图像数据压缩中的小波选择方法

A Method for Wavelet Selection in Image Data Compression

在图像信号的传输过程中，为了降低比特率，必须进行图像数据压缩．数字图像中的一种重要技术是子带编码，在子带编码中最重要的是正交镜象滤波器组的选择，而紧支的正交规范小波与完全重建的正交镜象滤波器组相对应．笔者提出一种用于信号最佳逼近正交小波的选择方法，即选择满足一定条件的滤波器的方法，采用小波压缩编码方法，实现高效的图像数据压缩方法．

During the transmission of image signals, image data must be compressed to reduce bit-rate.Subband coding is an important technique in digital compression while QMFB is the most important part in subband coding. And orthonormal bases of compactly supported wavelets correspond with QMFB. This paper proposes a method for the optimal approximate orthogonal wavelet selection.This is the choice of a filter which meets certain requirement by adopting wcvelet compression coding technique to achieve high-efficiency digital image compression.