An efficient 2×2 Tchebichef moments for mobile image compression

Currently mobile digital image applications transmit a lot of images back and forth. Image compression is needed to reduce transmission payload at the expense of lower quality. At the same time, mobile devices are only expected to be equipped with lower computing power and storage. They need an efficient compression scheme especially for small images. The standard JPEG using discrete Cosine transform is a popular lossy image compression. Alternatively, this paper introduces 2×2 Tchebichef moments transform for the efficient image compression. In the previous research, larger sub-block discrete Tchebichef moments have been used extensively for image compression. The comparisons between JPEG compression and 2×2 Tchebichef moments image compressions shall be done. The preliminary experiment results show that 2×2 Tchebichef moments transform has the potential to easily perform better than JPEG image compression. The 2×2 Tchebichef moments provides an efficient and compact support for image compression.