Local shape of pictorial relief.
Local shape of pictorial relief.
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作者:
Koenderink J;van Doorn A;Wagemans J
How is pictorial relief represented in visual awareness? Certainly not as a “depth map,” but perhaps as a map of local surface attitudes. Here we consider the possibility that observers might instead, or concurrently, represent local surface shape, a geometrical invariant with respect to motions. Observers judge local surface shape, in a picture of a piece of sculpture, on a five-point categorical scale. Categories are cap–ridge–saddle–rut–cup–flat, where “flat” denotes the absence of shape. We find that observers readily perform such a task, with full resolution of a shape index scale (cap–ridge–saddle–rut–cup), and with excellent self-consistency over days. There exist remarkable inter-observer differences. Over a group of 10 naive observers we find that the dispersion of judgments peaks at the saddle category. There may be a relation of this finding to the history of the topic—Alberti's (1827) omission of the saddle category in his purportedly exhaustive catalog of local surface shapes.
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影响因子:
1.9
作者:
Koenderink JJ;van Doorn AJ;Wagemans J
通讯作者:
Wagemans J
影响因子:
2.1
作者:
Koenderink, Jan;van Doorn, Andrea
通讯作者:
van Doorn, Andrea
DOI:
10.1364/josa.10.000137
发表时间:
1925-02-01
影响因子:
--
作者:
Ames, A
通讯作者:
Ames, A
影响因子:
1.7
作者:
Koenderink, JJ;van Doorn, AJ;Todd, JT
通讯作者:
Todd, JT
DOI:
10.3758/bf03206710
发表时间:
1992-11-01
期刊:
PERCEPTION & PSYCHOPHYSICS
影响因子:
--
作者:
KOENDERINK, JJ;VANDOORN, AJ;KAPPERS, AML
通讯作者:
KAPPERS, AML