Proceedings chapter (Published version) (1000 Kb) - Free access
Figure-ground separation: evidence for asynchronous processing in visual perception?
|Published in||H. Kaiser, R. Bach & H. Bunke. Third Annual Meeting of the Swiss Group for Artificial Intelligence and Cognitive Science. Biel-Bienne (Switzerland) - October 10-11, 1991 - Bern: Universität Bern. 1992, p. 36-48|
|Abstract||The performance of the human visual system in extracting noisy figures from a noisy background is astonishingly good. Even in situations of very poor contrast, boundaries emerge clearly. Conversely, typical edge detectors fail to give good results for such images. In an attempt to explain the discrepancies in these performances we have developed a neural network model relying on two assumptions, both of which are based on neurophysiological findings. Firstly, the processing of visual information is considered ta be asynchronous: stimuli are delayed accordingly to their intensity. Secondly, emergent boundaries have the property of producing coherent responses corresponding to the (near)-simultaneous responses of cells in the cortical orientation columns. Results show that such neural network can indeed benefit from the asynchrony when treating images with ratio signal-to-noise particularly low.|
|Keywords||asynchronous visual processing — edge detector — neurophysiological model|
|BURGI, Pierre-Yves. Figure-ground separation: evidence for asynchronous processing in visual perception?. In: H. Kaiser, R. Bach & H. Bunke (Ed.). Third Annual Meeting of the Swiss Group for Artificial Intelligence and Cognitive Science. Biel-Bienne (Switzerland). Bern : Universität Bern, 1992. p. 36-48. https://archive-ouverte.unige.ch/unige:47732|