Fig. 4: Phase retrieval with a large-scale sample vector using the gain-based system.
From: Phase retrieval via gain-based photonic XY-Hamiltonian optimization
a A 180 × 180 pixel grayscale image downsampled from the “astronaut” image of the “scikit-image” Python image dataset package52. This image is used as the sample vector in a CDP-based phase-retrieval setup with 8 phase filters, yielding an observation vector b of length 259,200. b The final reconstruction after the gain-based system evolves for t = 5 from a random initial condition. The resulting RSE is −9.4 and the ROE is −12.
