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Square object detection using webcam

Asked by mona on 10 Feb 2013

Hello experts,

I have this code which works so perfect while detecting square objects from images which are downloaded from internet. However, when I am taking the image of a square object from my webcam and processing, its not turning out to be as expected. I am suspecting, the reason could be due to the green and pink hues which are dominantly captured from webcam. The actual output which is being obtained is that there are squares distributed at random places. What do you all suggest?

0 Comments

mona

2 Answers

Answer by Image Analyst on 10 Feb 2013

I suggest you upload an image: http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers It's always easier to discuss image image processing advice if you have an image to see, don't you think?

5 Comments

Image Analyst on 13 Feb 2013

I don't see any square objects in that image.

mona on 13 Feb 2013

I am sorry, I meant circular and not square. I am really sorry for this mistake.

Image Analyst on 13 Feb 2013

You can edit your post to correct it. Have you tried imfindcircle()?

Image Analyst
Answer by mona on 13 Feb 2013

Yes, yes I did. I could send you the code through private message if you agree on thta.

3 Comments

Image Analyst on 13 Feb 2013
  1. This should have been a comment, not an answer.
  2. Your main problem is poor lighting.
  3. Also, findcircle may not work on ellipses.
  4. You may also need to adjust some parameters in imfindcircle. I haven't experimented around with it a lot.
mona on 13 Feb 2013

I have actually tried everything with the code along with the parameters of imfindcircle and I am completely confident that everything is perfect. However, I would only agree with one of your point which is poor lighting.

Image Analyst on 14 Feb 2013

I don't know why you don't agree with the other 3 points, but whatever...

mona

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