1.保存类型：图片如png、jpg、bmp等格式
2.
保存的代码已用imwrite写了，问题在于另存为的代码如何编写。
保存代码：
function savenoise_Callback(hObject, eventdata, handles)
% hObject handle to savenoise (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global Y;%Y为加噪后的图像文件
imwrite(Y,'noise.jpg','jpg');
% --------------------------------------------------------------------
function savefiter_Callback(hObject, eventdata, handles)
% hObject handle to savefiter (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
global Z;%Z为滤波后图像文件
imwrite(Z,'filter.jpg','jpg');
有没有大佬能帮忙弄出个另存为代码，要求可以选择保存文件路径与保存的图像类型
