Enhancement of multichannel signals by histogram modification

While histogram modification has traditionally been used for the enhancement of color images, it has usually been restricted to processing the luminance component. In the case of the RGB color space, we perform the independent histogram equalization of the R, G, and B components. However, these methods can't use the full color space. Several RGB histogram explosion algorithms are proposed. The histogram decimation (HD) method is also one of the RGB histogram explosion algorithms. We point out the defects of the HD method and propose the modified HD method, in order to conquer the defects of the HD method.