Evolutek 2010 - Computer vision for ball detection

Ball detection algorithm for robot vision

Category:

Science & Technology

Tags:

• Ball detection
• computer vision
• eurobot 2010
• Evolutek
• robot vision

[studentoflove]

what do you use to see what the camera see? softwear?

[stanefa]

With openCV you can save your frames from the webcam and save it as a avi file

[excessdelau]

Does the algorithm compute the distance to the balls and which ball to take first?

[stanefa]

Not this algorithm but it very simple to implement because you got the ball radius in pixel as you can see on the video. If you know the real ball radius and the position of the camera refered to the table you can compute the real distance to the balls. Then it's easy to know which ball to take first

[excessdelau]

How does the algorithm perform on shiny surfaces or on surfaces that reflect light a lot in the cameras lens? Did you encounter this problem?

[stanefa]

Of corse there are some critical situation you can do nothing against shiny surfaces but as you can see on the video I use the background to isolate the contour of the balls (I do an histogram in the triangle to check the main color of the background)

[excessdelau]

One last question :)

Do you use Hough transform or do you have your own algorithm implemented?

[stanefa]

Hi, I used the Philips SPC900NC webcam. It's an awsome quality camera. The algorithm is implemented on a PC with openCV.

[Speedemon1988]

what you did is awsome, please tell me what type of camera din you use and what microcontroller? Thank you.