Images Compression Using Dual Tree Complex Wavelet Transform
In this paper, a new image compression algrithm that is based on DT-CWT and SPIHT is presented. Approximate shift invariance, good directional selectivity, computational efficiency properties of DT-CWT make it a good candidate for image compression. A modified SPIHT algorithmic, named as simple SPIHT, is introduced in order to increase its efficiency for image compression. The proposed simple SPIHT algorithms, which is based on not only the relationship between the bit-planes and the target bit-rate but also the relationship between the initial threshold and the target bit-rate, can effectively reduce the computation time and required memory space. Experimental results show that the proposed image compression method is efficient, in terms of compression performance.
discrete wavelet transform SPIHT dual tree complex wavelet transform PSNR
Li Hui Fang Miao Guo Feng Xu Hou Jie
School of Electronic Information Northwestern Polytechnical University Xian 710072 Shaanxi ,China
国际会议
西安
英文
559-562
2010-08-07(万方平台首次上网日期,不代表论文的发表时间)