How to snapshot the image using imaq.VideoDevice?

Can I ask some question? I would like to know how to snapshot the image. I cannot use function getsnapshot with imaq.VideoDevice. Thank u.

Error is show that "Too many output argument" How to fixed it?

Thank you :)

[Geoff Hayes]

Ara - what is the line (or lines) of code that you are using to get a snapshot of the image? The error too many output arguments implies that the code is expecting more outputs than what the function provides.

From getsnapshot, there are two output "signatures"

 frame = getsnapshot(obj)
 [frame, metadata] = getsnapshot(obj)

Is your code similar, or is it expecting more outputs?

[Ara]

It's about like this

Thank you very much :)

vidDevice = imaq.VideoDevice('winvideo', 1, 'YUY2_640x480');

imag=getsnapshot(vidDevice);

imwrite(imag,'camera.jpg');

pre=imread('camera.jpg');

imshow(pre);

[Geoff Hayes]

And the error occurs at which line?

Have you checked out imaq.videodevice? In the example, the code uses

 frame = step(vidobj);

to acquire a single frame. What happens when you try to use this function?

[Ara]

Thank you, I got it :)