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Visual sensitivity to two-dimensional spatial phase.

T Caelli·P Bevan
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Abstract

We investigate some limits to phase processing in the human visual system with two-dimensional textured images. Results indicate that, although phase sensitivity increases with contrast and energy components of the image, observers cannot discriminate between images and their 45 degrees phase-quantized versions under brief exposure and lower- (less than or equal to 30%) contrast conditions. These results seem to be frequency independent although modulated by different energy levels at each two-dimensional frequency band. Finally, we have analyzed some past texture-discrimination results that occur under identical amplitude-spectra conditions. Here also phase-quantization differences seem to constitute an adequate explanation of discrimination performance.

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HumansSpace PerceptionVisual AcuityJournal ArticleResearch Support, Non-U.S. Gov't

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T Caelli, P Bevan. 1982. Visual sensitivity to two-dimensional spatial phase.. https://doi.org/10.1364/josa.72.001375

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