一种新97小波改进的JPEG2000算法

针对有限网络带宽下视频监控的实时性要求,提出了一种改进的JPEG2000图像压缩传输算法。该改进算法以构造双正交小波的Cohen-Daubechies-Feauveau定理和消失矩条件为基础,首先依据提升结构构造了一组对称的双正交97小波;然后用新构造的97小波取代JPEG2000标准中的CDF97小波,该新97小波算法不仅比CDF97小波的计算处理速度更快,而且在保持几乎相同的压缩性能的同时,能够大大简化图像压缩中的运算量;最后,通过将改进的算法应用于网络机器人视频监控系统的实验表明,该算法是可行的。

Improved JPEG2000 Algorithm Using a Novel 97 Wavelet

An improved JPEG2000 algorithm is proposed to meet the realtime requirements of video supervisory system under the limited bandwidth. Firstly, a novel symmetric biorthogonal 97 wavelet is constructed based on the Cohen-Daubechies-Feauveau Theorem, vanishing moments condition and the lifting scheme. Then the constructed 97 wavelet is introduced to substitute CDF97 wavelet of JPEG2000 algorithm in order to improve JPEG2000 performance. Compared with traditional CDF97, the new 97 wavelet has a faster processing performance for its remarkably less computational complexity of image compression, while the compression performance is almost the same as that of CDF97 wavelet. At last, the experimental results of applying the proposed algorithm in a video surveillance system validate the predominance.