Computer tracking of billiard balls

The folks at the London-based startup GoCardless have a pool table at their office. Being the techies they are, they decided to build a system that automatically scores games. The results, while not fully complete, are still pretty impressive for something whipped up during a 48 hour hackathon.

The automated score keeper uses a webcam duct taped to the ceiling right above the center of the pool table, The balls – red and yellow balls replace the rainbow of solids and stripes to make things easier – are found using OpenCV.

This build isn’t quite finished yet. The people at GoCardless are looking to improve the accuracy of their setup by using a camera with a higher frame rate and possibly moving on to physics simulation to predict where the balls should be. If these guys get the time, they could add something like augmented reality pool table to improve shot accuracy.

Vidia after the break.

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Modded Wall-E becomes a real robot

[DJ Sures] got his hands on a plastic Wall-E toy and decided to build a robot that includes a camera, voice recognition, and object tracking. The result is adorable so we’re putting this video before the break:

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Satellite tracking by shining a laser into space

[Shingo Hisakawa] sent in a tip for a for a neat little box called the Levistone that tracks the Internation Space Station with a laser. His video log goes though all the steps for this great little project.

[Shingo] originally planned to pull orbital data down from NORAD and send that to an ArduinoBT board with ethernet, GPS and compass modules. In the original plan, the Arduino would do the orbit calculations and point the laser using a few servos. There wasn’t much success with making an Arduino do all the work, so the an Android phone stood in for the GPS, compass and connection to the web. The duty of calculating the location of the ISS using GPS and orbital elements was moved onto the Amazon EC2 cloud. The final product looks great, even if it’s impossible to record the beam for the video.

With the ability to calculate the azimuth and elevation of the ISS from any point in the world, [Shingo] came up with SightSpaceStation, a neat mashup of his data and Google Maps. There are also iOS and Android apps for a nice piece of work in augmented reality. It’s a great project that would really compliment the ISS desk lamp we covered a few days ago.

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