Video Stabilizer
Contents
1. access the configuration page enter the IP address into a web browser The stabilizer unit will display a welcome page NVC100 STBA Video Stabilizer Main Setup Help NVC100 STBA Version 0 00 15 Click the Setup link to access the configuration page Remember the default username and password are root and pass respectively Once access has been granted the stabilizer unit will display the configuration page WT video Stabilizer Basic Configuration NVC100 STBA Video Stabilizer Main Setup Help Basic Configuration Basic Advanced Stabilization Video Setting Video Output Border In fill Stabilization Mode The stabilization mode has 2 options On Default Stabilization is enabled Off Stabilization is disabled video pass through Video Output The video output mode has 2 options Full Screen Default The output signal is the full screen stabilized version of the input signal Split Screen Demo The output signal consists of 50 un stabilized and 50 stabilized versions of the input signal split vertically down the middle of the output This mode is primarily used for demonstrating the effectiveness of the stabilization unit on a single monitor and would not normally be used in day to day operation Border In fill In order to keep the output frames steady and aligned to a reference frame the output frames are shifted with respect to the input frames As the camera moves aroun2. disables the stabilization when excessive pan or tilt motion is detected This makes it easier to control pan tilt cameras because the Stabilizer ceases to oppose operator pan tilt commands above the threshold Once panning stops there is a 3 sec timeout period before stabilization is reactivated Low Detail When this option is enabled the algorithm is disabled when a scene with insufficient detail for reliable stabilization is detected This prevents the image position hunting when there is very little scene detail or features For example when the camera is pointed at a completely blank wall the stabilized image will jump around slightly because it is locking on to the random video noise Similar hunting problems can occur in other situations where a large part of the scene lacks suitable detail for Stabilizer lock e Other low contrast situations such as at night scenes e Scenes with an absence of detail in one direction such as venetian blinds e Scenes with a repeated pattern such as a brick wall Note enabling the Low Detail mode can result in the stabilization being disabled prematurely on low contrast or noisy video which is why this mode is not enabled by default On Screen Annotation When this option is enabled a message will appear on the screen whenever stabilization is disabled It is not intended that On Screen Annotation is permanently enabled Generally it should be used to help set up the Stabilizer in the follow
3. image jumps about The stabilizer cannot find any features in the image to lock on and does not lock on properly to or the features repeat brick wall or lack detail in a particular direction venetian blinds Stabilization can be suppressed in these cases by selecting the Auto Disable Low Detail option on the Advanced Configuration page The stabilization is not very good with The default stabilization algorithm does not suppress slow slow camera sway movement to allow tracking of intentional PTZ Pan Tilt Zoom movements See frequency response graph in the specification Selecting Slow Stabilization mode in the Camera Installation settings on the Advanced Configuration page will improve low frequency stabilization but will make PTZ tracking performance worse Sometimes incorrect data can be seen When border infill is enabled blank areas of the image left by in the border area the stabilizer shifting the image are filled in with old image data Sometimes this does not match well with the live part of the image This is especially apparent when the camera is panning and old data is left for a long time Disable border infill if this is causing distraction by selecting None or Fixed from the Border Infill setting on the Basic Configuration page The image is not being stabilized Make sure the Maximum Frame Shift settings are not set too properly small For example if the camera shake is causing the ima
