Buttondownfcn callback on live video data (preview)

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Sam 2012-11-16

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Hello,

I am currently trying to initiate a callback routine when the user presses on an axis that contains a live video stream, i.e.

frame = getsnapshot(handles.vidObj);
axes = imshow(frame, 'Parent', handles.axes_stream); 
preview(handles.vidObj, axes); % assign vidObj to axes

However, I have not yet been able to achieve this despite looking at various discussions. I presume it is because the displayed video is stopping my mouse button being registered and the callback routine is not working.

Any help would be appreciated.

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Sam 2012-11-18

Anyone? I'm starting to think that maybe it's not possible.

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Sean de Wolski 2012-11-16

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I am guessing that preview is nullifying your ButtonDownFcn (just an educated guess though). Thus you would need to reinstate your ButtonDownFcn on the axes after calling preview.

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Image Analyst 2012-11-26

编辑：Image Analyst 2012-11-26

I haven't tried clicking on the live video axes. Would clicking on a button be an acceptable workaround? Because I know I can click on buttons while I have a live image in an axes, and it does the callback operations just fine.

Sam 2012-11-26

I will contact Technical Support and see what they have to say and report back. For now, I will use buttons to provide the necessary functionality.

Cheers everyone!

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