HSV 通道分离

// 转换成hsv 
	cv::Mat img_h, img_s, img_v, imghsv;
	std::vector<cv::Mat> hsv_vec;
	cv::cvtColor(srcImage, imghsv, CV_BGR2HSV);
	cv::imshow("hsv", imghsv);
	cv::waitKey(0);
	// 分割hsv通道
	cv::split(imghsv, hsv_vec);
	img_h = hsv_vec[0];
	img_s = hsv_vec[1];
	img_v = hsv_vec[2];
	img_h.convertTo(img_h, CV_32F);
	img_s.convertTo(img_s, CV_32F);
	img_v.convertTo(img_v, CV_32F);
	double max_s, max_h, max_v;
	cv::minMaxIdx(img_h, 0, &max_h);
	cv::minMaxIdx(img_s, 0, &max_s);
	cv::minMaxIdx(img_v, 0, &max_v);
	// 各个通道归一化
	img_h /= max_h;
	img_s /= max_s;
	img_v /= max_v;

转载：http://blog.youkuaiyun.com/zhuwei1988