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What happens if you swap i and j in the loop?

cv::Vec3b bgrPixel = lm.at<cv::Vec3b>(j, i);

What happens if you swap i and j in inside of the loop?loop body?

cv::Vec3b bgrPixel = lm.at<cv::Vec3b>(j, i);

What happens if you swap i and j inside of the loop body?

cv::Vec3b bgrPixel = lm.at<cv::Vec3b>(j, i);