the target resolution and 225 dpi for the threshold resolution This means every image that has a resolution of 225 dpi or higher is potentially down sampled to 150 dpi Of course the threshold resolution can be set equal to the target resolution However there are many cases where down sampling by just a little bit has disadvantages In particular lossy images e g JPEG compression PDF Tools AG Premium PDF Technology 3 Heights PDF Optimization Service Version 4 5 Page
47. rome images PDF Tools AG Premium PDF Technology dbt dct dmt dt fb 3 Heights PDF Optimization Service Version 4 5 Page 29 of 40 July 3 2015 The threshold values can be set with these switches followed by a numerical parameter default 225 DPI for bi tonal images DPI for color images DPI for monochrome images Set the Resolution in DPI Set the target resolution after re sampling in dots per inch dpi Only those images with a resolution value higher than the threshold value which is set with option dt will be processed The default target resolution is 150 dpi Pre blended images images with a color key mask masks and soft mask images are not re sampled Example In order to down sample all raster images with a resolution greater than 150 dpi to 75 dpi apply the following dat 150 dr 75 Set the Threshold in DPI This switch defines the minimum resolution an image must have to be optimized The threshold value for re sampling raster images is used in conjunction with the switch dr which sets the actual target resolution for those re sampled images The threshold resolution must be equal or higher than the target resolution If the value is set to 1 re sampling is turned off The default threshold resolution is 225 dpi Example Down sample all raster images with an original resolution higher or equal to 150 dpi to a new resolution of 75 dpi zdtobt5or dre75 Example To disable re
48. s 4 The unzip process now creates the following subdirectories e Bin Contains the runtime executable binary code e Doc Contains documentation files PDF Tools AG Premium PDF Technology 2 3 3 Heights PDF Optimization Service Version 4 5 Page 9 of 40 July 3 2015 Editing the Configuration File pdfoptimizesvr ini Before starting the PDF Optimization Service for the first time the file pdfoptimizesvr ini needs to be modified Editing this file while the service is running has no impact The service first needs to be stopped and restarted after the modification When opening this file with a text editor it looks like this PdfOptimizeSvr AutoDelete True Threads 2 Threadl w C WebOptimize c 1 dt 120 dr 96 q 75 od or ow ss st Thread2 w C PrintOptimize dt 1500 dr 1200 od or The meaning is as following AutoDelete True This option automatically deletes a PDF file after it is processed When set to False successfully processed files will be copied to the subfolder Succeeded Threads 2 stands for the total amount of concurrent threads Each thread can have its own assigned settings Usually 1 thread corresponds to 1 watched folder this is not required however Threadi sets the options such as name of watched folder and settings for Thread1 w C WebOptimize sets Threadl to use this directory as watched folder If the directory has blanks in its path the entire path needs to be set i
49. ssion use the following command fi 2 3 The above command makes the 3 Heights PDF Optimization Service go through all images with indexed color space and processes each image individually as follows All the given compression algorithms are executed As a result two candidate versions are obtained Now a choice is made among these two versions and the original image based on the size in bytes The smallest candidate is chosen and used in the output document PDF Tools AG Premium PDF Technology isc m 3 Heights PDF Optimization Service Version 4 5 Page 32 of 40 July 3 2015 Set the Minimum PDF Version This option allows to set the minimum PDF version of the created PDF output file Supported values are 1 1 to 1 7 PDF 1 4 corresponds to Acrobat 5 PDF 1 5 to Acrobat 6 etc There are three parameters that influence the version of the PDF output file The value set using the option fv The PDF version of the input file Other settings in the optimization JBIG2 requires PDF 1 4 JPEG2000 requires PDF 1 5 The maximum of the three values above sets the PDF version in the output file Examples 1 Input PDF is version 1 5 and the following setting is used fv 1 4 The output file is PDF version 1 5 2 Input PDF is version 1 4 or lower and the following setting is used fv 1 4 The output file is PDF version 1 4 3 Input PDF is version 1 3 and the following setting is used fv 1 4 fc 8 If the input
