Perception and recognition of normal and negative faces: The role of shape from shading and pigmentation cues
Perception and recognition of normal and negative faces: The role of shape from shading and pigmentation cues
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DOI：
10.1068/p250037
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发表时间：
1996-01-01
期刊：
影响因子：
1.7
通讯作者：
Musselman, A
中科院分区：
文献类型：
--
作者：
Kemp, R;Pike, G;Musselman, A
A face is surprisingly difficult to recognise when presented in photographic negative, and negation has also been shown to affect simple perceptual judgments about a face. Two possible explanations for this effect are examined. In the shape-from-shading explanation it is argued that negating an image results in an impossible pattern of shading, and that this disrupts the formation of a three-dimensional representation of the surface geometry of the face. In an alternative account for this effect it is suggested that identification errors occur as a consequence of changes to the apparent pigmentation of the face caused by negating the image. Three experiments are reported which are designed to test these explanations by using novel colour-image transformations in which the hue and luminance components of images are independently manipulated. The results of these studies suggest that although changes to the apparent pigmentation of a face might result in identification errors in some situations, the loss of shape-from-shading cues is a more important cause of the negation effect. The role of these two sources of information in the recognition of normal faces is also discussed.
