Fig. 2: Physics-aware encoding method.
From: Photonic diffractive generators through sampling noises from scattering media
A Schematic graph of physics-aware encoding. A digital VAE is tuned in advance upon certain dataset. The encoder of the trained VAE first maps images to two-dimension latent space which corresponds to real-world illumination position (x, y). B Position-dependent speckles. Left: typical speckle intensity profile. Right: statistical histogram. The intensity of generated speckles follows Rayleigh distribution. C, D The encoding results for input images (C) and output speckle (D) are illustrated. E Training logs of PDG for two enconding strategies. Both of them are trained under the same environment and hyperparameters. Inset plot: one typical PDG output '0' and '9' for different methods.
