失眠网 > 【图像增强】基于matlab GUI图像双边滤波【含Matlab源码 1492期】

【图像增强】基于matlab GUI图像双边滤波【含Matlab源码 1492期】

时间：2021-11-30 15:32:36

一、图像增强简介

图像增强是对图像的某些特征，如边缘、轮廓、对比度等进行强调或锐化，以便于显示、观察或进一步分析与处理。通过对图像的特定加工，将被处理的图像转化为对具体应用来说视觉质量和效果更“好”或更“有用”的图像。

图像增强是最基本最常用的图像处理技术，常用于其他图像处理的预处理阶段。

（1）高通平滑、低通锐化；平滑模糊、锐化突出图像细节

（2）滤波器还有带通、带阻等形式

（3）根据噪声（椒盐噪声、高斯噪声…）的不同，选用不同的滤波

（4）邻域有4-邻域、对角邻域、8-邻域，相对应的有邻接，即空间上相邻、像素灰度相似

（5）图像边缘处理：忽略不处理、补充、循环使用

（6）目前尚未图像处理大多基于灰度图像

二、快速亮通双边滤波器(FBPBF)简介

双边滤波是由Tomasi和Manduchi提出来的一种具有保持边缘和降噪效果的非线性滤波器，双边滤波采用基于高斯分布的加权平均的方法，用某个像素的周边像素亮度值的加权平均代表该点的强度．

2.1 亮通双边滤波器(BPBF)

亮通双边滤波(BPBF)是基于双边滤波的一种变体，可用于光照分量估计，相比于双边滤波，BPBF计算更复杂，但滤波效果更好，对细节的保持更精准．BPBF对图像V通道的光照分量估计的表达如下:

其中:f(i)表示HSV色彩空间的V通道;g(i)表示BPBF的输出;Ω是执行聚合的邻域．

其中，高斯空间核φ与单边高斯范围核ψ的表达如下:

其中:θ与σ分别是各自的标准差，一般而言，标准差越小，平滑的结果越不理想，标准差越大，平滑效果越好．

三、部分源代码

function varargout = demoUI(varargin)% DEMOUI MATLAB code for demoUI.fig%DEMOUI, by itself, creates a new DEMOUI or raises the existing%singleton*.%%H = DEMOUI returns the handle to a new DEMOUI or the handle to%the existing singleton*.%%DEMOUI('CALLBACK',hObject,eventData,handles,...) calls the local%function named CALLBACK in DEMOUI.M with the given input arguments.%%DEMOUI('Property','Value',...) creates a new DEMOUI or raises the%existing singleton*. Starting from the left, property value pairs are%applied to the GUI before demoUI_OpeningFcn gets called. An%unrecognized property name or invalid value makes property application%stop. All inputs are passed to demoUI_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% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ...'gui_Singleton', gui_Singleton, ...'gui_OpeningFcn', @demoUI_OpeningFcn, ...'gui_OutputFcn', @demoUI_OutputFcn, ...'gui_LayoutFcn', [] , ...'gui_Callback', []);if nargin && ischar(varargin{1})gui_State.gui_Callback = str2func(varargin{1});endif nargout[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});elsegui_mainfcn(gui_State, varargin{:});end% End initialization code - DO NOT EDIT% --- Executes just before demoUI is made visible.function demoUI_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 demoUI (see VARARGIN)% Choose default command line output for demoUIhandles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes demoUI wait for user response (see UIRESUME)% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line.function varargout = demoUI_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;function imagepath_Callback(hObject, eventdata, handles)% hObject handle to imagepath (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 imagepath as text% str2double(get(hObject,'String')) returns contents of imagepath as a double% --- Executes during object creation, after setting all properties.function imagepath_CreateFcn(hObject, eventdata, handles)% hObject handle to imagepath (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor','white');end% --- Executes on button press in browseButton.function browseButton_Callback(hObject, eventdata, handles)% hObject handle to browseButton (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)CallbackFcns browse;% --- Executes on button press in loadButton.function loadButton_Callback(hObject, eventdata, handles)% hObject handle to loadButton (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)CallbackFcns load;% --- Executes on button press in filterButton.function filterButton_Callback(hObject, eventdata, handles)% hObject handle to filterButton (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)CallbackFcns filter;% --- Executes on button press in pushbutton4.function pushbutton4_Callback(hObject, eventdata, handles)% hObject handle to pushbutton4 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% --- Executes on slider movement.function sliderS_Callback(hObject, eventdata, handles)% hObject handle to sliderS (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,'Value') returns position of slider% get(hObject,'Min') and get(hObject,'Max') to determine range of sliderCallbackFcns sigmas_slider;% --- Executes during object creation, after setting all properties.function sliderS_CreateFcn(hObject, eventdata, handles)% hObject handle to sliderS (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: slider controls usually have a light gray background.if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor',[.9 .9 .9]);end% --- Executes on slider movement.function sliderR_Callback(hObject, eventdata, handles)% hObject handle to sliderR (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,'Value') returns position of slider% get(hObject,'Min') and get(hObject,'Max') to determine range of sliderCallbackFcns sigmar_slider;% --- Executes during object creation, after setting all properties.function sliderR_CreateFcn(hObject, eventdata, handles)% hObject handle to sliderR (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: slider controls usually have a light gray background.if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor',[.9 .9 .9]);end% --- Executes on selection change in listbox1.function listbox1_Callback(hObject, eventdata, handles)% hObject handle to listbox1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% Hints: contents = cellstr(get(hObject,'String')) returns listbox1 contents as cell array% contents{get(hObject,'Value')} returns selected item from listbox1% --- Executes during object creation, after setting all properties.function listbox1_CreateFcn(hObject, eventdata, handles)% hObject handle to listbox1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: listbox controls usually have a white background on Windows.% See ISPC and COMPUTER.if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor','white');endfunction editS_Callback(hObject, eventdata, handles)% hObject handle to editS (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 editS as text% str2double(get(hObject,'String')) returns contents of editS as a doubleCallbackFcns sigmas_edit;% --- Executes during object creation, after setting all properties.function editS_CreateFcn(hObject, eventdata, handles)% hObject handle to editS (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor','white');endfunction editR_Callback(hObject, eventdata, handles)% hObject handle to editR (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 editR as text% str2double(get(hObject,'String')) returns contents of editR as a doubleCallbackFcns sigmar_edit;% --- Executes during object creation, after setting all properties.function editR_CreateFcn(hObject, eventdata, handles)% hObject handle to editR (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor','white');end% --- Executes on button press in saveButton.function saveButton_Callback(hObject, eventdata, handles)% hObject handle to saveButton (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)CallbackFcns save;% --- Executes on slider movement.function sliderEps_Callback(hObject, eventdata, handles)% hObject handle to sliderEps (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,'Value') returns position of slider% get(hObject,'Min') and get(hObject,'Max') to determine range of sliderCallbackFcns eps_slider;% --- Executes during object creation, after setting all properties.function sliderEps_CreateFcn(hObject, eventdata, handles)% hObject handle to sliderEps (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: slider controls usually have a light gray background.if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor',[.9 .9 .9]);endfunction editEps_Callback(hObject, eventdata, handles)% hObject handle to editEps (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 editEps as text% str2double(get(hObject,'String')) returns contents of editEps as a doubleCallbackFcns eps_edit;% --- Executes during object creation, after setting all properties.function editEps_CreateFcn(hObject, eventdata, handles)% hObject handle to editEps (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))set(hObject,'BackgroundColor','white');end