TRANSPARENCY - RELATION TO DEPTH, SUBJECTIVE CONTOURS, LUMINANCE, AND NEON COLOR SPREADING

被引:139
作者
NAKAYAMA, K
SHIMOJO, S
RAMACHANDRAN, VS
机构
[1] SMITH KETTLEWELL EYE RES INST, SAN FRANCISCO, CA 94115 USA
[2] UNIV CALIF SAN DIEGO, DEPT PSYCHOL, LA JOLLA, CA 92093 USA
关键词
D O I
10.1068/p190497
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
The perception of transparency is highly dependent on luminance and perceived depth. An image region is seen as transparent if it is of intermediate luminance relative to adjacent image regions, and if it is perceived in front of another region and has a boundary which provides information that an object is visible through this region. Yet, transparency is not just the passive end-product of these required conditions. If perceived transparency is triggered, a number of seemingly more elemental perceptual primitives such as color, contour, and depth can be radically altered. Thus, with the perception of transparency, neon color spreading becomes apparent, depth changes, stereoscopic depth capture can be eliminated, and otherwise robust subjective contours can be abolished. In addition, we show that transparency is not coupled strongly to real-world chromatic constraints since combinations of luminance and color which would be unlikely to arise in real-world scenes still give rise to the perception of transparency. Rather than seeing transparency as a perceptual end-point, determined by seemingly more primitive processes, we interpret perceived transparency as much a 'cause', as an 'effect'. We speculate that the anatomical substrate for such mutual interaction may lie in cortical feed-forward connections which maintain modular segregation and cortical feedback connections which do not.
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页码:497 / 513
页数:17
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