How to read image loaded in another function in GUI

I am a Matlab beginner, and am confused by the way that functions work in a GUI.

I'd like to use one pushbutton to prompt the user to load a file, and then another pushbutton to start analyzing that image. I can't figure out how to read the image that the user uploaded in the previous pushbutton callback function.

In the attached file, I tried to use the first suggestion in these FAQs by adding an image variable to the handles structure. I get the error "Reference to non-existent field 'image'."

What is the best way to call the image again?

[KSSV]

When you push a button, and upload file..you will get the name of the file with its path...you can use this to read/ analyse.

Answer 1

[bon sai]

If your pushbutton1_Callback to get the filepath, then read the image to array. Finally store it in handles and update handles. So the code seems like this:

    [file,path]= uigetfile(......);
    fullname = fullfile(path,file);
    image = imagesc(fullname);
    handles.image = image;
    guidata(hObject,handle)

When you call your image array in pushbutton2 just use

imageinbtn2 = handles.image