Enhancement of Color Images Based on Histogram Equalization with Variable Enhancement Degree

Abstract

The YCbCr. color space is suitable for image compression and adopted for JPEG and MPEG. The YCbCr color space is related with the HSI (hue, saturation, intensity) color space. The HSI color space is an ideal tool for developing image processing. In this paper, we propose a color image enhancement method, which is combined the intensity enhancement and the saturation enhancement, in the YCbCr color space. Even if the width and shape of (Cb,Cr) space is changed depending on the value of Y component, the proposed method is free from gamut problem. Furthermore, in the proposed method, the saturation enhancement degree can be altered to suit users' own preference.APSIPA ASC 2009: Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference. 4-7 October 2009. Sapporo, Japan. Oral session: Intelligent Systems for Multimedia Signal Processing (6 October 2009)