videoinput object dimensions in custom GUI

2014 3 15
3 个回答
回答已采纳
更新时间：2014 3 15
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0 个投票

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.

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 采纳的回答

Image Analyst
Image Analyst 2014-3-15

0 个投票

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.

更多回答（2 个）

Yogi
Yogi 2014-3-15

0 个投票

Thanks for reply. Yes I am calling delete() and clear as well to clear that obj completely, like this - delete(obj); clear obj;
As soon as I restart with different resolution it still shows in same size.I am not getting any clue.
Yogi
Yogi 2014-3-15

0 个投票

Please note I am using Matlab R2011b 32-bit.

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