Title :
Lossless compression of LogLuv32 hdr images by simple bitplane coding
Author :
Kikuchi, Hiroaki ; Deguchi, Tadayoshi ; Okuda, Masumi
Author_Institution :
Dept. of Electr. & Electron. Eng., Niigata Univ., Niigata, Japan
Abstract :
A method of lossless compression of high dynamic range (HDR) images encoded in LogLuv32 format is presented. Simple bitplane coding (SBC) is independently applied to the components of LogLuv data. A context model for coding a bit is created by a comparison of neighboring pixel values, and is fed to a range coder. As a result, the average bit rate of 9.8 bits/pixel was obtained in lossless compression of popular 34 LogLuv32 HDR images. That is, a set of those data shrinks to 31% of the uncompressed data size on average.
Keywords :
data compression; image coding; LogLuv32 HDR images; SBC; bitplane coding; high dynamic range images; lossless compression; Bit rate; Context; Context modeling; Dynamic range; Encoding; Image coding; Indexes; High dynamic range image; bitplane coding; image compression; lossless compression;
Conference_Titel :
Picture Coding Symposium (PCS), 2013
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4799-0292-7
DOI :
10.1109/PCS.2013.6737734
