1 簡(jiǎn)介

分析了幾種常見(jiàn)的圖像去噪方法的去噪原理和缺點(diǎn)后,主要研究了維納濾波算法的去噪原理和其在實(shí)際應(yīng)用中對(duì)高斯噪聲的去除優(yōu)點(diǎn),通過(guò)實(shí)驗(yàn)對(duì)比維納濾波算法和其他幾種常見(jiàn)的圖像去噪方法對(duì)高斯噪聲的去噪效果,并分析不同參數(shù)對(duì)維納濾波去噪效果的影響.實(shí)驗(yàn)結(jié)果表明,綜合主觀視覺(jué)效果和客觀PSNR值而言,在去除高斯噪聲時(shí),維納濾波可以取得更好的去噪效果,提高所獲取圖像的質(zhì)量.

2 部分代碼

function varargout = wiener_filter(varargin)% WIENER_FILTER M-file for wiener_filter.fig% ? ? ?WIENER_FILTER, by itself, creates a new WIENER_FILTER or raises the existing% ? ? ?singleton*.%% ? ? ?H = WIENER_FILTER returns the handle to a new WIENER_FILTER or the handle to% ? ? ?the existing singleton*.%% ? ? ?WIENER_FILTER('CALLBACK',hObject,eventData,handles,...) calls the local% ? ? ?function named CALLBACK in WIENER_FILTER.M with the given input arguments.%% ? ? ?WIENER_FILTER('Property','Value',...) creates a new WIENER_FILTER or raises the% ? ? ?existing singleton*. ?Starting from the left, property value pairs are% ? ? ?applied to the GUI before wiener_filter_OpeningFunction gets called. ?An% ? ? ?unrecognized property name or invalid value makes property application% ? ? ?stop. ?All inputs are passed to wiener_filter_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 wiener_filter% Last Modified by GUIDE v2.5 20-May-2009 10:04:40% 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 image_pop_menu.%function image_pop_menu_Callback(hObject, eventdata, handles)% hObject ? ?handle to image_pop_menu (see GCBO)% eventdata ?reserved - to be defined in a future version of MATLAB% handles ? ?structure with handles and user data (see GUIDATA)%LEN = str2num(get(handles.len_edit,'string'));%THETA = str2num(get(handles.theta_edit,'string'));variance = str2num(get(handles.variance_edit,'string'));val = get(hObject,'value');str = get(hObject,'string');switch str{val} ? ?case 'Lena' ? ? ? ?lena = []; ? ? ? ?lena = imread('lena.bmp'); ? ? ? ?img = lena; ? ?case 'Saturn' ? ? ? ?saturn = []; ? ? ? ?load imdemos saturn ? ? ? ?img = saturn; ? ?case 'Quarter' ? ? ? ?quarter = []; ? ? ? ?load imdemos quarter ? ? ? ?img = quarter; ? ?case 'Flower' ? ? ? ?flower = []; ? ? ? ?load imdemos flower ? ? ? ?img = flower; ? ?case 'Circuit' ?e to theta_edit (see GCBO)% eventdata ?reserved - to be defined in a future version of MATLAB% handles ? ?empty - handles not created until after all CreateFcns called% Hint: edit 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'));endfunction theta_edit_Callback(hObject, eventdata, handles)% hObject ? ?handle to theta_edit (see GCBO)% eventdata ?reserved - to be defined in a future version of MATLAB% handles ? ?structure with handles and user data (see GUIDATA)% Hints: get(hObject,'String') returns contents of theta_edit as text% ? ? ? ?str2double(get(hObject,'String')) returns contents of theta_edit as a double% --- Executes during object creation, after setting all properties.function variance_edit_CreateFcn(hObject, eventdata, handles)% hObject ? ?handle to variance_edit (see GCBO)% eventdata ?reserved - to be defined in a future version of MATLAB% handles ? ?empty - handles not created until after all CreateFcns called% Hint: edit 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'));endfunction variance_edit_Callback(hObject, eventdata, handles)% hObject ? ?handle to variance_edit (see GCBO)% eventdata ?reserved - to be defined in a future version of MATLAB% handles ? ?structure with handles and user data (see GUIDATA)% Hints: get(hObject,'String') returns contents of variance_edit as text% ? ? ? ?str2double(get(hObject,'String')) returns contents of variance_edit as a double% --- Executes on button press in close_button.function close_button_Callback(hObject, eventdata, handles)% hObject ? ?handle to close_button (see GCBO)% eventdata ?reserved - to be defined in a future version of MATLAB% handles ? ?structure with handles and user data (see GUIDATA)close(wiener_filter);

3 仿真結(jié)果

4 參考文獻(xiàn)

[1]張東, 覃鳳清, 曹磊,等. 基于維納濾波的高斯含噪圖像去噪[J]. 宜賓學(xué)院學(xué)報(bào), 2013, 13(12):4.

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