videoinput error in real time detection

Hello sir, While I was working on real time face detection I got this error when I run my code for the second time. I have written stop(vid) and clear (vid) at the end of script,still I am getting this following error.

"winvideo: The device associated with device ID 1 is already in use. A new videoinput object cannot be created for this device while it is in use."

Can you tell me how to get rid of this? Thank you

[Nachiket Patki]

my code is here:

vid = videoinput('winvideo',1,'YUY2_640x480');

triggerconfig(vid ,'manual');

set(vid, 'TriggerRepeat',inf);

set(vid, 'FramesPerTrigger',1);

vid.ReturnedColorspace = 'rgb';

vid.Timeout = 6;

start(vid);

while(1)
    facedetector = vision.CascadeObjectDetector;     

      trigger(vid); 

      img = getdata(vid, 1);

      bbox = step(facedetector, img);

      hello = insertObjectAnnotation(img,'rectangle',bbox,'Face');

      imshow(hello);

      imwrite(img(bbox(2):bbox(2)+bbox(4),bbox(1):bbox(1)+bbox(3)),'Faceimage.jpg')

end

stop(vid),clear vid

[Nachiket Patki]

Also, why the face detection process is in general very slow, can you please tell me what must the reason for this? Because I tried code in python but its comparatively very fast. Thank you

Answer 1

[Ashiq Ullah]

Use this method:

>>objects = imaqfind ;

>> delete(objects) ;