Pixel-Wise Noise Level Estimation for Images

Abstract

The purpose of this study is to estimate the noise level of every pixel in a single noisy image, that is superimposed independent and non-identically distributed random variables with normal distribution. The method makes a set of similar pixels in the local region to the interest pixel using the approximate function of noise variance, and estimates with regard to the noise level. As the results show, the proposed method is effective in estimation of noise level of every pixel for any images.