说明：  利用颜色直方图的最大值提取彩色图像的主色调，用主色调逼近彩色图像的颜色，观察彩色图像颜色逼近的效果
(Extract the maximum value of the use of color histogram color image' s main colors, with the primary colors close to the color of color images to observe the effect of color image color approximation)