Lossless Coding of HDR Color Images in a Floating Point Format Using Block-Adaptive Inter-Color Prediction

Yuya KAMATAKI; Yusuke KAMEDA; Yasuyo KITA; Ichiro MATSUDA; Susumu ITOH

doi:10.1587/transinf.2021PCL0002

Special Section on Picture Coding and Image Media Processing

Lossless Coding of HDR Color Images in a Floating Point Format Using Block-Adaptive Inter-Color Prediction

Yuya KAMATAKI, Yusuke KAMEDA, Yasuyo KITA, Ichiro MATSUDA, Susumu ITOH

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Keywords: lossless coding, HDR color image, Radiance RGBE format, block-adaptive inter-color prediction

JOURNAL FREE ACCESS

2021 Volume E104.D Issue 10 Pages 1572-1575

DOI https://doi.org/10.1587/transinf.2021PCL0002

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Abstract

This paper proposes a lossless coding method for HDR color images stored in a floating point format called Radiance RGBE. In this method, three mantissa and a common exponent parts, each of which is represented in 8-bit depth, are encoded using the block-adaptive prediction technique with some modifications considering the data structure.

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