Threshold effect in visual perception of geometrical figures.
Filtering of the input image has been shown to play a central role in several aspects of visual perception. In our experiments in visual perception of the area of geometrical figures the orientation in random dot patterns, and some visual illusions, we have shown that a threshold effect inferred from the filtering of the input image produces a perceptual error. This error has been explained by using the concept of Image Function. The present paper is a brief review of our experimental results and of the models we have proposed.
Institute of Cybernetics, Italian National Research Council, Arco Felice, Italy. vdm@biocib.cib.na.cnr.it
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D006801:Humans; D008960:Models, Psychological; D009903:Optical Illusions; D010364:Pattern Recognition, Visual; D017603:Signal Detection, Psychological; D012858:Size Perception