Transparent surfaces defined by implicit X junctions.
An X junction is known to be a strong cue for transparency whereas a T junction typically indicates occlusion by an opaque surface. In this article, however, we will demonstrate two cases in which special T junctions (implicit X) can support the perception of a transparent surface. The T junction is perceived as having an additional illusory contour rendering it as an implicit X junction. There is physically realizable condition in which transparency can produce a T junction and the existence of this special case may explain why T junctions are not necessarily taken as cues for opaque surface. The similar processing for X junctions and implicit Xs to form transparent surfaces is suggested.
Watanabe
T
T
Vision Science Laboratory, Arizona State University West, Phoenix 85069-7100.
Cavanagh
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P
D000328:Adult; D003463:Cues; D003867:Depth Perception / Q000502:physiology; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D009903:Optical Illusions / Q000502:physiology*; D015348:Vision, Binocular; D014796:Visual Perception / Q000502:physiology*