2Golner M A, Mikhael W B, Krishnan V. Region Based Varia- ble Quantization for JPEG Image Compression [ C ]// Pro-ceedings of 43rd IEEE Midwest Symp on Circuits and Sys- tem. Piscataway : IEEE ,2000:604 - 607.
3Chang L W,Wang C Y, Lee S M. Designing JPEG Quanti- zation Tables Based on Human Visual System [ C ]// Pro- ceedings of 1999 International Conference on Image Pro- cessing. Piscataway : IEEE, 1999:376 - 380.