Statistical Modeling of the Patches DC Component for Low-Frequency Noise Reduction

This work is devoted to patch-based image denoising. Assuming an additive white Gaussian noise (AWGN) on patches, we derive corresponding models on centered patches and on their DC components. Then we propose a strategy for improving a given path-based denoiser. Finally, we provide experiments with the recent denoising method HDMI that shows improvement of the denoising quality, particularly for residual low frequency noise.