Media Files
Technical Description
Video Tracking:
An old Sony Handycam in Nightshot-mode, an infrared filter and a infrared LED in the brush made it easy to track the brightest pixel in the image.
Paint buckets:
To sense when the brush is in the paint bucket I used very sensitive pressue/touch sensors.
An Arduino microcontroller board is connected to the USB-port of the computer (serial) and sends the bucket information.
The brush:
Made from wood, filled with: an Arduino Mini, an EasyRadio RF transceiver to communicate with the computer, an accelerometer to sense to movements of the brush, 2 RGB-LEDs to glow in many colors, an infrared LED to be seen by the camera, and a battery-pack (4x 1,5V AAA, lasted >6h).
Communication:
The computer is attached to another EasyRadio Transceiver keep in touch with the brush. The RF module was connected to USB via a serial/usb converter. The computer sends the chosen color to the brush, and the brush answers with the accelerometer data.
Softwre:
Made with Processing. Video Tracking, communications and visualization run all in the same Processing sketch. Actionpainting algorithm partly taken from Stamen, Splatter http://stamen.com/projects/splatter,
©2003 Michal Migurski, Stamen Design and translated from Actionscript to Java/Processing by me. I modified the splatter code so it could react on accelerometer data.
Hardware / Software
Hardware:
Arduino-Board, Arduino-Mini Board, Pressure-Sensors, RGB-LEDs, Accelerometer (ST-Microelectronics), EasyRadio RF-Transmitters, Sony Handycam, Nesc Projector, Apple MacPro.
Software:
Arduino-Software for the microcontrollers. Processing (http://www.processing.org) for video tracking, motion tracking and visuals.