calcOpticalFlowPyrLK returning points out of the camera frame

asked 2016-08-04 14:26:54 -0600

Running a 480x640 video through the Lucas-Kanade optical flow tracker example, I'm getting some tracked points that are beyond the camera frame, like negative x and y coordinates. How is this possible? Is this a bug?

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answered 2018-08-09 09:15:25 -0600

gasparitiago
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No, it's not a bug.

Some points can be tracked outside the image because they can be "lost" by the tracker algorithm. You can detect which points are lost using the status output parameter.