Color Systems and Color Image Enhancement Methods

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Vol 10, No 2 (2016) Cover
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DOI: https://doi.org/10.37936/ecti-cit.2016102.75141
Keywords:
Munsell Color System RGB Color Sys- tem HSI Color System Histogram Equalization Differential Histogram Equalization Color Image Enhancement Hue-preserving Processing

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Akira Taguchi
Department of Computer Science, Tokyo City University, Japan

Abstract

There are many color systems. Some systems are correspond to the human visual system, such as the Munsell color system. Other systems are formulated to ease data processing in machines, such as RGB color space. At first, Munsell color system is introduced in this paper. Next, RGB color system and hue-saturation-intensity (HSI) color system which is derived from RGB color systems are reviewed. HSI color system is important, because HSI color system is closely related to Munsell color system. We introduce the advantage and drawbacks of the conventional HSI color space. Furthermore, the improved HSI color system is introduced. The second half of this paper, we introduce a lot of color image enhancement methods based on the histogram equalization or the differential histogram equalization. Since hue preserving is necessary for color image processing, intensity processing methods by using both intensity and saturation in HSI color space are reviewed. Finally, hue preserving color image enhancement methods in RGB color system are explained.

Article Details

How to Cite
[1]
A. Taguchi, “Color Systems and Color Image Enhancement Methods”, ECTI-CIT Transactions, vol. 10, no. 2, pp. 97–110, Jan. 2017.
Issue
Vol. 10 No. 2 (2016): ECTI Transaction on CIT (Nov 2016)
Section
Invited Article

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