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error in image acquisition through webcam using matlab

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navee_navee

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hai frnds!!

i'm naveen.. i'm doing a face recognition project as major final year project in b.tech,i've been using the following code to acquire image through webcam but it shows a blank image in output...can any one help me? thanks


vid = videoinput('winvideo');
preview(vid);
start(vid);
im=getdata(vid); % im = getsnapshot(vid); alternative use
figure,imshow(im);

i'm using integrated webcam of laptop (model : compaq cq 40-144 tu).
 

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