Reconstruction of polarization images from a multimode light-field imaging system

The multimode light-field camera can capture spatial location and spectral and polarization characteristics of a target simultaneously. There is an aliasing effect, which causes the directly extracted image of a certain filter to include information from other filters. The reconstruction method proposed by Li (Jingzhen Li, thesis of Beihang University, 2015) can improve the accuracy of the polarization images, but the gray values still have gradient variations. In this paper, a method for reconstructing polarization images from the light-field image is proposed along with an aliasing model. Compared with the conventional direct-extraction and Li's methods, the proposed method can greatly reduce energy loss, and the accuracy of the reconstructed image increases more than fivefold.