% 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