We studied whether the blur/sharpness of an occlusion boundary between a sharply focused surface and a blurred surface is used as a relative depth cue. Observers judged relative depth in pairs of images that differed only in the blurriness of the common boundary between two adjoining texture regions, one blurred and one sharply focused. Two experiments were conducted; in both, observers consistently used the blur of the boundary as a cue to relative depth. However, the strength of the cue, relative to other cues, varied across observers. The occlusion edge blur cue can resolve the near/far ambiguity inherent in depth-from-focus computations.
© 1996 Optical Society of America
Original Manuscript: May 8, 1995
Revised Manuscript: October 27, 1995
Manuscript Accepted: October 31, 1995
Published: April 1, 1996
Jonathan A. Marshall, Christina A. Burbeck, Dan Ariely, Jannick P. Rolland, and Kevin E. Martin, "Occlusion edge blur: a cue to relative visual depth," J. Opt. Soc. Am. A 13, 681-688 (1996)