Abstract
In this paper, we propose a new algorithm for lossless image compression. Ithas two stages. The first stage transform the images into waveletcoefficients with integer wavelet transform. It decomposes the image intoseveral subbands and reduce its entropy. The second stage is to code thewavelet coefficients with arithmetic coding. In order to improve the codingefficiency, we also takes advantage of quadtree segmentation. If the bitrates of a block of the wavelet coefficients after the arithmetic coding isgreater than the sum of the bit rates of its four sub-blocks after thearithmetic, the block is split into four sub-blocks as quadtreesegmentation; otherwise, it is not split. Our simulation results show thatour proposed algorithm outperforms the JPEG lossless coding, but is slightlyinferior to the S+P transform.