How can I check a specific axes has an image or not ?

3 vues (au cours des 30 derniers jours)
Ahmer Shahid
Ahmer Shahid le 13 Jan 2019
Commenté : Ahmer Shahid le 13 Jan 2019
I am using app designer in Matlab 2018a and I replaces a button for testing which is disable.
I know how to enable it but I want to enable it when I have an image on axis.

Réponse acceptée

Kevin Phung
Kevin Phung le 13 Jan 2019
you can get the 'Children' property of the axes.
axes_handle.Children
%or
get(axes_handle,'Children')
  6 commentaires
Walter Roberson
Walter Roberson le 13 Jan 2019
if ~isempty(findobj(app.UIaxis.Children, 'type', 'flat', 'type', 'image'))
or
any(arrayfun(@(x)isa(x,'matlab.graphics.primitive.Image'),ax.Children))
Ahmer Shahid
Ahmer Shahid le 13 Jan 2019
Thank you very much.

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Plus de réponses (1)

Image Analyst
Image Analyst le 13 Jan 2019
What you accepted as the answer is really not the answer as Walter explained. You can use getimage() and check for zero-sized image. Here's a demo:
% Have either plot() or imshow() - comment out one of them.
% Put something into an axes that is NOT an image.
% plot(1:10)
% Put something into an axes that IS an image.
imshow('moon.tif')
% Check what's in the axes.
theImage = getimage();
whos theImage
if size(theImage, 1) ~= 0
msgbox('There is an image in there');
else
msgbox('There is no image in there');
end
  3 commentaires
Image Analyst
Image Analyst le 13 Jan 2019
You're welcome. You can also than people by clicking the "Vote" link under their icon.
Ahmer Shahid
Ahmer Shahid le 13 Jan 2019
I'm done with it.
Thanks Again.

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