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用MATLAB的GUI程序设计一个具备图像边缘检测功能的用户界面,该设计程序有以下基本功能:
(1)图像的读取和保存。
(2)设计图形用户界面,让用户对图像进行彩色图像到灰度图像的转换,并显示原图和灰度图像。
(3)设计图形用户界面,让用户能够根据需要来选择边缘检测算子,即选择边缘检测的方法。
(4)设计图形用户界面,让用户能够自行设定检测的阈值和方向。
(5)显示边缘检测后的图像,并与原图和灰度图像进行对比。
1、建立菜单,选项包括“文件”(打开、保存、退出)、“检测方法”(sobel、prewitt、roberts、canny)和“帮助”。
建立3个坐标轴对象,用于显示原始图像、灰度图像和边缘检测后的图像。
建立1个按钮,用于将原始图像转换为灰度图像。
建立1个文本编辑框,用于输入数据。
建立菜单,选项包括“文件”(打开、保存、退出)、“检测方法”(sobel、prewitt、roberts、canny)和“帮助”。
五个静态文本框的string属性分别为“原图”、“灰度图像”、“检测图像”、“设定阈值”和“检测方向”。
三个坐标轴的Tag标识分别为original_image、gray_image、test_image。
按钮控件的string属性为“灰度转换”,Tag标识为rgbtogray。
文本编辑框的Tag标识为thresh_value。
列表框的string属性为horizontal、vertical、both,Tag标识为direction。
编写代码完成程序中的变量赋值、输入、输出等工作,打开对应文件,在对应函数位置添加如下程序,其他代码不变。
- function varargout = m240531(varargin)
- % M240531 MATLAB code for m240531.fig
- % M240531, by itself, creates a new M240531 or raises the existing
- % singleton*.
- %
- % H = M240531 returns the handle to a new M240531 or the handle to
- % the existing singleton*.
- %
- % M240531('CALLBACK',hObject,eventData,handles,...) calls the local
- % function named CALLBACK in M240531.M with the given input arguments.
- %
- % M240531('Property','Value',...) creates a new M240531 or raises the
- % existing singleton*. Starting from the left, property value pairs are
- % applied to the GUI before m240531_OpeningFcn gets called. An
- % unrecognized property name or invalid value makes property application
- % stop. All inputs are passed to m240531_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 m240531
-
- % Last Modified by GUIDE v2.5 31-May-2024 11:43:02
-
- % Begin initialization code - DO NOT EDIT
- gui_Singleton = 1;
- gui_State = struct('gui_Name', mfilename, ...
- 'gui_Singleton', gui_Singleton, ...
- 'gui_OpeningFcn', @m240531_OpeningFcn, ...
- 'gui_OutputFcn', @m240531_OutputFcn, ...
- 'gui_LayoutFcn', [] , ...
- 'gui_Callback', []);
- if nargin && ischar(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 m240531 is made visible.
- function m240531_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 m240531 (see VARARGIN)
-
- % Choose default command line output for m240531
- handles.output = hObject;
-
- % Update handles structure
- guidata(hObject, handles);
-
- % UIWAIT makes m240531 wait for user response (see UIRESUME)
- % uiwait(handles.figure1);
-
-
- % --- Outputs from this function are returned to the command line.
- function varargout = m240531_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 structure
- varargout{1} = handles.output;
-
-
- % --- Executes on button press in rgbtogray.
- function rgbtogray_Callback(hObject, eventdata, handles)
- % hObject handle to rgbtogray (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
- gray=rgb2gray(handles.img)
- set(handles.gray_image, 'HandleVisibility', 'ON');
- axes(handles.gray_image)
- imshow(gray);
- handles.img=gray;
- guidata(hObject,handles);
-
-
- function thresh_value_Callback(hObject, eventdata, handles)
- % hObject handle to thresh_value (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 thresh_value as text
- % str2double(get(hObject,'String')) returns contents of thresh_value as a double
-
-
- % --- Executes during object creation, after setting all properties.
- function thresh_value_CreateFcn(hObject, eventdata, handles)
- % hObject handle to thresh_value (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 selection change in direction.
- function direction_Callback(hObject, eventdata, handles)
- % hObject handle to direction (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 direction contents as cell array
- % contents{get(hObject,'Value')} returns selected item from direction
-
-
- % --- Executes during object creation, after setting all properties.
