ScannersHM (PC)
Contents
1. For the Save as type option make sure you change the type either to GIF gif or JPEG File Interchange Format jpg jpeg Select where you want to save your image from the Save in option and change the name of the image if you wish Click on the Save button Your image will now be formatted so it can be properly uploaded on the Web CSLP Scanners HM PC Page 10 Glossary Halftone printings A method for reproducing colour and black and white graphics using dots of ink The most obvious examples are the colour photographs in newspapers Optical Character Recognition OCR is a process of scanning printed pages as images on a flatbed scanner and then using OCR software to recognize the letters as ASCII text The OCR software has tools for both acquiring the image from a scanner and recognizing the text Optical resolutions This is the actual physical ability of the scanner to discern individual dots A 300 dpi scanner can accurately reproduce a 300 dots per inch image Scanning A process of sampling and recording the dots and colour values that make up an image The image is scanned and sampled line by line and the results are described as a bitmap file Sweet spots A scanner has a sweet spot that can provide sharper focus and therefore better detail and truer colour To test for sweet spots select a high quality image with good contrast fine detail and bright colours Transparency adapters This is an2. Prepared by Jane Costello Updated by Sandrine Ceurstemont How scanning works Scanning is a process of sampling and recording the dots and colour values that make up an image The image is scanned and sampled line by line and the results are described as a bitmap file Images are typically scanned at resolutions between 50 to 1200 Dots Per Inch dpi Bitmap files are commonly used in paint programs or image processing programs like PhotoShop or AppleWorks The most popular type of desktop scanner is the flatbed scanner so called because of its flat glass platen or bed which serves as both the scanning area and surface for laying objects down to be scanned What can be scanned Two dimensional opaque objects up to the size of a flatbed scanner 8 1 2 x 14 can be scanned in one pass Materials to be scanned include e photos e artwork e drawings e text e transparencies e newspaper clippings Note Transparent materials such as slides or negatives can be scanned with a special slide scanner or a flatbed scanner that has a transparency adapter ICT Training Updated May 2002 Contents How scanning 1 works Points to keep 2 in mind Basics of 3 scanning Scanning 4 text OCR OmniPage 5 Scanning text 7 HP ScanJet 7 Scanning an 9 image Glossary 11 Activities 12 Trainer Notes 13 CSLP Points to keep in mind before beginning
3. The following dialog will appear Manu haeto cre Stann Grater Canon Cenefeen AB iodo PRetorhep CenenP Co 3 2 Canon Cangen WeDo P Canin Cange ar Mii aa N Chie Canon Starnmner breer afp n py rola op Fl 1 ejere Flav reren rE l a walked Tha wary Aalto Sed ect Seann er Eantei I Ort 3 Select the appropriate settings through Settings Panels on the menu bar Verify the settings for the Scanner OCR Spelling Document Preferences and Direct Input features Close the dialog by clicking on the top left hand corner 4 To scan an image place the item to be scanned on the glass Be sure to place it in the correct position Click on the Scan Image button eee apr l red va M lT Tl ADF l z Ef Seni Ikl Erp Cr ardin airat i T eee Fanne Stan Optisnr wate lbh i 11 wo Cras ale pa ava deten LM do a A A y Cr ninl FE Fas rind irr An ETT Ure Pefoahs ve e e CoRR AUTO Co gan and ete Mater Dras cores unl ee cl sa ketis CSLP Scanners HM PC Page 5 CRT T2d pi Web 7T2dpi B i 180dpi BJ 360dpi Bi 72Od pi LEP 300d pi LEP 600d pi OCR 300dpi OCR 00dpi OCR 600dpi FAX 100d pi Fite 7O0dpi File 750dpi Fite 00d pi Fite 00d pi Fite 400dpi Fite 1200dpi iodiing We Image Preference ee thee ator Pheter gt AP pi 6 Choose the scan mod
4. Omnipage now knows that the image is text and will attempt to section it off and translate the contents of the scanned item into a text file 3 Verify the spelling of the text by clicking on the Proofread button on the toolbar The following dialog appears A nie of veg oa set had ce bebe a in the bop oi bein ing rd ese bp amiri ur m GAP Ir airing detours eri Eti EEI one Prati ard ntilie Cnel projet Tea cardial fom Edsall adrie reha prere hed searial be roadur n the prenet Pika ht ifm DAF pra jasli Me egg dt Frati dra ee Hire Care w ae Kiki fed a lir poies Tiis raya ote or ta Trai Dabar pepi ia EF ae ae aiy ari Ti i a ihg isis go pehin wed bo ppi y er H pirc reier to the biks ag Di IiE ae ee ee ee eee E as EP Beet ki HE Se ced eer Deere Pat fire bo fae dd thi infeed da erg cored rie ees ray Ge ected Oe ca let er for ret intar msibri Tig mi iai AESI Siha TAF Training Spro bbt Cora prier Ge eH Carparak an Pratt med wh iray Ca in aeccurt Tr Oe TS i aF eee eo OD rire OCR _ _ i __ entaina sig be Tinta ie hiipi caree hea ree er Diege be http cares http careers cs 4 Once the proofreading is complete Save the file You can also copy and paste this text file into a Word Processor and save it there HP Scan Jet Getting Started 1 Open HP Deskscan Il You can find the icon on your desktop 2 Double click on it to open the application This section 3
5. focus and therefore better detail and truer colour To test for sweet spots select a high quality image with good contrast fine detail and bright colours Scan it several times with the image on a different part of the platen each time Open all the scans in your image editor and arrange the windows so you can simultaneously view the same section of each scan CSLP Scanners HM PC Page 2 4 Set the program to scan in black and white greyscale half tone or colour depending on your needs 5 Set the resolution for the final output in dpi dots per inch If the final use of the scan will be for viewing on a monitor 72 dpi is sufficient For printing you will want to scan with a higher dpi but remember that the file will be significantly larger 6 Set the magnification for the scan It is usually indicated with a percentage 100 is the same size as the original 50 is half the size of the original 200 is twice the size of the original etc 7 Set the exposure for the scan Make adjustments in the brightness and contrast of the scan 8 Prescan the original A miniature view of whatever is on the glass will appear on screen You may want to prescan the image before you make any adjustments 9 Select the area you want to actually scan on the prescan image This is important because the prescan miniature will show everything and you might only want a portion To do so drag the handles
