A Heuristic Decoding Method for Coded Images of Random Uniformly Redundant Array

The URA is one of the coded aperture imaging techniques. It has been used or proposed for X-ray imaging. In the URA, the pinhole is replaced by multi-pinholes array arranged in m-sequences. The pattern of the array is set as its correlation between the multi-pinholes and the decoding operator must be the delta function. So the URA can provide a two-dimensional image with a high resolution and high SN ratio. But the optical efficiency of the URA camera is restricted due to decoding operator. Therefore the optical efficiency is not enough to imaging the X-ray of the inertial confinement research in some cases. In the proposed method, a heuristic method is used for the decoding and does not need the decoding operator. Therefore, we can set the pattern of the array to increase the optical efficiency. Simulation results show that the proposed method can improve the optical efficiency.