Matlab GUI realizes the function of clicking the button, opening the file dialog box and importing pictures

That's what it is MATLAB Gui Interface built in , The purpose is to read and import pictures .

stay Gui In the interface , Right click the button , choice Callback Enter the callback function （ Right click the select Picture button --- Click View callback ---- choice Callback）, The visible codes are as follows ：

Because what I want to display is a picture , So the file type only selects .bmp and .jpg and .png Three formats , Of course, you can add it according to your own needs ！

filename The file name is saved in ,filepath The path saved in is , Note that the second sentence must be filepath before , So that the file can be read later .

function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

global image;
[filename,filepath]=uigetfile({'*.bmp;*.png;*.jpg;'},' Choose an image ');% Write down the file types that can be imported 
if(isequal(filename,0)||isequal(filepath,0)) % If you press Cancel , be return
    return;
end
image = [filepath,filename]; % Save the file name , And as a global variable , It is convenient for later programs to call 
im=imread(image);
axes(handles.axes1);
imshow(im);
title(' original image '); % Display images , stay axes1
axes(handles.axes2);
imhist(im); % Output image histogram , stay axes2
title(' Histogram of original image ');

Command annotations ：

1、uigetfile - Open standard dialog box for retrieving files（ Open the standard dialog box to retrieve the file ）

[FileName,PathName,FilterIndex] = uigetfile(FilterSpec)

[ file name , Pathname , Filter index ]=uigetfile（ Filter specification , That is, the filtered content )

2、imread - Read image from graphics file（ Read image from drawing file ）

3、Set - Set graphics object properties（ Set drawing object properties ）

4、Image - Display image object（ Display image objects ）

After importing successfully , The image is displayed in axes Control ！（axes The control number should be based on its own Gui Actually modify ）

So far, the function of selecting pictures from folders has been completed ！