Spatiotemporal Coupling and Scaling of Natural Images and Human Visual Sensitivities
نویسنده
چکیده
We study the spatiotemporal correlation in natural time-varying images and explore the hypothesis that the visual system is concerned with the optimal coding of visual representation through spatiotemporal decorrelation of the input signal. Based on the measured spatiotemporal power spectrum, the transform needed to decorrelate input signal is derived analytically and then compared with the actual processing observed in psychophysical experiments.
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Spatiotemporal Coupling and Scaling of Natural Images and Visual Sensitivity
The visual system is concerned with the perception of objects in a dynamic world. A signi cant fact about natural time-varying images is that they do not change randomly over space-time; instead image intensities at di erent times and/or spatial positions are highly correlated. We measured the spatiotemporal correlation function { equivalently the power spectrum { of natural images and we nd th...
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