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Guilherme
Guilherme

Reputation: 145

GUI in matlab, loop of images in axes

So I'm building a classifier of images. In the GUI a image loads and insert a value on a text box, and push a button. I'm having a problem loading the image in the axes. Because when the axes function is called the handles is zero(due to:% handles empty - handles not created until after all CreateFcns called). And my problem is, how do I get to just call one image at a time for the axes.

The ideal solution, is I create a handles.images=imagedatastore, and every time I push the button I add to a counter(which I already have made) and then that give the indices to get the image from the datastore. My problem with this is that I can't get the first picture, because in the beginning the handles are empty. I have made the callfunction for the axes: 

    % --- Executes during object creation, after setting all properties.
function axes1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to axes1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
[pict_croped,Nphotos,Date_img] =getcropedimagages;

handles.img =pict_croped;
i=readimage(handles.img,1);
% axes(hObject)
imshow(i)
% Hint: place code in OpeningFcn to populate axes1

but this has two problems, first, I don't really want to call the function that creates the datastore all the time I push the button, second, I still can't get the indice of the counter to be in the function,if I have:

i=readimage(handles.img,handles.counter)

it will give me the error in the first time, of not having handles.counter

Any idea how to solve this?This is the first GUI I'm building.

Upvotes: 0

Views: 348

Answers (2)

Guilherme
Guilherme

Reputation: 145

Well, I end up with: in the opening fucntion:

i = readimage(handles.img,handles.counter);
imshow(, 'Parent', handles.axes1)

and in the button call back:

i = readimage(handles.img,handles.counter);
imshow(i, 'Parent', handles.axes1)

inthe end is a very simple solution, I think I was just mind blocked over the first iteration...

Upvotes: 0

Suever
Suever

Reputation: 65430

The issue is very clearly in the comment that GUIDE provides for you. The handles struct isn't populated until all CreateFcn have been run so you'll want to use the OpeningFcn to do any initialization of the graphics objects. You can then add any data you need to the handles struct and save it using guidata so that it's available from within all of your other callback functions. 

function OpeningFcn(hObject, eventData, handles)

    [pict_croped,Nphotos,Date_img] = getcropedimagages;

    handles.img = pict_croped;
    i = readimage(handles.img,1);
    imshow(i, 'Parent', handles.haxes1)

    % "Save" the changes to the handles object
    guidata(hObject, handles)

Upvotes: 1

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