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A novel image compression algorithm by using Log-Exp transform

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3 Author(s)
Sheng-Chieh Huang ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Liang-Gee Chen ; Hao-Chieh Chang

Based on the logarithmic and exponential transform, an efficient Log-Exp still image compression system is proposed. The Log-Exp compression is designed for the high quality still image, especially for the PSNR above 36. At similar image quality (Log-Exp PSNR=41.52 and JPEG PSNR=41.23), the Log-Exp compression can get a higher compression ratio than JPEG by a factor of1.84 times for the benchmark image Lena. Besides, the Log-Exp compression is computed in pixel-by-pixel without the block artifacts. In comparison with the JPEG compression result (bpp=0.99. PSNR=26.9), the Log-Exp compression uses less bpp (bpp=0.87) to get higher image quality (PSNR=36.38) for the benchmark image baboon

Published in:

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on  (Volume:4 )

Date of Conference:

Jul 1999