| 摘要 |
Systems and methods of denoising images (12) are described. In one aspect, spatially-shifted forward transforms (C1, C2, ..., Ck) of an input image (62) are computed. Each forward transform (C1, C2, ..., Ck) is computed based on a denoiser transform Z having an associated transpose Z', wherein a matrix multiplication between Z and Z'produces a diagonal matrix Lambda, Z = F(D), F specifies a mapping from coefficients of D to coefficients of Z, and D substantially corresponds to a frequency-domain transform. The forward transforms (C1, C2, ..., Ck) are denoised based on nonlinear mappings derived from quantization values linked to the input image (62). Spatially-shifted inverse transforms (C'1, C'2, ..., C'k) of the denoised forward transforms are computed. Each inverse transform (C'1, C'2, ..., C'k) is computed based on Z and Z'. An output image (40) is computed based on a combination of spatially-shifted inverse transforms (C'1, C'2, ..., C'k). |
