type history is implemented. the type of a worm can change during the video, but it's still recognized as the same worm. the final type of the worm is the average over the history of the worm. this doesn't work very well. everything ends up being categorized as a car. viewing the types updated frame-by-frame it doesn't appear this way though. further investigation is necessary.
the indicator box sometimes lags behind the moving blob. the blob joining might not be updating the blobs correctly. we haven't been able to find the documentation for the CopyEdges() function in OpenCV, but that's probably where the problem is.
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