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How to do image rotation in matlab?

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Nimra Azmat
Nimra Azmat on 23 Jun 2019
Answered: Rik on 23 Jun 2019
How to make gui for image rotation.i need the code to get image rotated at every time i press pushbutton when i upload an image.
a=getappdata(0,'a');
aclock=a;
aclock=imrotate(aclock,270);
axes(handles.axes1);
imshow(aclock);

  2 Comments

Rik
Rik on 23 Jun 2019
This code looks like it should work. What is your question? What isn't this code doing that you want it to do?
Rik
Rik on 23 Jun 2019
Comment mistakenly posted as answer by Nimra Azmat:
it only rotate the image once and when i move it on the other angle (anticlock) it process the orignal image i want my code to change the orginal image and change it according to button press on any command

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Accepted Answer

Rik
Rik on 23 Jun 2019
It is a bit strange to store your image with getappdata on the graphics root, instead of with guidata. You will also notice that you aren't actually saving the result anywhere, so the function you've written only rotates the original image.
If you want to rotate the image in every callback, you need to store your image back somewhere, so in your case something like this should work:
a=getappdata(0,'a');
aclock=a;
aclock=imrotate(aclock,270);
axes(handles.axes1);
imshow(aclock);
setappdata(0,'a',aclock)

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