4. Saturation and Sharpness of the video Delay Settings Change the vertical and horizontal capture delay of the video These settings affect the vertical and horizontal position of the displayed image allowing the black borders to be equalised on either side and top and bottom of the image This adjustment may be necessary because some analogue video signals do not conform exactly to the blanking timing of the video standard and consequently a black stripe may be visible on one side of the image NOTE set Border in fill to none when adjusting the Delay Settings so that the effect of the horizontal and vertical delay can be seen clearly Video Stabilizer Restoring Factory Defaults Restoring the factory default settings is done by first removing the power and then restoring power while holding down the reset button on the front of the unit The reset must be held down for at least 10 seconds after power has been restored Video Stabilizer Troubleshooting Problem Solutio S The video output is not stabilized for This is quite normal the unit remains in loop through mode about 1 minute after connecting the while the internal Linux Operating System boots up The loop power supply through mode ensures that no video loss is incurred during this time The video is not synchronizing Make sure the correct video standard is selected NTSC or PAL on the Video Settings page of the Web browser interface Sometimes the
5. Video Stabilizer User Manual TECHNOLOGY Video Stabilizer Introduction The Video Stabilizer utilises advanced Digital Image Stabilizing algorithms to minimize the effects of camera shake These algorithms have been optimized to run in real time on a dedicated digital media processor that fits inside a box that can rest on the palm of your hand The video stabilizer has been designed to be totally plug and play meaning you can get started simply by plugging in and switching on This quick start guide will help you get your video stabilizer up and running quickly as well as lead you through some of the advanced options provided by this unit Video Stabilizer Connecting Up Connect the video stabilizer as shown in the diagram i a I 12V DC VIDEOIN VIDEO OUT ETHERNET e lt The video stabilizer is intended to be connected in line between the video source and the video display Connect the power to the unit with the supplied power adaptor Your video stabilizer should now be operational and stabilizing video There is no need to perform any other set up Note the Stabilizer takes about 1 minute to start operating this is caused by the internal Linux operating system booting up During the start up time the stabilizer remains in loop through mode In the event of a power failure to the video stabilizer unit the video will pass through the unit un stabilized The Ethernet connection is only for ad
6. ct it in line between camera amp monitor About 1 minute Stabilizer remains in loop through mode while the Linux Operating System starts Web browser interface for configuration of advanced modes Ethernet 10 100 Mbps 0 60 C lt 85 RH Universal 12V plug top adapter 100 240V 2 5W 210mA at 12V DC 145g L 98mm W 99mm H 26mm Attenuation Vs Frequency 6 0 dB Tea Tra ee Default mode QQ No Low Frequency mode 18 0 dB nods LYN pe B 0 01 Hz 1 0 Hz 10 0 Hz
7. d so the output frames are shifted to keep the image features aligned to previous frames This results in areas for which there is no image data available Video Stabilizer No Image Data The Border In fill mode controls what happens to those areas that do not contain any image data There are 4 options available Fast Fade Default Newer frames are composited on top of older frames The old frames are faded away to black quickly see diagram This mode is most suited to PTZ and fixed cameras Slow Fade Newer frames are composited on top of older frames The old frames are faded away to black slowly see diagram No Fade Newer frames are composited on top of older frames The old frames are not faded away see diagram Suitable for fixed cameras where there is minimal movement by people and cars around the edge of the scene Fixed A fixed size black border is present on all sides which blanks out the moving edges of the image see diagram The size of the borders is equal to the maximum frame shift See Advanced Configuration None Old frames are not displayed Regions of the output image for which there is no available data are filled with black see diagram Fast Slow Fade No Fade Fixed None Video Stabilizer ENA Advanced Configuration NVC100 STBA Video Stabilizer Main Setup Help guo pr Advanced Configuration Basic Advanced Camera Installation b Video Setting Fix
8. ed PTZ default gt Activation Auto Disable A Cl Fanit Options i Cl Low Detail On screen Annotation Setting Cl Enabled Maximum Frame Shift Horizontal pixels 32 256 default 128 Vertical pixels 32 256 default 128 EZ Camera Installation Mode The Camera Installation Mode has 3 options Fixed PTZ Default The stabilization algorithm parameters are optimized to give the best stabilization results for fixed PTZ cameras In vehicle Hand held The stabilization algorithm parameters are optimized to give the best Stabilization performance for cameras where the camera fixture experiences continued large displacements or scene changes E g when shot from a moving vehicle Low Frequency Stabilization The above 2 stabilization modes are designed to allow tracking of intentional camera panning by not stabilizing low frequency movements lt 1Hz The Low Frequency mode has a lower cut off frequency to allow better low frequency stabilization at the expense of worse tracking of intentional movement see Attenuation vs Frequency graph on the last page This mode will automatically switch to the higher frequency mode when excessive movement in one direction is detected in order to allow better tracking of intentional movement Once this movement has stopped it will revert back to the low frequency mode Video Stabilizer Auto Disable There are 2 options for Auto Disable neither is selected by default Pan Tilt This option