6. optional lid for flatbed scanners that has a light source inside usually florescent It is useful for scanning transparencies x rays etc It can be used for scanning slides as well but a slide scanner will do a vastly better job Twain supports Twain is a software interface standard developed by Hewlett Packard for interfacing scanners to productivity software The general idea is that a device with a twain driver can be used with any software that supports the Twain standard Twain support is mainly used in the Windows environment CSLP Scanners HM PC Page 11 Using the directions previously outlined in this job aid complete the following activities Save them to your account You may wish to use some of these items in the other project workshops Activity I Scan a photograph Activity 2 Scan a drawing Activity 3 Scan a page of text Helpful scanning tips The quality of your original will directly affect the quality of the digital image you can create so choose your originals carefully Think ahead to what the end use of the image will be Most crashes with graphics programs are due to insufficient memory If you are printing the image laser printers do a terrific job with 300 dpi but when inserting a file in a word processing or presentation document look for the op tion to link or publish the graphic file instead of pasting the whole file especially since 300 dpi graphic files are large Threshol
7. wish to do otherwise Make sure you change the Save in option to the location where you want to save your image Click on the Save button to save the image If you want to upload your image on to the Internet you will have to Open your image in an image editor and save it either in JPEG jpg or GIF gif formats since these are usually the only image formats that will display properly on the Web Printing an image You can print your image in this program if you want Simply choose the Print option under the File menu Using the Paint program to change the image format If you want to change the format of your image for instance to JPEG or GIF you must open your image in the Paint program The easiest way to do this is to find the scanned image document you just saved for instance if you saved your image as Ricky bmp in My Documents go to the Start menu select My Documents and then under that Ricky bmp Your image will automatically open in the Paint program Alternatively you can go to the Start menu select Programs under Programs select Accessories and then Paint Under the File menu select Open to open your image CSLP Scanners HM PC Page 9 In the Paint program you can play around with your image using the tools if you want However if you just want to change the format of your image simply go to the File menu and select Save as
8. Place the image or document you want to scan face down on relates to the HP the scanner making sure the image is aligned with the green ScanJet scanner in arrow shown the computer lab 4 Close the lid of the scanner if possible at Honore Mercier CSLP Scanners HM PC Page 7 Changing the settings All of these settings can be changed either before you scan your image or after It is usually easier to play around with the settings after you scan your image since you can see what happens to your image Image type Deskscan II allows you to choose your settings depending on the type of image you are scanning If you click on the arrow box next to the Type window you can see the options available Select the option that best fits what you are scanning Path The Path option should be set at LaserJet 5 Series for the scanner in the lab Brightness and contrast The brightness and contrast of your image can be changed by dragging the appropriate scroll bars Image size The Scaling option allows you to reduce or enlarge the image but keeping the same proportions by dragging the scroll bar As well this might be more easily done once you have finished scanning The percentages shown on top of the scroll bar express the desired size of the image in terms of the percentage of the actual image size You can see the corresponding size in pixels below the scroll bar Special effects The first three square but
9. d Specifies how many numbers of samples in an image will be sharpened A setting of O will affect every sample whereas a setting of 50 will affect almost none of the samples Highly detailed images such as line art require a setting of 3 whereas portraits look best with a setting between 5 to 9 To clean your scanner s platen a quick once over with a soft cloth paper towel or sheet of newspaper might be all it takes to remove tiny bits of dust that can be visible in a high resolution scan For fingerprints any type of glass cleaner will work but check the scanner manual first to be sure that the platen is cleanser safe
10. e from the list Orca asi Fla ee ee gnr mms Se See ae REVERE E Black amp White ED GrayScale BB Color Documents E Color Photos 7 Choose the output device from the list Note for most images 300 dpi is suitable 8 Make any adjustments to the resolution and magnification Use the tone adjustment tool to adjust the colour settings ali Reret Beves 9 Click on the Scan button to make the final scan The scanned image with all applied settings appears on the screen Save As Save in 10 Save the image in the A History desired location by PN choosin g My Documents File Save as The Save 3 dialog will a appear Favorites Web Folders i Ea E My Documents e fe A nA Ri Tools C Build March 11 i Jinterview doc J CU Net M Jane s Letter doc _JEDUC 305 M NEPquestionnaire doc English J Filmar l mmworkshop re My Pictures My Webs _ Thesis tool cai CalendarMichael doc cai Elearning Competencies doc cal evaluation Form doc cul Genty doc cal Installation doc File name Joc1 doc Save as type word Document doc Cancel CSLP Scanners HM PC Page 6 Scanning text 1 This is basically the same procedure as scanning an image However choose black and white scan mode 2 Once the scanned image appears on the screen choose Perform OCR from the toolbar
