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Extraction of Representative Color of Digital Images Using Histogram of Hue Area and Non-Hue Area  

Kwak, Nae-Joung (Hanbat National University Dept. Electronic engineering)
Hwang, Jae-Ho (Hanbat National University Dept. Electronic engineering)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.47, no.2, 2010 , pp. 1-10 More about this Journal
Abstract
There have been studied with activity about color standard due to extention of digital contents' application area. Therefore the studies in relation to the standard are needed to represent image's feature as color. Also the methods to extract color's feature to be apt to various application are needed. In this paper, we set the base color as 50 colors from Munsell color system, get the color histogram to show the characteristics of colors's distribution of a image, and propose the method to extract representative colors from the histogram. Firstly, we convert a input image of RGB color space to a image of HSI color space and split the image into hue area and non-hue area. To split hue area and non-hue area, we use a fixed threshold and a perception-function of color area function to reflect the subjective vision of human-being. We compute histograms from each area and then make a total histogram from the histogram of hue area and the histogram of hue area, and extract the representative colors from the histogram. To evaluate the proposed method, we made 18 test images, applied conventional methods and proposed method to them Also the methods are applied to public images and the results are analyzed. The proposed method represents well the characteristics of the colors' distribution of images and piles up colors' frequency to representative colors. Therefore the representative colors can be applied to various applications
Keywords
color histogram; HSI color apace; Hue; representative colors;
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