9. ge to move up and down by 50 pixels but the Maximum Vertical Frame Shift is set to 32 pixels the algorithm will not be able to stabilize the image properly The picture jumps around during fast Try enabling Auto Disable Pan Tilt on the Advanced panning Configuration page This will suppress stabilization when fast Pan Tilt motion is detected The unit is exhibiting strange behavior Try restoring the factory defaults Video Stabilizer Specifications Stabilization Stabilization tracking rate Stabilization range Stabilization frequency Video delay Stabilization Automatic algorithm Border Lock on time Video Video Input amp Output Video standards Video loop through D1 resolution digitization General Plug and Play Start up time Configuration Network Environmental Power adapter included Power consumption Weight Size 0 0 dB 12 0 dB Approx 3000 pixels sec Variable up to 256 pixels 0 1 30Hz see graph lt 80 ms X Y movement at sub pixel accuracy Locks on to background features Ignores moving objects and burnt in text Image in fill Removes distracting image border movement by using in filling data from previous frames lt 80ms from change of image Composite 1V 750 BNC connector PAL NTSC selectable via the web browser interface Automatic loop through when power is off and during start up 720 x 576 PAL 720 x 480 NTSC Works straight out of the box Simply conne
10. ing configuration situations e To see the effect of the Auto Disable pan tilt and Auto Disable Low Detail functions e To see if the stabilization is being disabled because the camera motion is too fast Maximum Frame Shift This is the maximum amount in image pixels that the algorithm will shift the frame horizontally and vertically in either direction from the normal position Both horizontal and vertical shifts are settable in the range 24 256 the default is 128 Usually the only reason to select low Frame Shift values is when the Border In Fill is in Fixed mode because as the borders are increased in size the viewable image area gets smaller by the same amount Warning Setting these values too low will prevent the algorithm from stabilizing properly The lower the setting the less stabilization range is possible Video Configuration NVC100 STBA Video Stabilizer Stabilizer Video Settings Video Video Video Standard Color Settings Brightness os 0 Contrast 92 0 Hue 128 o Saturation 128 jo Sharpness 128 0 Delay Settings Vertical Delay 2 Horizontal Delay fe Video Stabilizer Main Setup Help 255 default 128 255 default 92 255 default 128 255 default 128 255 default 128 128 default 20 NTSC 24 PAL 128 default 20 NTSC 14 PAL Video Standard Select between NTSC and PAL video standards Color Settings Change the Brightness Contrast Hue
11. vanced configuration see Advanced Configuration and is not required to get started DTE Video stabilizer Configuration Your stabilizer unit is shipped with the default options configured at the factory The default options are suitable for most applications but some installations may warrant slightly different configuration The following section details how to change the parameters from the default settings and the effect that they have Network Connection The advanced parameters are accessed by connecting the unit to a PC via an Ethernet switch or a crossover cable and accessing the device from a web browser Before the device can be accessed from a web browser the default IP address must be established The default IP address as set at the factory can be determined by locating the serial number and hardware MAC address which are normally printed on the bottom of the unit The serial number and MAC address are printed on a label that resembles the following 710030FFD MAC 00 13 23 03 0F FD MM TTT INT Ala aula ac address NVC100 STBA P140101010000 14001 The factory default network settings can now be inferred as follows IP address 192 168 xx yy Network mask 255 255 0 0 Gateway 192 168 0 1 User ID root Password pass Where xx yy can be calculated according to the following diagram HEX gt DEC MAC address 00 13 23 01 23 45 gt IP address 192 168 35 69 Video Stabilizer Configuration Page To
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