Abstract

In this paper we report on an analysis of visual stimuli models by a wavelet function. The human visual process is compared with a wavelet transform. Wavelet functions have been built from the Haar function. Two stimuli were analyzed by a wavelet function: a sinusoidal luminance stimulus (spatial frequency f) and a luminance-varying regular stimulus. The theoretical results obtained from the wavelet transform are compared with the physiological results of R. Blake [in Frontiers in Visual Science, S. J. Cool and E. L. Smith, eds. (Springer-Verlag, Berlin, 1978), pp. 209–219] and K. K. De Valois [in Frontiers in Science, S. J. Cool and E. L. Smith, eds. (Springer-Verlag, Berlin, 1978), pp. 277–285]. A theoretical curve conforms to the shape of the contrast sensitivity curves. Hence it can be concluded that the wavelet transform is a new approach to human visual mechanisms.

© 1993 Optical Society of America

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