Bandpass channels, zero-crossings, and early visual information processing.
Under appropriate conditions zero-crossings of a bandpass signal are very rich in information. The authors examine here the relevance of this result to the early stages of visual information processing, where zero-crossings in the output of independent spatial-frequency-tuned channels may contain sufficient information for much of the subsequent processing.
D006801:Humans; D007257:Information Theory; D008954:Models, Biological; D014785:Vision, Ocular