TY - JOUR
T1 - The combined influence of binocular disparity and shading on pictorial shape
AU - Doorschot, Paul C.A.
AU - Kappers, Astrid M.L.
AU - Koenderink, Jan J.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - The combined influence of binocular disparity and shading on pictorial shape was studied. Stimuli were several pairs of stereo photographs of real objects. The stereo base was 0, 7, or 14 cm, and the location of the light source was varied over three positions (one from about the viewpoint of the camera, one about perpendicular to the line of sight, and one in between the two). Therefore, in total, nine different combinations were studied. Subjects had to perform surface attitude settings at about 300 positions in the image plane. From the settings, depth maps were calculated on which a principal components analysis was performed. It was found that three components were enough to account for at least 97.8% of the variance in the data. The first component accounted for shape constancy. The effects of the two cues could be isolated as a linear combination of the other two components. The effects of the disparity and the shading cue variation were found to combine in almost linear fashion.
AB - The combined influence of binocular disparity and shading on pictorial shape was studied. Stimuli were several pairs of stereo photographs of real objects. The stereo base was 0, 7, or 14 cm, and the location of the light source was varied over three positions (one from about the viewpoint of the camera, one about perpendicular to the line of sight, and one in between the two). Therefore, in total, nine different combinations were studied. Subjects had to perform surface attitude settings at about 300 positions in the image plane. From the settings, depth maps were calculated on which a principal components analysis was performed. It was found that three components were enough to account for at least 97.8% of the variance in the data. The first component accounted for shape constancy. The effects of the two cues could be isolated as a linear combination of the other two components. The effects of the disparity and the shading cue variation were found to combine in almost linear fashion.
UR - http://www.scopus.com/inward/record.url?scp=0035537781&partnerID=8YFLogxK
U2 - 10.3758/BF03194522
DO - 10.3758/BF03194522
M3 - Article
C2 - 11578048
AN - SCOPUS:0035537781
SN - 0031-5117
VL - 63
SP - 1038
EP - 1047
JO - Perception & Psychophysics
JF - Perception & Psychophysics
IS - 6
ER -