ArticleVision research2013
Inconsistent channel bandwidth estimates suggest winner-take-all nonlinearity in second-order vision.
Article in Vision research, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Image segmentation driven by elements of form.Vision research · 2019Article
- Broad bandwidth of perceptual learning in second-order contrast modulation detection.Journal of vision · 2015Article
- Pooling of first-order inputs in second-order vision.Vision research · 2013Article
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Authors and funding
3 authors.
Funding
Abstract
The processing of texture patterns has been characterized by a model that postulates a first-stage linear filter to highlight a component texture, a pointwise rectification stage to convert contrast for the highlighted texture into mean response strength, followed by a second-stage linear filter to detect the texture-defined pattern. We estimated the spatial-frequency bandwidth of the second-stage filter mediating orientation discrimination of orientation-modulated second-order gratings by measuring threshold elevation in the presence of filtered noise added to the modulation signal. This experiment yielded no evidence for frequency tuning. A second experiment, in which subjects had to detect similar second-order gratings while judging their modulation frequency, produced bandwidth estimates of 1-1.5 octaves, similar to estimated bandwidths of first-order channels. We propose that an additional dominant-response-selection nonlinearity can account for these apparently contradictory results.
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