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I'd like to find an algorithm that can detect the movement (and movement-vector) of a rectangular area -- like scrolling a window would produce -- in an image-stream. Any ideas? :)

Richard Durr
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    did you try to read this? http://stackoverflow.com/questions/2124740/how-to-code-simple-motion-tracking – Igor Milla Mar 03 '11 at 23:51
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    yes, however, the discussion is 1.not helpful 2. refers to general motion detection. I know that a whole rectangle moves, so this should in principle be faster. – Richard Durr Mar 04 '11 at 13:26

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Optical Flow's idea should work, but it depends on the type of features you have in the window (images, text), and whether they're unique enough to be matched reliably in subsequence frames.

RANSAC is a method of given two images, it would compute the homography affine transformation from one image to the other, given that the features matched between them are mostly matched correctly

MMD
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