CGH Compressed and Transmitted and Reconstructed System with JPEG Baseline Processing and Fresnel Transforming Technique

抄録

A new CGH (Computer Generated Hologram) compressed and transmitted and reconstructed system (CCTRS) has been established in which JPEG baseline-encoding model and Fresnel transforming technique (FTT) have been adapted. This system can be applied in the remote signal processing using the digital filter of CGH. When the compression ratio is achieved to 1.5303%, the information of processed CGH can be effectively reconstructed using FTT. Moreover, in this system the size of image displayed is bigger (i.e., 18.07×18.07(cm²)), the system structure is simpler, the system costs lower than that using the electron holographic hardware display system, and can be widely applied by computer operators. In experiments, in terms of the holographic principle of E. N. Leith and J. Upatnieks, a CGH has been made with a computer, the information of processed CGH has been analyzed and the information distribution of processed CGH has been compared with the one of the original CGH. The reconstructed image quality of processed CGH has been discussed. Finally, Compression ratio (R), Mean squared error (MSE) and Peak signal to noise ratio (PSNR) have been precisely calculated and analyzed to evaluate the image quality of processed CGH and the reconstructed image quality of processed CGH. And the noise influence of the system for processed CGH has been analyzed and discussed in detail. In CGH compressed and transmitted, the reason has been carefully explained why the error problems can be caused as the pixel's amplitude and phase information of CGH varied. This method of processing CGH has been effectively verified by experiments.