一维离散小波变换

clc;clear;
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%%1原始图像的产生
f1=50;         %  频率1
f2=100;        %  频率2
fs=2*（f1+f2）;  %  采样频率
Ts=1/fs;       %  采样间隔
N=120;         %  采样点数
n=1:N;
y=sin（2*pi*f1*n*Ts）+sin（2*pi*f2*n*Ts）;  %  正弦波混合
figure;
plot（y）;
title（‘Original Signal‘）
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% 2.小波滤波器产生 
h=wfilters（‘db10‘‘l‘）;  %  低通
g=wfilters（‘db10‘‘h‘）;  %  高通

figure（2）;
subplot（211）;
plot（h）;
title（‘low_ pass decompose filter‘）;
subplot（212）;
plot（g）;
title（‘high_ pass decompose filter‘）;

h=[hzeros（1N-length（h））];  %  补零（圆周卷积，且增大分辨率变于观察）
g=[gzeros（1N-length（g））];  %  补零（圆周卷积，且增大分辨率变于观察）
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