Subjective contours at line terminations depend on scene layout analysis, not image processing

Barbara Gillam, Ken Nakayama
2002 Journal of Experimental Psychology: Human Perception and Performance  
Subjective contours at abutting lines, commonly attributed to levels of the visual system where image properties are directly encoded, are shown to require an explanation at the level of visual surface understanding. By the use of stereoscopic displays, subjective contours could either be abolished where they were monocularly strong or be created where they were monocularly nonexistent. Furthermore, it was shown that subjective contours are determined by the boundaries of occluded rather than
more » ... luded rather than occluding regions. The results cannot be accounted for by adding a stereo component to existing image-based theories, such as those based on end-stopped cells. Instead, any plausible process must explicitly determine the position of bounding surface contours in the scene. Minimum requirements of such a process are given.
doi:10.1037//0096-1523.28.1.43 fatcat:2mvl6wqunnawxd2bmquu46flqy