Improvement of ghost imaging on orbital angular momentum by using JPEG & Linear block codes

Ghost imaging has attracted a lot of attentions recently, but the trade-off between the reliability and the transmitting rate becomes the biggest challenge for ghost imaging. In this paper, we present a method to improve the transmitting rate with the unchanged reliability for ghost-imaging system based on entanglement. In the scheme, we first encode the image by Joint Photographic Experts Group (JPEG) algorithm before transmitting an image, and then encode the JPEG bits stream using linear block codes to overcome the lossy information by compression. The transmitting rate can be enhanced by compression, and the reliability can be kept by linear block codes. By experiments, the results show that when the compression ratio of JPEG is beyond the coding efficiency of linear block codes, we can get some gains of the image with Peak Signal-to-Noise Ratio(PSNR) increase. Compared with direct transmission bit stream, our scheme can improve the PSNR 16dB, using 1.225 times of the transmission times.