legall_5x3.wvf

来自「小波压缩编码平台软件包」· WVF 代码 · 共 35 行

%LeGall_5x3 
%
% H = (-1/2*x(-1) + x(0) - 1/2*x(1)) * (1 / sqrt(2))
% L = (-1/8*x(-2) + 1/4*x(-1) + 3/4*x(0) + 1/4*x(1) - 1/8*x(2)) * sqrt(2)
%    
% Prediction    -> y(0)' = y(0) - 0.5 * (x(-1) + x(1))
% Update        -> x(0)' = x(0) + 0.25 * (y(-1)' + y(1)')
% Normalisation -> H  = y' * (1 / sqrt(2))
%                  L  = x' *  sqrt(2)

%wvf_type
 SYMMETRIC_ODD
%lift_coeff
-0.5
 0.25
%lift_cnct
 11
 11
%lift_norm
 1.41421356237310
 0.70710678118655
%filt_AL - symmetric
-2,-0.17677669529664
-1, 0.35355339059327
 0, 1.06066017177982
 1, 0.35355339059327
 2,-0.17677669529664
%filt_AH - symmetric
-1,-0.35355339059327
 0, 0.70710678118655
 1,-0.35355339059327
%filt_SL - can be deduced from filt_AH
%filt_SH - can be deduced from filt_AL