0xkojiStep1 Install OpenCV via Homebrew
$ brew install opencv
$ brew install -v cmake
opencv 4.5.0_3 will be installed.
Step2 Set Header Search Paths
Build Settings > Search Header Search Paths
Add this to paths and select recursive
/usr/local/Cellar/opencv/4.5.0_3/include
Step3 Add .dylib to Link Binary With Libraries
Technically, you don't need to pass all .dylib, but in this case, I passed all .dylib under /usr/local/Cellar/opencv/4.5.0_3/lib.
Step 4 Build code
#include <opencv2/opencv.hpp>
#include <iostream>
using namespace cv;
int main(){
cv::Mat imMat(400,400, CV_8UC3);
for(int y = 0 ; y < imMat.rows; y++){
for(int x = 0 ; x < imMat.cols; x++){
cv::Vec3b &p = imMat.at<cv::Vec3b>( y, x);
p[0] = x;
p[1] = y;
p[2] = (int)((x+y)/2);
}
}
imshow("openCVTest",imMat);
waitKey(0);
return 0;
}
If you can build, you will see ↓
