Image Compression using DWT Interpolation Technique

Human Vision interpolation phenomenon at optimum computational load. Image can be zoomed in or zoomed out using various interpolation techniques. Here, Lifting Scheme is used as a tool to increase/decrease image size, even though image is not of size 2n x 2n where n is an integer. Zero padding technique is used for images those are not of size 2n x 2n dimensions. Any variable size reduction/magnification of an image can be computed using the proposed lifting scheme. For this, piecewise application of Lifting Scheme based DWT is presented. With the advent of satellites, which are having higher resolutions, the compression of image has become a necessity to reduce mass meet the bandwidth requirement. The wavelet transform has emerged as a cutting edge technology, in the field of image compression. Wavelet-based coding provides substantial improvements in picture quality at higher compression ratios.