2025/07/20 by Danilo Costarellı, Danilo Costarelli, Costarelli, Danilo +4 · 1 voice
Computer Science · Mathematics · #Cellular Automata and Applications #Markov Chains and Monte Carlo Methods #Generative Adversarial Networks and Image Synthesis
paper · pdf · doi:10.1007/s11222-026-10932-7
Abstract We propose using Probabilistic Cellular Automata (PCA) to address inverse problems with the Bayesian approach. In particular, we use PCA to sample from an approximation of the posterior distribution. The peculiar feature of PCA is their intrinsic parallel nature, which allows for a straightforward parallel implementation that allows the exploitation of parallel computing architecture in a natural and efficient manner. We compare the performance of the PCA method with the standard Gibbs sampler on an image denoising task in terms of Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity (SSIM). The numerical results and the large speedups obtained with this approach suggest that PCA-based algorithms are a promising alternative for Bayesian inference in high-dimensional inverse problems.