Extending AV1 Codec to Enhance Quality in Phase Compression of Digital Holograms in Object and Hologram Planes

Abstract

Holography is a 3D capturing and displaying system. Many formats have been suggested to store holographic images with the highest quality and minimum file size. Here, we suggest combining two AV1 codecs to make a secondary error image and use it in a linear regression block to compensate for the main AV1 compression error. Since the phase part is the most challenging part of holograms, the proposed method addresses the compression problem in phase. The obtained results reveal that the proposed method can outperform the state-of-the-art codecs in terms of PSNR and SSIM criteria. Besides, comparing BD-PSNR and BD-Rate results with usual AV1, confirms the proposed method has an average about 5.04dB, which is -22.1% better Object plane performance, and 4.57dB, which is -20.66% better in Holo plane performance, in terms of BDPSNR and BD-Rate, respectively.