Applied Optics · 1993 · 30 citations · 16 references
MedicinePhysiologyVision ScienceContrast SensitivityVisual PerceptionVisual PsychophysicsLuminance PerceptionPsychophysicsSpatial Frequency ProcessingVisual NeurophysiologyVisual PhysiologyVisual SystemHuman Visual ResponseSpatial Frequency AnalysisSpatial Frequency ChannelsVisual ChannelsVisual Signal ProcessingWavelet AnalysisWavelet TransformWavelet Transform Analysis
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 ƒ) 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.
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