opencv HSV空间提取图像中红色

本文主要参考https://blog.csdn.net/zdyueguanyun/article/details/50739374

                     https://blog.csdn.net/liumoude6/article/details/78318053

结合这两篇文章以及自己的一点思考，提取图像中的红色并把其它部分都置为白色代码如下：

void colorFilter(Mat srcImage, Mat &outImage)
{
	Mat srcImage_hsv;
	cvtColor(srcImage, srcImage_hsv,CV_BGR2HSV);
	//imwrite("E:\\img_compare\\多印章图片\\印章\\31\\hsv.jpg", srcImage_hsv);

	int nl = srcImage.rows;
	int nc = srcImage.cols;

	for (int m = 0; m < nl; m++)
	{

		for (int n = 0; n < nc; n++)
		{
			//&& (srcImage_hsv.at<Vec3b>(m, n)[1]>43)
			//以下代码是提取红色部分
			if (!((((srcImage_hsv.at<Vec3b>(m, n)[0] >= 0) && (srcImage_hsv.at<Vec3b>(m, n)[0] <= 15)) || (srcImage_hsv.at<Vec3b>(m, n)[0] >= 125) && (srcImage_hsv.at<Vec3b>(m, n)[0] <= 180)) && (srcImage_hsv.at<Vec3b>(m, n)[2]>=46) && (srcImage_hsv.at<Vec3b>(m, n)[1]>=43)))			
			
			{
				srcImage.at<Vec3b>(m, n)[0] = 255;
				srcImage.at<Vec3b>(m, n)[1] = 255;
				srcImage.at<Vec3b>(m, n)[2] = 255;
			}
			
		}
		
	}
	outImage = srcImage.clone();
}

使用该代码对下图（图源来自网络）处理

其结果为：

文中若有错误或不妥之处，还望指出，以便共同学习！