Contrast enhancement of an image can efficiently be performed by histogram equalization. However, the global histogram equalization will cause an effect on brightness saturation in some almost homogeneous area. Therefore, multipeak histogram equalization has been proposed. Each detected peak of the histogram is independently equalized. The effect of brightness saturation can be eliminated and the perceptibility improved. By using the histogram equalization method, the output image can preserve the mean value brightness of the input image.
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Wongsritong et al. (2002) studied this question.
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