Low complexity light field compression based on pseudo-temporal circular sequencing

Abstract

Light fields are gaining more impact in today's filming technology due to post-processing possibilities such as software refocus, perspective shift, reconstruct 3D images, and depth scaling. Light fields are captured light rays at every point in space travelling in every direction, therefore a large amount of data is recorded for representation. For exchange, broadcast and storing of such imagery data, we lack efficient compression techniques. This paper proposes a light field compression approach based on low-complexity preprocessing by pseudo-temporal sequencing frames suitable for state-of-the-art codecs. An efficient novel approach of circular reordering is introduced where the redundancy between frames is maximized and exploited by low-delay HEVC predictive coding. Experimental results showcase a consistent increase in both PSNR and SSIM for several light fields and outperforms available schemes with pseudo-temporal sequencing using HEVC. An increase upto 1 dB gain compared to state-of-the-art reordering techniques using HEVC is achieved.