Efficient lossless coding of highpass bands from block-based motion compensated wavelet lifting using JPEG 2000

TL;DR

This paper introduces an invertible extension to JPEG 2000 that improves lossless coding efficiency of highpass bands in wavelet-lifted, block-based motion-compensated images, especially relevant for medical imaging volumes.

Contribution

It presents a novel invertible extension to JPEG 2000 tailored for lossless coding of highpass bands in wavelet-lifted images with motion compensation.

Findings

Reduces filesize by 0.8% on average

Achieves peak rate savings of 1.1%

Enhances lossless coding efficiency for medical image volumes

Abstract

Lossless image coding is a crucial task especially in the medical area, e.g., for volumes from Computed Tomography or Magnetic Resonance Tomography. Besides lossless coding, compensated wavelet lifting offers a scalable representation of such huge volumes. While compensation methods increase the details in the lowpass band, they also vary the characteristics of the wavelet coefficients, so an adaption of the coefficient coder should be considered. We propose a simple invertible extension for JPEG 2000 that can reduce the filesize for lossless coding of the highpass band by 0.8% on average with peak rate saving of 1.1%.