Patent ID: 9071733
Filing Date: 2015-06-30
Classification: G06T,H04N

Abstract:
1. A method for reducing noise in an image/video frame, comprising: receiving an input image/video frame and a corresponding noise level η; determining a structure-under-noise estimator ρ as a function of a ratio between the noise level η and a structure measure parameter for the input image/video frame; determining a number of iterations N and a time step parameter λ from the structure-under-noise estimator ρ; determining a stopping time parameter T from the number of iterations N and the time step parameter λ; determining an edge strength parameter σ from the time step parameter λ, the noise level η, and the stopping time parameter T using: denoising the input image/video frame by applying anisotropic diffusion thereto using the edge strength parameter σ, the time step parameter λ, and the number of iterations N, thereby obtaining a denoised image; and outputting the denoised image.