CODEWITHSUNDEEP
c++opencv
Telo Pena Barreiro
Telo Pena Barreiro

Reputation: 277

How can I obtain a rectangle with camshift algorithm?

With the function

 cvMeanShift(&backproj, trackWindow,cvTermCriteria( CV_TERMCRIT_EPS | CV_TERMCRIT_ITER, 15, 1 ),&track_comp);

I can obtain a rectangle, aux=track_comp.rect;

But with this

RotatedRect trackBox = CamShift(backproj, trackWindow,TermCriteria( CV_TERMCRIT_EPS | CV_TERMCRIT_ITER, 10, 1 ));

How can I obtain a rectangle? not a rotated rectangle.

Upvotes: 1

Views: 750

Answers (1)

BW0
BW0

Reputation: 767

The documentation is unclear, but the CamShift function modifies trackWindow to the latest position of the object. (trackWindow is passed by reference). You should use the same trackWindowvariable for initialization of tracking for the next frame.

trackbox.boundingRect() turns out to not give the same Rect as the one written to trackWindow. trackbox.boundingRect() is bigger than the Rect written to trackWindow.

This answer is for opencv 2.4.5.0 and above. It probably holds for all opencv 2.0 and above though, but I have not verified this.

Upvotes: 1

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