Contours Example.

Tracing Birds.

Are two shapes similar?

Our computer knows the answer

In order to measure similarity between shapes, we first match between the contours that bound the shapes. We do it for quite dissimilar shapes. In this example: for two different views of the same object. The algorithm does not use any information but the occluding contour, and matches between segments that are locally similar.

Watch the birdie

Watch how the contour grows along the related part of each bird.

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