Controlling an LED matrix with an Android phone

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January 23rd, 2012, 23:46 Posted By: wraggster

Even though everyone with a smart phone has a small, powerful computer in their pocket, we haven’t seen many applications of this portable processing power that use the built-in camera. [Michael] decided to change this and built an LED matrix that displays the data coming from the phone’s camera.
For the build, [Michael] used two 32×32 LED panels from Adafruit along with an IOIOand an Arduino. To build the Android app, [Michael] used the Android OpenCV computer vision library that grabs an image from the Android camera and downsamples it to 64×32 pixels. This data is transferred over a serial connection from the phone to the IOIO and again from the IOIO to the Arduino. Even though each frame is 1024 bytes, [Michael] still gets around four frames per second on his LED matrix display.
After the break you can check out the results of [Michael]‘s build. The video is a little choppy because of the frame rate issue, but it’s still an interesting build in the Android software development category.

http://hackaday.com/2012/01/23/contr...android-phone/

For more information and downloads, click here!

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