Open source and open-ended

We are building three interactive artworks for Loop 2008, primarily using open source technologies. We use Arduino microcontrollers to link sensors to Macs and PCs doing lots of number crunching (for example, image processing). For image processing we are using Processing and Open Frameworks. For sound synthesis we are using SuperCollider.

Our approach to designing the work has been participatory and open-ended. A group of local artists and technologists who have developed the concepts for each piece. Blip has provided mentoring and training for the participants. Most importantly, the participants have learnt from each other and combined their artistic and technological skills, such as: writing code; designing and etching printed circuit boards; designing user interactions; and wiring up sensors.

Currently two of the three pieces are very near completion.

Shadow Wall captures the moving silhouettes of people as they walk in front of a white screen. These images are stored, digitally manipulated (colour, blur and transparency) and amalgamated into a single dynamic composition. This is projected on the screen when there are no users throwing shapes. The projection builds up over the day, older animations fading away over time, creating a dynamic history of the way people have interacted with the system.

Spinning Mirror consists of bicycle wheel and frame which are positioned on top of a plinth – the centre of the wheel is at average head height. A user faces the wheel and their image is captured by a webcam. If the user spins the wheel then their image is traced out by spinning LEDs. Due to POV (persistence of vision) the image stays relatively motionless although the LEDs are rotating. The system adapts to variations in the spinning speed to keep the image in the same position.

Sound Posts is an interactive sonic environment which is being actively developed using SuperCollider software that responds to the proximity of people (measured using ultrasonic sensors).