Plotting in GUI from an external function using imagesc()

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Darren Miller 2020-5-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/523290-plotting-in-gui-from-an-external-function-using-imagesc

评论： Walter Roberson 2020-5-6

So I've got an image file loaded in using image = imread(app.ImageName) and I am trying to send it off to an external function to do a fourier transform on it then show it on the gui using imagesc..

How do I use imagesc in a way that might be similar to imshow(img,'parent',app.UIaxes)??

Just to see if I could get something working, I also tried using imshow(img,'parent',app.UIaxes) within this external function to see if I could plot to the gui using that and it is not working either... giving me an error. I need to use imagesc but figured I'd mess around with imshow to see if I could get anything working. Heres whats happening

in GUI:

app.baseImg = imread(app.Input);
imshow(app.baseImg,'Parent',app.UIAxes)
doFourier(app.baseImg,app.RunMode,app.flareAngle,app.stepSize) %calls external function doFourier.m, plugging in the image

in external function, doFourier.m:

imshow(I,'parent',FourierApp.UIAxes2);   %I is a modified image of the input image, app.baseImg

and heres the error it is giving me

The property 'UIAxes2' in class 'FourierApp' must be accessed from a class instance because it is not a Constant property.
Error in doFourier (line 5)
imshow(I,'parent',FourierApp.UIAxes2);

EDIT: If I tyoe

FourierApp()

before the imshow() in doFourier it works because it calls the class or something, but then it opens up another instance of the app... I need to call the class somehow at the beginning of the external function so that I can use it to modify things in the FourierApp class.