本程序基于opencv可以提取图片的颜色直方图特征，可用于图像检索中作为颜色特征-This procedure is based on opencv can extract the image color histogram features, can be used as color features in image retrieval

统计一幅图像的颜色直方图特征，用于进行图像检索的一中方法。-Color histogram statistics of an image, for performing a method for image retri .