scholarly journals RGB Color Cube-Based Histogram Specification for Hue-Preserving Color Image Enhancement

2017 ◽  
Vol 3 (3) ◽  
pp. 24 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Image Enhancement ◽  
Color Image ◽  
Color Image Enhancement ◽  
Histogram Specification

scholarly journals Hue-Preserving Saturation Improvement in RGB Color Cube

2021 ◽  
Vol 7 (8) ◽  
pp. 150
Author(s):  
Kohei Inoue ◽  
Minyao Jiang ◽  
Kenji Hara
Keyword(s):  
Image Enhancement ◽  
Color Image ◽  
Color Space ◽  
Histogram Equalization ◽  
Experimental Results ◽  
Color Image Enhancement ◽  
Histogram Specification ◽  
Target Intensity ◽  
Rgb Color Space ◽  
Intensity Image

This paper proposes a method for improving saturation in the context of hue-preserving color image enhancement. The proposed method handles colors in an RGB color space, which has the form of a cube, and enhances the contrast of a given image by histogram manipulation, such as histogram equalization and histogram specification, of the intensity image. Then, the color corresponding to a target intensity is determined in a hue-preserving manner, where a gamut problem should be taken into account. We first project any color onto a surface in the RGB color space, which bisects the RGB color cube, to increase the saturation without a gamut problem. Then, we adjust the intensity of the saturation-enhanced color to the target intensity given by the histogram manipulation. The experimental results demonstrate that the proposed method achieves higher saturation than that given by related methods for hue-preserving color image enhancement.

Color image enhancement with brightness preservation using a histogram specification approach

Optik ◽  
2015 ◽  
Vol 126 (24) ◽  
pp. 5656-5664 ◽  
Author(s):  
G. Jiang ◽  
S.C.F. Lin ◽  
C.Y. Wong ◽  
M.A. Rahman ◽  
T.R. Ren ◽  
...  
Keyword(s):  
Image Enhancement ◽  
Color Image ◽  
Brightness Preservation ◽  
Color Image Enhancement ◽  
Histogram Specification
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