Improved Quantify and Irregular JPEG Image Coding Algorithm
Chao Chen, Wang Yao-ming · Journal of Shanghai Dianji University · 2007
JPEG is the international standard of the still image data compression.Based on the deficiency of DCT transform in JPEG,an auto adaptation quantization algorithm is proposed in the paper.Based on the visible quantization noise of JPEG image in the high frequency regions,a Fractal Image Coding algorithm is also introdued in the paper. Through the simulation on PC,compare with the standard JPEG,the proposed method has a higher psnr and quality with the same compression ratio.The proposed method has some value and practicality.