How can I use imfindcircles in real time video?

I have written below code which gives photo from camera and mark circles on them

vid = videoinput('winvideo', 1, 'RGB24_640x480');

set(vid, 'FramesPerTrigger', Inf);

set(vid, 'ReturnedColorspace', 'rgb')

vid.FrameGrabInterval = 5;

data = getsnapshot(vid);

[center,radii] = imfindcircles(data,[20 60],'ObjectPolarity','dark','Sensitivity',0.9,'Method','twostage');

imshow(data)

h=viscircles(center,radii);

how can I make this working in real time?

Answer 1

[Image Analyst]

You may not be able to. How long does it take to call imfindcircles()? Wrap it in tic and toc to find out. It may take longer than 1/30th of a second or whatever your definition of "real time" is.

Answer 2

[kurczak]

It takes to long for this operation. I worked on this for a while and i add something like this

while(vid.FramesAcquired<=200)

   data = getsnapshot(vid);

   imshow(data)

   [center,radii] = imfindcircles(data,[20 60],'ObjectPolarity','dark','Sensitivity',0.9,'Method','twostage');

   h=viscircles(center,radii);

end

It's working but the image is to slow it's supposed to be live. I know I'm operating on photos from camera. Using getdata() I get frames but then I can't use imffindcicles beacuse it's operating on photos.

[Image Analyst]

Well it was just a suggestion. You're free to work on a faster method. And no, I don't have one ready to hand over to you, or even know of one. Plus I don't use Simulink.

Answer 3

[Spandan Tiwari]

Two ways to get IMFINDCIRCLES run faster in your code are:

1) Sending in the image at a lower resolution.

2) Use smaller radius range, if possible.