研究了多尺度三元小波紧框架滤波器的构造。根据框架多分辨分析与相应的尺度函数的滤波器函数所满足的不等式,运用时频分析方法,给出多尺度三元小波紧框架存在的充分条件,进而提供多尺度三元小波紧框架的滤波器的构造方法。
Construction for the filter banks of three-dimensional multi-scale tight wavelet frames was studied.Firstly,according to the frame multiresolution analysis and the inequality of the filter function associated with the scaling function,the sufficient condition for the existence of three-dimensional multi-scale tight wavelet frames was provided by using time-frequency analysis method. Secondly,the constructive method for the filter banks for three-dimensional tight wavelet frames were formulated.