- function direction_CreateFcn(hObject, eventdata, handles)
- % hObject handle to direction (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 && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
- set(hObject,'BackgroundColor','white');
- end
-
-
- % --------------------------------------------------------------------
- function Untitled_1_Callback(hObject, eventdata, handles)
- % hObject handle to Untitled_1 (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
-
-
- % --------------------------------------------------------------------
- function Untitled_2_Callback(hObject, eventdata, handles)
- % hObject handle to Untitled_2 (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
-
-
- % --------------------------------------------------------------------
- function Untitled_3_Callback(hObject, eventdata, handles)
- % hObject handle to Untitled_3 (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
-
-
- % --------------------------------------------------------------------
- function Sobel_Callback(hObject, eventdata, handles)
- % hObject handle to Sobel (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
- v1=str2double(get(handles.thresh_value, 'string' ));
- contents=get(handles.direction,'string');
- v2=contents{(get(handles.direction,'value'))};
- edge_sobel=edge(handles.img,'sobel',v1,v2);
- set(handles.test_image, 'HandleVisibility','ON');
- axes(handles.test_image);
- imshow(edge_sobel)
- handles.img=edge_sobel;
- guidata(hObject,handles);
-
- % --------------------------------------------------------------------
- function Prewitt_Callback(hObject, eventdata, handles)
- % hObject handle to Prewitt (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
- v1=str2double(get(handles.thresh_value,'string'))
- contents=get(handles.direction, 'string');
- v2=contents{(get(handles.direction,'value' ))};
- edge_prewitt=edge(handles.img, 'prewitt' ,v1,v2);
- set(handles.test_image, 'HandleVisibility','ON');
- axes(handles.test_image);
- imshow(edge_prewitt)
- handles.img=edge_prewitt;
- guidata(hObject,handles);
-
- % --------------------------------------------------------------------
- function Roberts_Callback(hObject, eventdata, handles)
- % hObject handle to Roberts (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
- v1=str2double(get(handles.thresh_value,'string'))
- contents=get(handles.direction, 'string');
- v2=contents{(get(handles.direction,'value'))};
- edge_roberts=edge(handles.img, 'roberts' ,v1,v2);
- set(handles.test_image, 'HandleVisibility','ON');
- axes(handles.test_image);
- imshow(edge_roberts)
- handles.img=edge_roberts;
- guidata(hObject,handles);
-
-
- % --------------------------------------------------------------------
- function Canny_Callback(hObject, eventdata, handles)
- % hObject handle to Canny (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
- v1=str2double(get(handles.thresh_value, 'string'));
- contents=get(handles.direction,'string');
- v2=contents{(get(handles.direction,'value'))};
- edge_canny=edge(handles.img,'canny',v1, v2);
- set(handles.test_image, 'HandleVisibility','ON');
- axes(handles.test_image);
- imshow(edge_canny);
- handles.img=edge_canny;
- guidata(hObject,handles);
-
- % --------------------------------------------------------------------
- function open_Callback(hObject, eventdata, handles)
- % hObject handle to open (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
- [filename,pathname] = uigetfile({'*.jpg';'*.bmp';'*.tif';'*.*'},'载入图像');
- if isequal(filename,0) || isequal(pathname,0)
- errordlg('没有选中文件','出错');
- return;
- else
- file=[pathname,filename];
- global S
- S=file;
- x=imread(file);
- set(handles.original_image,'HandleVisibility','ON');
- axes(handles.original_image);
- imshow(x);
- handles.img=x;
- guidata(hObject,handles);
- end
-
- % --------------------------------------------------------------------
- function save_Callback(hObject, eventdata, handles)
- % hObject handle to save (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
- [sfilename,sfilepath]=uiputfile({'*.jpg';'*.bmp';'*.tif';'*.*'}, ...
- '保存图像文件','untitled.jpg');
- if ~isequal([sfilename,sfilepath],[0,0])
- sfileullname = [sfilepath,sfilename];
- imwrite(handles.img, sfilefullname);
- else
- msgbox('你按了取消键','保存失败');
- end
-
-
- % --------------------------------------------------------------------
- function exit_Callback(hObject, eventdata, handles)
- % hObject handle to exit (see GCBO)
- % eventdata reserved - to be defined in a future version of MATLAB
- % handles structure with handles and user data (see GUIDATA)
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