SelectChannel

#include <opencv2/highgui/highgui.hpp>
#include <opencv2/ml/ml.hpp>
#include <opencv2/imgproc/imgproc.hpp>

using namespace cv;


int main(int argc, char** argv) {

    printf("hhello!");
    Mat src = imread(argv[1]);
    Mat rgb = Mat(src.cols, src.rows, 8, 3);
    std::vector<Mat> splitedRgb = std::vector<Mat>();
    cvtColor(src, rgb, CV_BGR2RGB);
    split(rgb, splitedRgb);

    for (int y = 0; y < rgb.cols; y++) {
        for (int x = 0; x < rgb.rows; x++) {


                src.at<Vec3b>(x, y)[0] = 0;
                src.at<Vec3b>(x, y)[2] = 0;

        }
    }
    imwrite(argv[1], src);
}