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- W2016282267 abstract "Models of the visual cortex are based on image decomposition according to the Fourier spectrum (amplitude and phase). On one hand, it is commonly believed that phase information is necessary to identify a scene. On the other hand, it is known that complex cells of the visual cortex, the most numerous ones, code only the amplitude spectrum. This raises the question of knowing if these cells carry sufficient information to allow visual scene categorization. In this work, using the same experiments in computer simulation and in psychophysics, we provide arguments to show that the amplitude spectrum alone is sufficient for categorization task. To cite this article: N. Guyader et al., C. R. Biologies 327 (2004). En traitement d'image, la modélisation du cortex visuel permet une décomposition des images selon leur spectre de Fourier (amplitude et phase). Il est communément admis que l'information de phase est nécessaire à l'identification d'une scène. Or, nous savons que les cellules complexes du cortex visuel (les plus nombreuses) codent uniquement le spectre d'amplitude. Se pose alors la question de savoir si ces cellules véhiculent une information suffisante pour permettre la catégorisation de scènes visuelles. Nous montrons, par une simulation informatique inspirée de la biologie du système visuel et par une expérience de psychophysique, que le spectre d'amplitude seul suffit à catégoriser des scènes. Pour citer cet article : N. Guyader et al., C. R. Biologies 327 (2004)." @default.
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- W2016282267 date "2004-04-01" @default.
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- W2016282267 title "Image phase or amplitude? Rapid scene categorization is an amplitude-based process" @default.
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- W2016282267 doi "https://doi.org/10.1016/j.crvi.2004.02.006" @default.
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