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RELATIONSHIP BETWEEN THE SPATIAL-FREQUENCY TUNINGS OF THE FIRST- AND THE SECOND-ORDER VISUAL FILTERS
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RELATIONSHIP BETWEEN THE SPATIAL-FREQUENCY TUNINGS OF THE FIRST- AND THE SECOND-ORDER VISUAL FILTERS
Annotation
PII
S0205-95920000617-5-
Publication type
Article
Status
Published
Authors
VITALY BABENKO  PAVEL ERMAKOV Bozhinskaya M.A.
Abstract
Recent researches have denoted the existence of preattentive mechanism of spatial grouping of visual information produced by the second-order filters. This study aims to determine the rule of integration of the first-order filters on the second-order ones. For this purpose, chess textures derived from Gabor's elements were applied, which exluded those artifacts that are essential for the "noise" textures. The threshold amplitude of modulation of contrast, orientation or spatial frequencies for different frequency ratios of envelope and carrier was determined. The threshold of modulation detecting was found to be minimal at certain frequencies' ratio. The optimal ratio remains constant while the carrier's frequency is changing. This proves that the grouping of the first order filters on the second order ones conforms to a certain universal rule
Keywords
preattantive vision, spatial grouping, textures, modulation.
Date of publication
01.03.2010
Number of purchasers
2
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531
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S0205-95920000617-5-1 Дата внесения правок в статью - 11.11.2020
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