GETSNAPSHOT timeout error after adjusting camera settings

3 次查看（过去 30 天）
Sam
Sam 2011-7-13
Hello,
I am using a Webcam (Logitech C160) to capture Images using the Image acquisition toolbox (V 3.5) in Matlab 7.10.0.499. When ever I adjust the camera settings (brightness, exposure etc.) and try to capture an image afterwards I get a timeout error.
??? Error using ==> imaqdevice.getsnapshot at 65 A timeout occurred during GETSNAPSHOT.
Interestingly, when I run the preview window during the setting change I can see the camera changing brightness, exposure etc... and it works fine, however if I stop the preview, then start it after changing the settings the preview window stays black.
If I leave the preview window running during the change, the GETSNAPSHOT function seems to work fine. As soon as I stop the preview I get the error message again.
Running the snapshot function before the change without the preview works fine.
Any ideas would be appreciated!
Sam

请先登录，再回答此问题。

回答（1 个）

Chirag Gupta
Chirag Gupta 2011-7-13
Can you try and set the trigger to Manual and then try and acquire the snapshot.
triggerconfig(vidobj, 'manual');
% change properties
start(vidobj)
snapshot = getsnapshot(vidobj);
% Call the STOP function to stop the device.
stop(vidobj)
You could also change the Timeout property of the videoinput object.
  2 个评论
Sam
Sam 2011-7-13
Thank you for your reply!
Changing the trigger does not make a difference. It still will not work.
How do you change the timeout property of the videoinput object?
Chirag Gupta
Chirag Gupta 2011-7-14
I belive TimeOut is a property in the videoinput object.
vidObj.Timeout = 15;

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Acquisition Using Any Hardware 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by