Suppressing defocus noise with U-net in optical scanning holography

Optical scanning holography (OSH) records both the amplitude and phase information of a 3D object by 2D scan. To reconstruct volumetric image from an OSH hologram is difficult, as it suffers defocus noise other sections. The use random pupil can convert into speckle-like noise, which may require further processing in sectional reconstruction. In this paper, we propose U-shaped neural network to reduce speckle haze. Simulation results show that proposed method works effectively efficiently simple complex graphics.