MATLAB: Videoinput object dimensions in custom GUI

Image Acquisition Toolboxpeekdatavideoinput size

Hi,
I am trying to acquire and process video frame by frame. So far I am able to achieve the task but my problem about setting dimension/size of videoinput object.
I am creating it as follows-
obj = videoinput('winvideo', deviceId, 'RGB24_640x480','ReturnedColorSpace','rgb');
triggerconfig(obj, 'manual');
set(obj, 'Tag', appTitle, 'FramesAcquiredFcnCount', 1, … 'TimerFcn', @localFrameCallback, 'TimerPeriod', 0.01);
start(obj);
it opens the live video streaming and starts grabbing frames and does the necessary job in localFrameCallback.
Even if I try as follows-
obj = videoinput('winvideo', deviceId, 'RGB24_2592x1944','ReturnedColorSpace','rgb'); still the video streaming opens in same size/dimensions.
Can anybody please suggest how can I manipulate/ change videoinput object size/dimensions?
Note: I am using peekdata to grab frame.

Best Answer

It should not. It should be created with the new size. Make sure you call delete() or clear() on the obj to make sure it's completely blown away before you try to create it anew.
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