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15 August 1989 Brightness Contrast And Sharpness, Interactive Factors In Perceptual Image Quality
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Brightness contrast is an important factor in perceptual image quality. In the case of a TV system it is dominantly determined by the luminance reproduction function. Subjective quality was found to be optimal for non-linear luminance transfer and closely related to (subjective) brightness contrast. Quality is also related to sharpness, which in turn depends on the non-linear transfer. Fortunately, in the neighbourhood of the optimum, quality is dominantly determined by brightness contrast. It will be shown that brightness contrast is not adequately characterized by the luminance contrast ratio, which is defined as the ratio of the luminance extremes. Alternative and more suitable contrast measures in terms of luminance are discussed.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jacques A. J. Roufs "Brightness Contrast And Sharpness, Interactive Factors In Perceptual Image Quality", Proc. SPIE 1077, Human Vision, Visual Processing, and Digital Display, (15 August 1989);

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