The Role Played by Extremal Edges in Figure-ground Organization

ISBN-13: 9783836484060 / Angielski / Miękka / 2008 / 84 str.

Tandra Ghose; Stephen E. Palmer

Opis

Identifying and understanding the visual cues that determine relative depth across image contours (i.e., figure-ground organization) are central problems of vision science. In this monograph we report the figural cue of extremal edges (EEs), which arise when an opaque con­vex surface smoothly curves to occlude part of itself. We also compare classical cues to figure-ground organization with the recently disco­vered cue of EE. Our results show that EEs are surprisingly powerful pictorial cues to relative depth across a contour, almost entirely dominating the well-known figure-ground cues of relative size, con­vexity, surroundedness, and shape familiarity. These results demon­strate that natural shading and texture gradients in an image provide important additional information about figure-ground organization that has been overlooked in the past 75 years in research on figure-ground organization.

O autorze

Ghose, Tandra Tandra Ghose received her B.Tech.in Electrical Engineering from IIT,Kanpur,India(2001) and Ph.D.from UC Berkeley (2006).She is a postdoctoral researcher at the UCLA. Stephen Palmer received his Ph.D. from UCSD and has been on the faculty at U.C. Berkeley since 1974. He is the author of Vision Science: Photons to Phenomenology (MIT Press, 1999). Palmer, Stephen E. Tandra Ghose received her B.Tech.in Electrical Engineering from IIT,Kanpur,India(2001) and Ph.D.from UC Berkeley (2006).She is a postdoctoral researcher at the UCLA. Stephen Palmer received his Ph.D. from UCSD and has been on the faculty at U.C. Berkeley since 1974. He is the author of Vision Science: Photons to Phenomenology (MIT Press, 1999).