Scan Based Lossless Image Compression Scheme

In this paper we propose a new loss less image compression method. The suggested method relies on novel selective scan process that aims to scan the image in the direction where minimal pixel intensity change is recorded. Such scan process would reduce high frequency data, in order to provide a smooth and high correlated mono-dimensional signal easy to compress. This scan process is followed by an adapted coding scheme based on DPCM and Huffman algorithms. The experimental results show a significant compression improvement of the suggested method as compared to two common loss less coders in the same class.