A Piano for Visuals: Affordances of Scan Processing Instruments.

The analog technology of scan processing was developed and used during the 1970s as a method of electronic image animation. Because their real time modes of operation strongly resemble those of electronic musical instruments, scan processors can be considered instruments with which to compose and play moving images. Although cheaper digital tools replaced them in commercial studios during the 1980s, scan processing has a distinctive aesthetic that continues to inspire both visual artists and instrument designers. This article examines the way that scan processing instruments' affordances arise from specific combinations of the user, technology, and situation by surveying a number of technical and artistic use cases involving two different instruments: the VP-8 Image Analyzer and the Rutt/Etra Video Synthesizer. The article also demonstrates how reenacting an instrument works through its historical affordances using current technological means to address present-day contexts. [ABSTRACT FROM AUTHOR]