Last modified on 3 June 2009, at 13:53

SwisTrack/Components/CamShiftTracking

DescriptionEdit

Uses CamShiftTracking. I always ran it on the post-background-subtracted video. That worked well, but it tended to lose the person when they moved too quickly. I track only using R. I recently added multidimensional histograms so it can use more than one channel but it doesn't work so well. I use motion templates for my tracking now.

On the other hand, I think it should be possible to get this working... cam shift is *supposed* to be good.

ParametersEdit

HistogramDimensionsEdit

The number of histogram dimensions; the number of channels to use in tracking.

VMinEdit

Threshold for "almost black."

SMinEdit

Threshold for "almost grey."


These parameters screen out noise. Read "Seeing with OpenCV" from Servo magazine for details. Swistrack uses the library described in that article. (Google for camshift-Servo-OpenCV-part3.pdf.)

InitialWindowSizeEdit

The length in pixels of the side of a square to make an initial window size. It will always use the same size. Really it should set this automatically from the particle...

FrameKillThresholdEdit

The number of frames to keep the track around before killing it, if it hasn't been updated.

MinNewTrackDistanceEdit

The minimum distance a new track must be from existing tracks.

TrackDistanceKillThresholdEdit

If two tracks get less than this distance to each other, the shorter one will be destroyed.

MaximumNumberOfTracksEdit

The maximum number of simultaneous trackers.