Unfortunately, this may also lead to undesirable artifacts, and high computational complexity. These are conceptually similar to local HDR tone mapping methods,īecause they aim at preserving color contrasts by introducing chrominance information locally into the luminance channel. This analog multispectral technique can now be emulated digitally, and thisĪpproach to the problem can be considered as a global color-to-gray conversion.Īdditionally, local approaches to color-to-grayscale conversion have been proposed. Of the emulsion, and can be modified in an active way by selecting different filters to enhanceĪ specific part of the spectrum. In conventional black-and-white photography, gray tones are determined by the spectral sensitivity The other goal is therefore to reproduce maximum information from the original color image in the grayscale. Moreover, it is evident that some loss of information due to the conversion is inevitable. However, one may measure perceptual differences between colors in subjective psychophysical experiments. Unfortunately, no analogous conversion is naturally present in the human visual system (HVS). The aim of color-to-grayscale conversions is usually to produce perceptually plausible grayscale results. Of the three dimensional color data into one dimension. To that end, color-to-grayscale conversions basically perform a reduction We conduct both the subjective and objective comparisons of the methods using LDR and HDR benchmarks.īlack-and-white photography has not lost any of its artistic appeal despite the wide availability of color imaging processes.Īccordingly, the conversion from color to grayscale is an important piece of the computational photography puzzle.įurthermore, color images often have to be converted to grayscale for reproduction, or for subsequent processing. The goal of the project is an overview and evaluation of state-of the art color-to-grayscale imageĬonversions. EVALUATION OF COLOR-TO-GRAYSCALE CONVERSIONS Chief investigator: Martin Čadík, homepage: Project web page: Project description:
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