Title :
A Heuristic Decoding Method for Coded Images of Random Uniformly Redundant Array
Author :
Nozaki, Shinya ; Fujioka, Shinsuke ; Ueda, Tatsuki ; Chen, Yen-wei ; Namihira, Yoshinori
Author_Institution :
Transdisplinary Res. Organ. for Subtropics & Island Studies, Univ. of the Ryukyus, Nishihara, Japan
Abstract :
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.
Keywords :
X-ray imaging; decoding; image coding; image reconstruction; image resolution; image sequences; random processes; simulated annealing; 2D image resolution; URA camera; URA reconstruction; X-ray imaging; coded aperture imaging technique; delta function; heuristic decoding operator method; m-sequence; multipinhole array arranged; optical efficiency; random uniformly redundant array; simulated annealing; Apertures; Cameras; Decoding; High-resolution imaging; Image resolution; Inertial confinement; Optical arrays; Optical imaging; Tin; X-ray imaging;
Conference_Titel :
Intelligent Information Hiding and Multimedia Signal Processing, 2009. IIH-MSP '09. Fifth International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4244-4717-6
Electronic_ISBN :
978-0-7695-3762-7
DOI :
10.1109/IIH-MSP.2009.284
