中文说明：
基于内容的图像检索主颜色直方图的提取，从图像的获取到直方图现实到特征的提取，最后根据图像检索出与所给图像最相似的图像。
English Description：
The extraction of main color histogram in content-based image retrieval, from image acquisition to histogram reality to feature extraction, and finally retrieve the image most similar to the given image according to the image