根据多项式矩阵的初等变换理论,把一种有理滤波器系数17/11双正交小波对应的DWT分解为提升步骤,极大地降低了计算复杂度.最后,将此提升小波变换应用于嵌入式图像编码.实验表明,其图像压缩性能显著超过JPEG2000标准中采用的9/7提升小波变换.
According to the theory on elementary transforms of polynomial matrix, the corresponding discrete wavelet "transform (DWT) of a kind of 17/11 biorthogonal wavelet with rational filter coefficients was factored into lifting steps, thereby the computational complexity was decreased remarkably. Finally, this lifting based DWT was applied to the em- bedded image coding, and simulations show that it exhibits image compression performance much superior to the lifting based 9/7 DWT used in JPEG 2000 standard.