1988 volume 17(2) pages 191 – 202
doi:10.1068/p170191

Cite as:
Alter I, Schwartz E L, 1988, "Psychophysical studies of shape with Fourier descriptor stimuli" Perception 17(2) 191 – 202
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Psychophysical studies of shape with Fourier descriptor stimuli

Isabelle Alter, Eric L Schwartz

Received 11 May 1987, in revised form 27 March 1988

Abstract. The Fourier descriptor (FD) method of shape representation provides a convenient description for the outlines of shapes. It can also be used to generate orthogonal patterns (FD stimuli) which are uniquely characterized by their frequency, amplitude, and phase. Psychophysical studies were conducted to assess threshold tuning properties and frequency specificity during adaptation to FD stimuli. The results suggest the operation of filters which are characterized by the parameter 'curvature frequency'.

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