Apply a function to each pixel in the image.

Question

Is there a method in OpenCV that takes an input matrix, an output matrix, and a function and applies this function to each pixel? For example, a function like "check the pixel value, if it is below a certain threshold, set the value to 0, otherwise save the value"

I know that I can iterate over the pixels of the matrix and apply this function myself, it's just interesting if there is a function that would save me from this job.

Answer 1

If performance is a problem, the following links may interest you:

• How to scan images
• LUT Function Documentation

LUT, .

Answer 2

- ( ):

std::for_each(mat.begin<uchar>(), mat.end<uchar>()
              , [](uchar& pixel) {  
                     /* do something with pixel */ 
                });

.

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: remap, .