Moravec’s Method

Corner Detection

Demo

Moravec’s corner detector functions by considering a local window in the image, and determining the average changes of image intensity that result from shifting the window by a small amount in various directions. Three cases need to be considered:

A. If the windowed image patch is flat (ie. approximately constant in intensity), then all shifts will result in only a small change;

B. If the window straddles an edge, then a shift along the edge will result in a small change, but a shift perpendicular to the edge will result in a large change;

C. If the windowed patch is a corner or isolated point, then all shifts will result in a large change. A corner can thus be detected by finding when the minimum change produced by any of the shifts is large.

References