Abstract
Two models for simulating lateral inhibition in the visual process are described. One model, a nonrecurrent type, is composed of a flying spot scanner and dual phototubes with a dully focused wide spot. The area of the spot is divided into two parts, each of which is picked up by each of the two phototubes. The difference of the outputs is displayed on a CRT screen as an intensity modulated pattern. The Mach effect is seen and, by further thresholding the output, edges and terminals of pictures are extracted.
In the second model, a recurrent type, two pairs of CRT and vidicon tubes are interconnected one after another and alternately scanned so as to realize a lateral inhibition having a certain time delay. On a CRT display is seen the Broca-Sulzer effect, and it is shown that an object moving within a certain velocity range can be detected by this model. The second model is considered as an extended one that includes the first model.
