Calculating Values for Spatial Position with Grouping
Roger J. Watt · Psychology Press eBooks · 2022
This chapters starts by examining how luminance in images was related to surface creases and discontinuities. It finds necessary to take a second derivative of the luminance to find all the interesting image features. The chapter also finds necessary to take the second derivative over a range of different spatial scales, so that surface texture did not obscure real edges. Grouping is a word used by psychologists to discuss a selective association within a representation of certain elements of the description corresponding to certain features of a visual image. A computational grouping that initially delivered a partial representation that matched many task requirements would be valid and efficient. If the visual system could aggregate local clusters of dots or whatever into groups and produce a spatial position solution (a spatial metric) for the groups as individual entities rather than for their component dots, then a first approximation to spatial layout could be computed much more rapidly.