An applet for the Gabor similarity scaling of the differences between complex stimuli
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- 作者：Eshed Margalit ; Irving Biederman ; Sarah B. Herald…
- 关键词：2 ; D shape and form ; Similarity ; Face perception
- 刊名：Attention, Perception, & Psychophysics
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：78
- 期：8
- 页码：2298-2306
- 全文大小：1,461 KB
- 刊物主题：Cognitive Psychology;
- 出版者：Springer US
- ISSN：1943-393X
- 卷排序：78
文摘
It is widely accepted that after the first cortical visual area, V1, a series of stages achieves a representation of complex shapes, such as faces and objects, so that they can be understood and recognized. A major challenge for the study of complex shape perception has been the lack of a principled basis for scaling of the physical differences between stimuli so that their similarity can be specified, unconfounded by early-stage differences. Without the specification of such similarities, it is difficult to make sound inferences about the contributions of later stages to neural activity or psychophysical performance. A Web-based app is described that is based on the Malsburg Gabor-jet model (Lades et al., 1993), which allows easy specification of the V1 similarity of pairs of stimuli, no matter how intricate. The model predicts the psycho physical discriminability of metrically varying faces and complex blobs almost perfectly (Yue, Biederman, Mangini, von der Malsburg, & Amir, 2012), and serves as the input stage of a large family of contemporary neurocomputational models of vision.