www.gusucode.com > IPCV_Eval_Kit_R2019a_0ce6858工具箱matlab程序源码 > IPCV_Eval_Kit_R2019a_0ce6858/code/demo_files/I2_07_4_2Dfilter_fromSPT.m

    clear;clc;close all;imtool close all
%% 1師尦Low Pass Filter愝寁
N = 12;            % 師悢
Fpass = 0.3;       % 捠夁懷堟廃攇悢
Fstop = 0.35;      % 幷抐懷堟廃攇悢 
Wpass = 1;         % 捠夁懷堟廳傒
Wstop = 1;         % 幷抐懷堟廳傒
b = firls(N,[0 Fpass Fstop 1],[1 1 0 0],[Wpass Wstop]) %嵟彫擇忔  慄宍埵憡 FIR 僼傿儖僞乕偺愝寁 (棟憐摿惈偐傜偺廳傒晅偒愊暘擇忔岆嵎傪嵟彫偵)
%% 1師尦僼傿儖僞廃攇悢墳摎昞帵
freqz(b,1) 

%% 忋婰偺偙偲傪丄FDATool偵傛傝愝寁偡傞応崌
fdatool       % 愝寁偑姰椆屻丄僼傽僀儖 -> 僄僋僗億乕僩

%% 1師尦僼傿儖僞偺2師尦壔
H2 = ftrans2(b);    % 1師尦FIR僼傿儖僞偐傜丄墌懳徧2師尦僼傿儖僞愝寁
figure,freqz2(H2)   % 2師尦僼傿儖僞廃攇悢墳摎昞帵

%% 夋憸偺撉崬傒
I = imread('cameraman.tif');
figure;imshow(I);
%% 僼傿儖僞張棟
If = imfilter(I,H2);
imshow([I;If]);shg

%% 
% Copyright 2014 The MathWorks, Inc.