OpenCV: Taking a 3 channel RGB image, splitting channels and viewing an image with only R+G

Question

I wanted to look at only the R+G channels in an RGB image because I get better contrasts to detect an object when the Blue channel is removed. I used OpenCV to split the cha

Answer 1

another way is subtracting Scalar(255,0,0) from source image

#include 
using namespace cv;

int main(int argc, char **argv)
{
    Mat src = imread(argv[1], CV_LOAD_IMAGE_COLOR);
    imshow("src", src );
    src -= Scalar(255,0,0);
    imshow("Green and Red channels", src );
    waitKey();
    return 0;
}