An Efficient Lossless Compression Method Using Histogram Packing for HDR Images in OpenEXR Format

Taku ODAKA; Wannida SAE-TANG; Masaaki FUJIYOSHI; Hiroyuki KOBAYASHI; Masahiro IWAHASHI; Hitoshi KIYA

doi:10.1587/transfun.E97.A.2181

Special Section on Smart Multimedia & Communication Systems

An Efficient Lossless Compression Method Using Histogram Packing for HDR Images in OpenEXR Format

Taku ODAKA, Wannida SAE-TANG, Masaaki FUJIYOSHI, Hiroyuki KOBAYASHI, Masahiro IWAHASHI, Hitoshi KIYA

著者情報

キーワード: index transformation, coding, sparse histogram, PIZ, ZIP

ジャーナル認証あり

2014 年 E97.A 巻 11 号 p. 2181-2183

DOI https://doi.org/10.1587/transfun.E97.A.2181

詳細

抄録

This letter proposes an efficient lossless compression method for high dynamic range (HDR) images in OpenEXR format. The proposed method transforms an HDR image to an indexed image and packs the histogram of the indexed image. Finally the packed image is losslessly compressed by using any existing lossless compression algorithm such as JPEG 2000. Experimental results show that the proposed method reduces the bit rate of compressed OpenEXR images compared with equipped lossless compression methods of OpenEXR format.

責任著者(Corresponding author)

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