Gerchberg-Saxton phase retrieval algorithm

Example of Gerchberg-Saxton iterative phase retrieval algorithm.

Example of Gerchberg-Saxton (GS) iterative phase retrieval algorithm applied for reconstruction of the complex-valued wavefront distribution from two intensity images: real space image and diffraction pattern of a complex-valued sample. The sample amplitude is binary cat cartoon with maximum of 1, the sample phase is word "cat" with maximum of 0.1 radian.