【图像去噪】基于空域和频域两种滤波实现图像去噪含Matlab源码

 1 简介

本文是基于MATLAB的GUI来对不同的（彩色或灰色）图像进行图像增强的相关处理，主要包括以下四点：

频域变换：傅里叶变换和离散余弦变换及其反变换，可将图像在空域上的特性转化到频域上；

叠加噪声：对图像添加高斯噪声和椒盐噪声；

空域滤波：对噪声污染后的图像添加不同模板下的平滑滤波和锐化滤波，可选择不同模板尺寸；

频域滤波：对噪声污染后的图像添加理想低通滤波器、巴特沃斯低通滤波器、理想高通滤波器、巴特沃斯高通滤波器、带通滤波器、带阻滤波器等，可实现平滑图像的效果。

2 部分代码

function varargout = untitled2(varargin)% UNTITLED2 M-file for untitled2.fig%      UNTITLED2, by itself, creates a new UNTITLED2 or raises the existing%      singleton*.%%      H = UNTITLED2 returns the handle to a new UNTITLED2 or the handle to%      the existing singleton*.%%      UNTITLED2('CALLBACK',hObject,eventData,handles,...) calls the local%      function named CALLBACK in UNTITLED2.M with the given input arguments.%%      UNTITLED2('Property','Value',...) creates a new UNTITLED2 or raises the%      existing singleton*.  Starting from the left, property value pairs are%      applied to the GUI before untitled2_OpeningFunction gets called.  An%      unrecognized property name or invalid value makes property application%      stop.  All inputs are passed to untitled2_OpeningFcn via varargin.%%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one%      instance to run (singleton)".%% See also: GUIDE, GUIDATA, GUIHANDLES​% Edit the above text to modify the response to help untitled2​% Last Modified by GUIDE v2.5 29-Apr-202110:27:36​% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name',       mfilename, ...                   'gui_Singleton',  gui_Singleton, ...                   'gui_OpeningFcn', @untitled2_OpeningFcn, ...                   'gui_OutputFcn',  @untitled2_OutputFcn, ...                   'gui_LayoutFcn',  [] , ...                   'gui_Callback',   []);if nargin & isstr(varargin{1})    gui_State.gui_Callback = str2func(varargin{1});end​if nargout    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});else    gui_mainfcn(gui_State, varargin{:});end% End initialization code - DO NOT EDIT​​% --- Executes just before untitled2 is made visible.function untitled2_OpeningFcn(hObject, eventdata, handles, varargin)% This function has no output args, see OutputFcn.% hObject    handle to figure% eventdata  reserved - to be defined in a future version of MATLAB% handles    structure with handles and user data (see GUIDATA)% varargin   command line arguments to untitled2 (see VARARGIN)​% Choose default command line output for untitled2handles.output = hObject;​% Update handles structureguidata(hObject, handles);​% UIWAIT makes untitled2 wait for user response (see UIRESUME)% uiwait(handles.figure1);​​% --- Outputs from this function are returned to the command line.function varargout = untitled2_OutputFcn(hObject, eventdata, handles)% varargout  cell array for returning output args (see VARARGOUT);% hObject    handle to figure% eventdata  reserved - to be defined in a future version of MATLAB% handles    structure with handles and user data (see GUIDATA)​% Get default command line output from handles structurevarargout{1} = handles.output;​​​​%四个下拉菜单% --- Executes during object creation, after setting all properties.function popupmenu1_CreateFcn(hObject, eventdata, handles)% hObject    handle to popupmenu1 (see GCBO)% eventdata  reserved - to be defined in a future version of MATLAB% handles    empty - handles not created until after all CreateFcns called​% Hint: popupmenu controls usually have a white background on Windows.%       See ISPC and COMPUTER.if ispc    set(hObject,'BackgroundColor','white');else    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));end​​% --- Executes on selection change in popupmenu1.function popupmenu1_Callback(hObject, eventdata, handles)% hObject    handle to popupmenu1 (see GCBO)% eventdata  reserved - to be defined in a future version of MATLAB% handles    structure with handles and user data (see GUIDATA)​% Hints: contents = get(hObject,'String') returns popupmenu1 contents as cell array%        contents{get(hObject,'Value')} returns selected item from popupmenu1​​% --- Executes during object creation, after setting all properties.function popupmenu2_CreateFcn(hObject, eventdata, handles)% hObject    handle to popupmenu2 (see GCBO)% eventdata  reserved - to be defined in a future version of MATLAB% handles    empty - handles not created until after all CreateFcns called​% Hint: popupmenu controls usually have a white background on Windows.%       See ISPC and COMPUTER.if ispc​​

3 仿真结果

4 参考文献

[1]崔艳萌. 联合空域和频域的图像去噪算法及其应用研究[D]. 河南师范大学, 2016.

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