Thread Subject:

saving an image

Hi,

I am trying to save one image from video stream that I have from my camera.
here is my code:
////////////////////////////////////////////////////

function imagesaving
vid=videoinput('avtmatlabadaptor_r2009a',1,'F0M5_Mono8_640x480');
triggerconfig(vid,'manual');
set(vid,'FramesPerTrigger',1);
start(vid);
im=getdata(vid,1);
figure,imshow(im);
imwrite(im,'C:\Documents and Settings\mlm-ad\Desktop\M files\newimg.jpg','jpg')
end

this what I got after some secs:

/////////////////////////////////////////////////////
Error event occurred at 15:31:39 for video input object: F0M5_Mono8_640x480-avtmatlabadaptor_r2009a-1.
GETDATA timed out before FRAMES were available.
??? Error using ==> imaqdevice.getdata at 153
GETDATA timed out before FRAMES were available.

Error in ==> imagesaving at 7
im=getdata(vid,1);


I wonder how could I solve this problem. I would be grateful for your help.

Alex

If you really just want one image from the camera, perhaps it's worth trying getsnapshot.

Otherwise, what you need to do is put the call to getdata into a callback function and register this with the video object. Then it will get called when a frame is ready. See the examples in the Image Acquisition Toolbox documentation.

David Thanks for the hints it was helpful.