Classifying illusory contours: Edges defined by ''pacman'' and monocular tokens

被引:12
作者
Westheimer, G
Li, W
机构
[1] Division of Neurobiology, University of California, Berkeley
[2] 321 Life Sciences Addition, University of California, Berkeley
关键词
D O I
10.1152/jn.1997.77.2.731
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Thresholds for the discrimination of orientation were measured in the human fovea for figures and borders delineated by solid lines and by ''pacman'' tokens as introduced by Kanizsa, as well as by contours induced by monocular tokens giving a stereoscopic depth illusion of a knife edge. Orientation discrimination of these illusory contours is poorer by a factor of similar to 2 than that of equivalent contours made of solid lines and is not much better than that for their supporting structures if taken alone. It is concluded that these kinds of illusory borders do not address the ''border'' or ''edge'' mechanism in the same way as real lines. Orientation discrimination and simultaneous orientation contrast (tilt illusion) were compared for a variety of illusory borders. The more robust the borders, i.e., the more sensitive to changes in orientation, the less their susceptibility to the tilt illusion.
引用
收藏
页码:731 / 736
页数:6
相关论文
共 22 条
[1]  
[Anonymous], 1987, PERCEPTION ILLUSORY
[2]   ILLUSORY, MOTION, AND LUMINANCE-DEFINED CONTOURS INTERACT IN THE HUMAN VISUAL-SYSTEM [J].
BERKLEY, MA ;
DEBRUYN, B ;
ORBAN, G .
VISION RESEARCH, 1994, 34 (02) :209-216
[3]   PARALLEL DETECTION OF KANIZSA SUBJECTIVE FIGURES IN THE HUMAN VISUAL-SYSTEM [J].
DAVIS, G ;
DRIVER, J .
NATURE, 1994, 371 (6500) :791-793
[4]  
DAY RH, 1987, PERCEPTION ILLUSORY, P53
[5]   PSYCHOPHYSICAL MEASURES OF ILLUSORY FORM PERCEPTION - FURTHER EVIDENCE FOR LOCAL MECHANISMS [J].
DRESP, B ;
BONNET, C .
VISION RESEARCH, 1993, 33 (5-6) :759-766
[6]   SPATIAL DISPLACEMENT, BUT NOT TEMPORAL ASYNCHRONY, DESTROYS FIGURAL BINDING [J].
FAHLE, M ;
KOCH, C .
VISION RESEARCH, 1995, 35 (04) :491-494
[7]   THE INFLUENCE OF CONTEXTUAL STIMULI ON THE ORIENTATION SELECTIVITY OF CELLS IN PRIMARY VISUAL-CORTEX OF THE CAT [J].
GILBERT, CD ;
WIESEL, TN .
VISION RESEARCH, 1990, 30 (11) :1689-1701
[8]  
HERING E, 1862, BEITRAEGE PHYSL, P25
[9]   DAVINCI STEREOPSIS - DEPTH AND SUBJECTIVE OCCLUDING CONTOURS FROM UNPAIRED IMAGE POINTS [J].
NAKAYAMA, K ;
SHIMOJO, S .
VISION RESEARCH, 1990, 30 (11) :1811-1825
[10]  
Panum PL., 1858, PHYSL UNTERSUCHUNGEN