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Rotate image in Matlab app designer

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monkey_matlab on 11 Oct 2017
Commented: monkey_matlab on 23 Oct 2017
I was able to get an image rotated using Matlab GUI. I am now trying to implement the same effects using Matlab App Designer. Can you direct me as to how I can go about rotating the image using App designer with a slider.
Here is an extract of the code putting the image in the UIaxes:
% Code that executes after component creation
function startupFcn(app)
% Value changing function: SteeringSlider
function SteeringSliderValueChanging(app, event)
changingValue = event.Value;
How to now rotate the image?

Answers (1)

Rajesh Balagam
Rajesh Balagam on 16 Oct 2017
Edited: Rajesh Balagam on 16 Oct 2017
You need to store the image data in the app using a custom public property and access this data to rotate the image in the callback for slider.
Store the image data:
app.imageData = imread('cameraman.tif');
Rotate the image using imrotate function in slider callback:
rotatedImage = imrotate(app.imageData, changingValue);
Refer to this link ( on how to share data between callbacks in appdesigner.
  1 Comment
monkey_matlab on 23 Oct 2017
This solution does not work.
Also, the link is not valid.
This is what I have tried as per your suggestion but still not working:
properties (Access = public)
imageData = imread('cameraman.tif'); % Description
methods (Access = private)
% Code that executes after component creation
function startupFcn(app)
% Value changed function: Steer_ValueEditField
function Steer_ValueEditFieldValueChanged(app, event)
%value = app.Steer_ValueEditField.Value;
changingValue = app.SteeringSlider.Value;
rotatedImage = imrotate(app.imageData, changingValue);

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