A novel image compression algorithm by using Log-Exp transform

Author

Huang, Sheng-Chieh ; Chen, Liang-Gee ; Chang, Hao-Chieh

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

4

fYear

1999

fDate

36342

Firstpage

17

Abstract

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

Keywords

VLSI; data compression; image coding; transforms; Log-Exp transform; PSNR; compression ratio; exponential transform; image compression algorithm; image quality; logarithmic transform; still image compression; Computer networks; Image coding; Image quality; Multimedia systems; PSNR; Pixel; Transform coding; Video compression; Videoconference; World Wide Web;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.779932

Filename

779932