Extension of JPEG XS for Two-Layer Lossless Coding

TL;DR

This paper introduces a two-layer lossless image coding method compatible with JPEG XS, enabling lossless restoration while preserving the standard's low latency and complexity features.

Contribution

It extends JPEG XS to support lossless coding through a two-layer structure similar to JPEG XT, which was not previously available.

Findings

Achieves lossless image restoration with JPEG XS compatibility

Maintains low latency and low complexity characteristics

Extends JPEG XS standard for lossless coding

Abstract

A two-layer lossless image coding method compatible with JPEG XS is proposed. JPEG XS is a new international standard for still image coding that has the characteristics of very low latency and very low complexity. However, it does not support lossless coding, although it can achieve visual lossless coding. The proposed method has a two-layer structure similar to JPEG XT, which consists of JPEG XS coding and a lossless coding method. As a result, it enables us to losslessly restore original images, while maintaining compatibility with JPEG XS.