Noise estimation for images using polynomial relationship for pixel values of image features

摘要

Implementations relate to estimating noise in images using a polynomial relationship for pixel values of image features. In some implementations, a computer-implemented method to estimate noise in an image includes determining a plurality of patches of pixels in the image. For each patch of pixels, the method determines feature pixels in the patch that are included in a particular image feature at least partially depicted in the patch. The method determines an error estimate for each patch of pixels, where each error estimate is based on an amount by which pixel values of the feature pixels in the patch of pixels are different from an estimated polynomial relationship between the feature pixels in the patch of pixels. One of the error estimates is selected as a noise level estimate for the image.