11. of the broken line that appears around your image to include only the final scan area 10 Scan the image Usually there is a button 11 If the program you are scanning with allows it you may choose to make adjustments in various exposure contrast and colour controls at this time 12 After you scan an image save it as a TIFF or PSD file You can convert it afterwards Do not throw out your original scan after the conversion If you make changes later perform the edits in the original and then convert to JPEG Resaving JPEG files removes even more data thereby keeping the file size small Points to keep in mind when scanning in colour An image has three basic colour categories highlights shadows and midtones If the portrait has a green cast correct midtones first Once you have removed the greens from the midtones you would work on the highlights and then on the shadows Be sure to check the balance of all three categories adjusting one range of colours sometimes affects the others CSLP Scanners HM PC Page 3 Scanning text What is OCR Optical Character Recognition OCR is a process of scanning printed pages as images on a flatbed scanner and then using OCR software to recognize the letters as ASCII text The OCR software has tools for both acquiring the image from a scanner and recognizing the text ideal source material for OCR OCR works best with originals or very clear copies and mono spaced f
12. onts like Courier If you have choices use the following source material e 12 point or greater font size e Black text on a white background e A clean copy not a fuzzy multi generation copy from a copy machine e Standard type font Times New Roman etc Fancy fonts may not be recognized e Single column layout OCR limitations e Using text from a source with font size less than 12 points or from a fuzzy copy will result in more errors e Except for tab stops and paragraphs marks MOST document formatting is lost during text scanning Bold Italic amp Underline are sometimes recognized e The output from a finished text scan will be a single column editable text file This text file will always require spell checking and proofreading as well as reformatting to desired final layout e Scanning plain text files or printouts from a spreadsheet usually works but the text must be imported into a spreadsheet and reformatted to match the original What source material does not work well for OCR e Forms especially with boxes and check boxes e Very small text e Multi generation fuzzy or blurry copies from a copy machine e Mathematical formulas e Draft copies of documents with hand written revisions e Fancy text and unusual fonts e Handwritten text CSLP Scanners HM PC Page 4 OmniPage 1 Open the OmniPage software 2 Verify that the scanner has been selected by going to Settings Select Scanner
13. scanning e Make sure the scanner glass is free of dust fingerprints and smudges Clean it with a soft lint free cloth and a mild non alcohol based cleanser e Determine if the artwork is either a photograph or a print If you can see little dots of colour making up the image then it is a halftone print e Consider how the image will be used e Some older scanners work better if they are allowed to warm up before scanning e Some scanners may have a hot spot where light is more intense Learn where this hot spot is and avoid it e When scanning for screen display you need only be concerned with pixel dimensions A computer monitor displays approximately 96 pixels per inch So if you want an image to appear approximately 1 1 2 by 2 inches on a web page scan it at 150 by 200 pixels e Use no more than 100 dpi ppi when scanning for screen display e Measure dimensions in pixels 100 pixels on screen is approximately one inch Basics of scanning Please use the user s manual of the specific equipment you are using to locate the specifications for the controls of your scanner The following steps are typically followed when scanning 1 Choose the material to scan 2 Orient your original on the glass properly Scanners differ about placement but usually have some indicator in the corner where you need to position the original 3 Locate the scanner s sweet spot A scanner has a sweet spot that can provide sharper
14. tons below the scaling allow you to apply different effects to the image The first one creates a mirror image the second one changes your image to a negative reverses the colours and the third button changes the Scaling scroll bars so you can change the width and height of the image independantly and thus change the proportions of the image Colour adjustment Another useful feature is Colour adjustment You can find this under the Tools menu By moving around the circular pointer on the colour palette displayed you can change the colours of your image The colours of your image will change instantaneously to reflect the new colour scheme you have selected CSLP Scanners HM PC Page 8 Scanning an image Click on the Preview button to get a preview of what the scanned image looks like Now you can play around with the different settings to see what you like best To scan one part of the image If you want to scan only a part of image you can do this by dragging the cursor so that a box is displayed around the desired area You must now click on the Zoom button so only this area will be scanned Saving a sean When you are satisfied with the way your image looks you should save it You can find the Save option under the File menu or you can simply click on Final You will need to enter a name for your image here For Save as type select MS Windows 3 0 Bitmap format unless you
Download Pdf Manuals
Related Search