Lossless Compression of Light Fields Using Multi-reference Minimum Rate Predictors
João M. Santos, Pedro Assunção, Luís A. da Silva Cruz, Luis M. N. Tavora, Rui Fonseca-Pinto, Sérgio M. M. de Faria · 2019
This paper presents a method to improve the lossless compression efficiency of light field encoding based on Minimum Rate Predictors (MRP). The proposed method relies on the use of multiple references, either micro-images or sub-aperture images, to provide a richer set of correlated pixels for prediction. The results show better compression ratios than conventional versions of MRP, for both representation formats (micro-image and sub-aperture image arrays), achieving gains ranging from 16.9% to 21.2%. Furthermore, it is also shown that the proposed method consistently outperforms the state-of-the-art lossless encoders HEVC and JPEG-LS.