An Efficient Lossless Image Compression Algorithm Using Lifting-DWT And Laplacian Pyramid

Abstract: The need for image compression has been increasing everyday as it can save the space needed to store and transmit the images in real time like medical applications. There are numerous techniques that have evolved till now but the one that combines simplicity, lesser loss and low memory requirements could bear higher potential. In this paper a lossless method of image compression using lifting-DWT and Laplacian pyramid is proposed. The image of size 342x390 is pre-processed and applied to lifting-DWT to generate level-1 LL band features. The Laplacian pyramid is used to generate LL band features to Laplacian level-1 features. The process is repeated for level-2 features.

Keywords: Lossless Compression; Pre-processing; Lifting DWT; Laplacian Pyramid; PSNR.