Sharing data between callback functions

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Oliver Ferenczi
Oliver Ferenczi 2020-2-10
评论： Oliver Ferenczi 2020-2-11
Hi, so in one callback function, I have the code,
file = uigetfile('*.jpg');
I would like to acess this file from a different callback function. However when I run the second callback, i get the error, "unrecognized function"
How do I allow the file to be acessed from other callback functions?
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Oliver Ferenczi
Oliver Ferenczi 2020-2-11
The issue with imread is that I need to access the file that was chosen in another callback function. So I am not sure how to get the file name from the other callback function.

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Guillaume
Guillaume 2020-2-11
"The issue with imread is that I need to access the file that was chosen in another callback function. So I am not sure how to get the file name from the other callback function."
You already have done it! The issue with your original error, as pointed out by Rik is that you never read the image, just passed the filename instead of the image to the face detector.
So instead of:
bboxes = step(faceDetector, app.file);
simply:
faceimage = imread(app.file); %actually read the image
bboxes = step(faceDetector, faceimage);

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