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What is the most effective way to access cv::Mat elements in a loop?

I need to process cv::Mat elements and there is not special OpenCV function that performs my task. So I have to iterate the elements in loop. What is the more effective way of elementwise access? cv::Mat iterators, cv::Mat::at() method, maybe pointer arithmetic by hand or something else?

What is the most effective way to access cv::Mat elements in a loop?

I need to process cv::Mat elements and there is not special OpenCV function that performs my task. So I have to iterate the elements in loop. What is the more effective way of elementwise access? cv::Mat iterators, cv::Mat::at() method, maybe pointer arithmetic by hand or something else?

What is the most effective way to access cv::Mat elements in a loop?

I need to process cv::Mat elements and there is not special OpenCV function that performs my task. So I have to iterate the elements in loop. What is the more effective way of elementwise access? cv::Mat iterators, cv::Mat::at() method, maybe pointer arithmetic by hand or something else?