Gray Image Compression Based on Rectangle NAM and PDE
Yongliang Lu · Journal of Chinese Computer Systems · 2010
Based on Rectangle NAM and PDE,a new compression method for gray image is proposed.On the encoder,the original image is segmented into a number of rectangular sub-block,and the method of coordinate compression is used for storaging location and size of sub-block.On the decoder,a PDE method is applied to reconstruct the image,which is effective to reduce block-effect.The time complexity is,n is the number of Gray-scale image pixels.Experiments show that the proposed approach can reduce the number of rectangular sub-block and has a higher compression ratio on the premise of remaining the image quality,which has a potential in application.