Wavelets for image quality on LCD matrix display

摘要

A novel method for image quality measurement on color matrixndisplay using wavelet stimuli is described. Experimental results onncontrast and brightness perception are given for a color LCD (liquidncrystal display) matrix in the 1-8 cycles/degree range. The preliminarynexperiments show a frequency dependence of the contrast sensitivityncurve similar to results with linear grating only at high spatialnfrequencies (⩾2 cycles/degree); results follow Weber's law at lownfrequencies (⩽8 cycles/degree). A weak dependence of the luminositynthreshold with respect to ambient illumination has been observed