Correspondence of two or more views of a rigid 3-D object is usually found by stereo. If the capturing conditions allow it, it is easier and more robust to do it by tracking in a dense view sequence.
Dense sequence of a rigid 3-D object (plaster cast of human teeth arc) is captured. Simplified epipolar geometry: epipolar lines = scanlines.
Epipolar image = intensities in a single scanline in different frames.
Edges detected and tracked in each row separately. The maximum interframe disparity is so small that the matching is unique --> the tracking is very simple.
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