opencv - color

#include <opencv2/opencv.hpp>

void remove_red(cv::Mat src)
{
	int width = src.cols;
	int height = src.rows;
	int ws = src.step1();

	unsigned char* data = src.data;

	for (int y = 0; y < height; y++)
	{
		unsigned char* row = data + y * ws;
		for (int x = 0; x < width; x++)
		{
			unsigned char* px = row + x * 3;
			px[2] = 0;
		}
	}
}

int main()
{
	cv::Mat mat = cv::imread("image.jpg");
	remove_red(mat);
	cv::imshow("remove_red", mat);
	cv::waitKey(0);
}