Abstract
The aim of the paper is to provide three enhancement methods for processing color images, including: RGB Histogram equalization, the method based on HSI and Multi-scale Retinex with color restoration (MSRCR). Firstly, we shall briefly introduce color image enhancement and related concept. Then, emphasis is placed on the principle of the three methods. Afterwards, we make comparison among the three methods. Finally, we can get a conclusion that: MSRCR greatly not only strengthens the details but also keep the color of the original image and acts more consistent with characteristics of human vision. However, it takes longer time. Simulation results provide a guidance and reference for the choice of color image enhancement methods.
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