50. ssword is required to change the security settings of the document o ownerpas sword Set the User Password The user password is required to open the document u userpassword PDF Tools AG Premium PDF Technology 5 3 3 Heights PDF Optimization Service Version 4 5 Page 26 of 40 July 3 2015 Optimization Options Compression Values for Images The compression value takes a number from O to 8 The supported compression algorithms are listed below No Compression Raw The raw format results in an uncompressed image There is no real benefit using Raw Compression None Color depth any DCT JPEG Compression The DCT Discrete Cosine Transformation is commonly used for image processing especially for lossy data compression Compression High Lossy Color depth 8 24 Application area Color images Flate ZIP Compression DEFLATE is a lossless data compression algorithm that uses a combination of the LZ77 algorithm and Huffman coding Compression High Lossless Color depth 8 24 Application area Images LZW Lempel Ziff Welch Compression LZW Lempel Ziv Welch is an implementation of a lossless data compression algorithm created by Abraham Lempel and Jacob Ziv It was published by Terry Welch in 1984 as an improved version of the LZ78 dictionary coding algorithm developed by Lempel and Ziv There are certain countries where this algorithm is still protected by a copyright Compression Hig
51. ta Strip document structure tree incl markup Strip embedded thumbnails Strip spider web capture info Strip everything all of the above Set User Password Set the user password of the document If a document which has a user password is opened for any purpose such as viewing printing editing either the user or the owner password must be provided Someone who knows the user password is able to open and read the document Someone who knows the owner password is able to open read and modify e g change passwords the document A PDF document can have none either or both passwords Example Encrypt a document with a user and an owner password u userpassword o ownerpassword Service Settings Autodelete Successfully Processed Files When a job has successfully been processed a new PDF document is created in the folder Optimized and the original PDF document is by default deleted In order to retain the original PDF document after successful processing set the value of Autodelete in the configuration file to False The original PDF document will then be moved from the folder Jobs to the folder Succeeded Failed documents are still moved to the folder Failed PdfOptimizeSvr AutoDelete False To delete failed documents as well use the following setting PdfOptimizeSvr AutoDeleteAll True Job Number Prefix At the time when a document is copied from the watched folder to the Jobs sub folder it is re
52. the following features among others e When a document is opened through a PDF viewing application plug in for an Internet browser the first page can be viewed without downloading the entire PDF file e When another page is requested by the user that page is displayed as quickly as possible and incrementally as data arrives without downloading the entire PDF file Note In order to make use of a linearized PDF file the PDF must reside as a file on the web server It must not be streamed Set the Permission Flags This option sets the permission flags It is only usable in combination with encrypted documents i e an owner password must be set By default all permissions are granted The permissions that can be granted are listed in the table below Table Permission Flags Parameter Description P allow printing low resolution allow changing the document PDF Tools AG Premium PDF Technology q 3 Heights PDF Optimization Service Version 4 5 Page 35 of 40 July 3 2015 c allow content copying or extraction o allow commenting allow filling of form fields s allow content extraction for accessibility allow document assembly d allow high quality printing 1 default allow everything all permissions are granted 0 allow nothing no permissions are granted The parameter 0 cannot be combined with other flags The parameter 1 is the default it cannot be set explicitly In order to combi
53. with an embedded font is determinable whereas it is not when the font is not embedded A font program can be quite large An embedded font which contains all WinAnsi characters has a size of about 20 100 Kbytes if it contains a large Unicode range e g Asian Characters it can be several Mbytes whereas an non embedded font require much less This leads to the following ways to optimize fonts 1 Remove the embedded Font Removing embedded fonts can reduce the file size of a document particularly when the document contains many fonts Removing fonts is best applied to PDF standard fonts such as Arial Courier Courier New Helvetica Times Times New Roman Removing fonts should not be applied to barcode fonts or fancy types Note PDF A requires fonts to be embedded 2 Subset Fonts Only keep the information in the font program that is required to render the characters that are actually used in text in this document All unused characters are removed 3 Merge Fonts A document can have the same font or a subset of it embedded multiple times This commonly occurs when multiple input document are merged into one large output document The 3 Heights Optimization Tool can merge these fonts into one font if they are mergable Suggested Settings for the Web When optimizing PDF files for the web the main goal is to reduce the file size without losing too much visual quality Additionally files should be linearized whic
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