An audiovisual performance by Golan Levin and Zachary Lieberman. Developed April 2004
The Media Centre [i]
9.30pm

Hand Forms in Hybrid Light
The Manual Input Sessions is nearly impossible to describe: an almost magical new form of audiovisual performance brought forth from a unique marriage of high technology and antique overhead projectors. Structured as "a series of audiovisual vignettes which probe the expressive possibilities of hand gestures and finger movements," this concert is performed on a combination of custom interactive software, analog OHP's and digital computer video projectors. The analog and digital projectors are aligned such that their projections overlap, resulting in an unusual quality of hybridized, dynamic light. During the performance, a computer vision system analyses the sihouettes of the performers’ hands as they move across the glass tops of the overhead projectors. The hand gestures are then analysed by custom software. In response, the software generates synthetic graphics and sounds that are tightly coupled to the forms and movements of the performers’ actions. The synthetic responses are co-projected with the analog shadows, resulting in an startlingly organic form of augmented-reality shadow play.

www.tmema.org/mis/

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