Imaging through scattering layers by exploiting the sum of gradient amplitude guided phase retrieval

Abstract

One way to restore scattered optical imaging is retrieving its phase through the speckle autocorrelation. However, the commonly used methods have the disadvantages such as poor recovery quality, the need to select the initial value multiple times and insufficient noise immunity. A method named imaging through scattering layers by exploiting the sum of gradient amplitude guided phase retrieval is proposed in this paper. Sparsity enhancement operation is added to the solution obtained in each iteration and a value called the sum of gradient amplitudes is used to control the number of iterations. This method can effectively improve the quality of restored images. It can also effectively recover the object with any initial iteration value and have better noise resistance by a specific designed parameter in the iteration.