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An improved color image enhancement algorithm based on MSR was proposed in this paper. The appropriate wavelet bases were selected to decompose the input image into three levels. Then different enhancement algorithms were employed to process the decomposed wavelet coefficients and scale coefficients. For the wavelet coefficients, after the analyzing of each level??s characters, a modified adaptive...
A novel color image enhancement algorithm based on global histogram equalization (HE) was proposed, considering that global histogram equalization is easy to produce color distortion when color images are enhanced. Firstly each component of original RGB image is implemented global histogram equalization separately. Secondly original RGB image and equalized RGB image are all executed wavelet transform,...
In this paper, we propose a novel color image enhancement algorithm using two gamma-rescaling curves and a multi-scale Gaussian matrix (MSGM). Histogram extension is adopted for each color channel respectively as a preprocessing step. After HSI color space conversion, two gamma-rescaling curves are applied to the intensity component for balancing the brightness of the original image. The multi-scale...
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