How to calculate the standard deviation of noise for an image?
I would try to pursue this by taking the image before denoise and applying a bitwise_and to it from the denoised image. This would give you just the noise. Then you could take the standard deviation and compare between the denoising algorithms.
I'm currently testing out various denoising algorithms on noisy images. Is there a way of measuring the standard deviation of the noise in the images that I'm denoising (before and after) with OpenCV(python) or any easier method?