A quadtree-partitioned mixture autoregressive generative model reduces MAP image denoising to variational lower bound maximization, optimized by alternating variational Bayes and exact gradient updates.
Denoising diffusion probabilistic models
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A Mixture Autoregressive Image Generative Model on Quadtree Regions for Gaussian Noise Removal via Variational Bayes and Gradient Methods
A quadtree-partitioned mixture autoregressive generative model reduces MAP image denoising to variational lower bound maximization, optimized by alternating variational Bayes and exact gradient updates.