New simple and efficient color space transformations for lossless image compression

作者：Starosolski Roman^*

来源：Journal of Visual Communication and Image Representation, 2014, 25(5): 1056-1063.

DOI：10.1016/j.jvcir.2014.03.003

• Reversible color space transformation
• Lossless image compression
• Human vision system
• Image coding
• RCT
• YCoCg-R
• Karhunen-Loeve transformation
• JPEG-LS
• JPEG2000
• JPEG XR

We present simple color space transformations for lossless image compression and compare them with established transformations including RCT, YCoCg-R and with the optimal KLT for 3 sets of test images and for significantly different compression algorithms: JPEG-LS, JPEG2000 and JPEG XR. One of the transformations, RDgDb, which requires just 2 integer subtractions per image pixel, on average results in the best ratios for JPEG2000 and JPEG XR, while for a specific set or in case of JPEG-LS its compression ratios are either the best or within 0.1 bpp from the best. The overall best ratios were obtained with JPEG-LS and the modular-arithmetic variant of RDgDb (mRDgDb). Another transformation (LDgEb), based on analog transformations in human vision system, is with respect to complexity and average ratios better than RCT and YCoCg-R, although worse than RDgDb; for one of the sets it obtains the best ratios.

• 出版日期2014-7