Image compression algorithm based on integer wavelet transform
Huanyan Qian · Jisuanji gongcheng yu sheji · 2006
IWT is an image coding algorithm based on the integer wavelet transform by the lifting scheme.IWT is more efficient than conventional float-point wavelet transform and its operation is faster.In case of hardware implementation,integer based on arithmetic is much cheaper than those capable of handling floating points.In terms of memory usage,integer decomposition based on lifting scheme reduces the demands on the system by at least a factor two.For these reasons,the lossy image compression is considered.The image is firstly decomposed by the IWT based on lifting scheme,then coupled with modified EZW and adaptive range coder.Compared to Shaprio's EZW coder,the execution time of this algorithm is more than 1.5 times faster without degrading the performance.