OpenCV convert image color


int main() {

cv::Mat src = cv::imread(IMG_PATH);
cv::imshow("Original", src);
int i, j;
int cPointR, cPointG, cPointB, cPoint;//currentPoint;
for (i = 1; i < src.rows; i++)
for (j = 1; j < src.cols; j++)
{
cPointB = src.at<cv::Vec3b>(i, j)[0];
cPointG = src.at<cv::Vec3b>(i, j)[1];
cPointR = src.at<cv::Vec3b>(i, j)[2];
if (cPointB > 100 & cPointR < 100 & cPointG < 100)
{
src.at<cv::Vec3b>(i, j)[0] = 0;
src.at<cv::Vec3b>(i, j)[1] = 0;
src.at<cv::Vec3b>(i, j)[2] = 2000;
}

}
cv::imshow("Convet", src);
cv::waitKey(0);

return 0;
}