Image Compression Using Wavelet Packet Tree
Chengyi Xiong · Modern Electronics Technique · 2006
The necessity in image compression continuously grows during the last decade,one of the most powerful and prespective approaches in this area is image compression using discrete wavelet transform.The image compression includes transform of image,quantization and encoding.This paper mainly describes the transform of image and quantization technique.The idea of wavelet packet tree is used to transform the still and colour images.This paper describes the new approach to construct the best tree on the basis of Shannon entropy.In addition,it proposes an adaptive thresholding for quantization.Compared with wavelet,the proposed algorithm provides a good compression performance.