Seeds of Perception
Michael Brady · 1987
Not all information is created equal. Different locations in an image (or range image) impose differing levels of constraint upon visual processes. We call locations in images (and other representations) that offer the tightest constraint seeds. We are exploring algorithms that work initially from seeds to locations of ever decreasing constraint. Thus in motion, we work from corners to edges and then to regions bounded by those edges. We recount recent progress in developing this theme in the problems of computing shape from contour, the determination of optic flow and structure from motion, and stereo. We review related work in shape from shading, and the interpretation of variable geometry planar shapes. The loci of two dimensional change that are discussed in this paper are uncovered by the programs of Fleck and Noble at this conference, as well as by Forsyth's colour labelling of edges. 2