% 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]) sfilefullname=[sfilepath ,sfilename]; imwrite(handles.img,sfilefullname); else

msgbox('你按了取消键','保存失败'); end

程序关键部分：

通[sfilename ,sfilepath]=uiputfile({'*.jpg';'*.bmp';'*.tif';'*.*'},'保存图像文件','untitled.jpg')选择图像文件保存的路径与格式；然后，通过sfilefullname=[sfilepath ,sfilename];

imwrite(handles.img,sfilefullname); 实现对图像的保存。

(3)程序的退出。

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) clc; close all; close(gcf); clear;

4.3对图像进行任意的亮度和对比度变化调整，显示和对比变换前后的图像。 运行程序后，通过“编辑”菜单中的“常用处理”选中“亮度调节”

9 / 52

在显示出相应的功能键后，通过载入读取图像，比并进行处理，效果如下： 亮度处理前：

亮度处理后：

实现程序段如下：

% --- Executes on button press in radiobutton12.

function radiobutton12_Callback(hObject, eventdata, handles) % hObject handle to radiobutton12 (see GCBO)

10 / 52

% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton12 global T

axes(handles.axes2); T=getimage;

prompt={'调整倍数'}; defans={'1'};

p=inputdlg(prompt,'input',1,defans); p1=str2num(p{1});

y=imadjust(handles.img,[ ], [ ],p1); %亮度调节 imshow(y); handles.img=y;

guidata(hObject,handles);

对比度处理前：

对比度处理后(增强3倍)：

11 / 52

对比度减弱1.5倍后：

实现程序段如下：

function uipanel10_SelectionChangeFcn(hObject, eventdata, handles) % hObject handle to uipanel10 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global T

str=get(hObject,'string'); axes(handles.axes2);

switch str case'增强' T=getimage;

prompt={'输入参数:'}; defans={'1'};

p=inputdlg(prompt,'input',1,defans); p1=str2num(p{1});

f=immultiply(handles.img,p1); imshow(f);

12 / 52