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- This application illustrates the use of the Tracker3DFilter - to perform multi-camera 3D tracking. The intention with this application - is to provide a straightforward example of the use of - Tracker3dFilter in a Windows MFC application. The program - serves a second purpose as well in it's ability to log results from - the tracker to a file for testing or debugging. The details of - configuring the Tracker3dFilter for operation are discussed further - in the document describing the Filter and it's property page. - Here we will deal specifically with the demonstration application.
-- The initial configuration of the application is - specified via a series of command line arguments: -
-Tracker3dDemo.exe <-blob> <-[c|C]intrinsicsfilename> - <-s#,#> <-n#> <-m#> <-t#> - <-llogfilename> graphfile.grf
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| -blob | -Operate in BlobTracker mode. The default is to operate in CamShiftTracker - mode | -
| -c|C | -"c" instructs the application to calibrate with the filename - intrinsictsfilename "C" instructs the program to calibrate the camera location - continuously (for testing only). Specify the camera intrinsic files in - the same order that the cameras are attached to the input pins of the filter in - the graph. | -
| -s | -specify the dimensions of the checkerboard that will be used in calibrating the - cameras, only has an effect when "c" or "C" options are specified | -
| -n | -specify the number of objects to track (in BlobTracker mode only) | -
| -m | -specify the minimum area of object to track in pixels (in BlobTracker mode - only) | -
| -t | -specify the minimum brightness of the objects to track (0-255, in BlobTracker - mode only) | -
| -l | -operate in debugging mode and log results to a file | -
When the application runs it will open one video render window for - each camera attached to the Tracker3dFilter in the DirectShow graph - specified on the command line. There will also be a control panel - dialog which provides access to the tracker parameters, allows - calibration of the cameras and displays the tracking results. The - layout and function of this dialog is presented below.
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| Camera Calibration | -- |
| Calibrate Cameras | -Pressing this button will produce a dialog box with which to specify the camera - intrinsics files for each of the | -
| Checkerboard Width | -Specifies the width of the checkerboard in squares | -
| Checkerboard Height | -Specifies the height of the checkerboard in squares | -
| Tracker Results - | -- |
| - | This is the location where the application will output the coordinates of the - tracked objects (up to 3 in up to 3 rows) These results are updated per - frame as the tracker runs. | -
| Tracker Config - | -- |
| Number of Objects | -Specifies the number of objects the BlobTracker will track, the CamShiftTracker - will track only one | -
| Threshold | -Specifies the minimum brightness of the objects the BlobTracker will - track. Range is 0-255 for black to white. Has no effect in - CamShiftTracker mode. | -
| Min Size | -Specifies the minimum size of the object the BlobTracker will track in - pixels. Has no effect in CamShiftTracker mode. | -
| Output Config | -- |
| Color classified pixels | -If selected the pixels in the images are colored when they area a part of - an object found by BlobTracker | -
| Bounding box | -If selected a bounding box is drawn around each of the objects found by the - BlobTracker | -
| Exit - | -- |
| - | Exit the Application | -