主函数Mat::at<_Tp>
| Params | |
|---|---|
| row: | Index along the dimension 0 |
| col: | Index along the dimension 1 |
Mat img = imread("E:\20210416_145345_10000.jpg", 0);
threshold(img, img, 200, 255, ADAPTIVE_THRESH_GAUSSIAN_C);
cvtColor(img, img, COLOR_GRAY2BGR);
for (int i = 0; i < img.rows; ++i)
{
for (int j = 0; j < img.cols; ++j)
{
const int c_point_b = img.at<Vec3b>(i, j)[0];//蓝
const int c_point_g = img.at<Vec3b>(i, j)[1];//绿
const int c_point_r = img.at<Vec3b>(i, j)[2];//红
if (c_point_b < 100 & c_point_r < 100 & c_point_g < 100)
{
img.at<Vec3b>(i, j)[0] = 255;
img.at<Vec3b>(i, j)[1] = 0;
img.at<Vec3b>(i, j)[2] = 0;
}
}
}
imshow("img", img);
waitKey(0);
效果图
