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Stereoscopic interactive scanline visualisation


2010

This work explores interactive stereoscopic 3D scanline visualisation applied to a dancer's body in motion. The result is a ever evolving abstract shape or form controlled by a simple user interface. Visualisation is done in realtime and stereoscopic 3D.

This video material is based on stereoscopic footage I captured for Double District, a multi-channel steroscopic video installation by Saburo Teshigawara with Volker Kuchelmeister (2008).

A horizontal scanline, applied simultaneously to the left and right eye video image, leaves a trail behind which forms a complex 3D shape over time. A user can interact with the work by adjusting the vertical position of the scanline. A rotary knob acts as a simple and intuitive interface. This dynamic change in position has a dramatic effect on the visuals, more or less of the body is revealed and the result is ever evolving.
Using a horizontal vs. a more common vertical scanline is necessary to preserve the horizontal image disparity or parallax between left and right eye view. Without stereopsis is not possible.

The idea of using a scanline or slit scan technique for video is nothing new, as Golan Levin's excellent catalogue demonstrates, but to my knowledge, this is the first time his is done in stereoscopic 3D.


The real-time interactive version presented on a 3D screen from Zalman (passive polarising filters and glasses) in portrait orientation. The application is written in Apple Quartz Composer with a custom Core Image filter for real-time processing.



Video docu monoscopic version



Performance at the Beyond 3D Festival at the ZKM Centre for Art and Media Karlsruhe


May 26-29 2011.
This version is a filmic version (~5min) with a multi-channel sound track composed by Ludger Bruemmer. The sounds are spatialised in the ZKM Klangdome, based on visualisation parameters. About 15 performances during the 3 day festival where conducted in the ZKM Kubus.


ZKM Kubus


Screengrab of performance software. Spatial (x, z) and luminance data at the scanline location is generated in real-time and sent through OSC comands to the sound spatialisation application (Zirkonium, ZKM).



Stereoscopic version on a passive 3D screen. This exhibition version includes turning the screen as an interface to switch between two applications, one for portrait mode and another for landscape.


Exhibitions:

SEAM Agency and Interaction, Somatic Embodiment, Agency & Mediation in Digital Mediated Environments (Critical Path, University of Western Sydney). Drill Hall, Rushcutter Bay, Sydney. Oct 2010.

Performances at the Beyond Festival 3Days of Dimension, ZKM Centre for Art and Media Karlsruhe. 26-29 May 2011. With music in the Klangdome by Ludger Bruemmer.



Acknowledgements


Based on Double District by Saburo Teshigawara with Volker Kuchelmeister, 2008
Performer Saburo Teshigawara and Rihoko Sato
Co-produced by: Karas Tokyo, Epidemic (Paris, Berlin), Le Volcan Scène nationale, Le Havre, UNSW iCinema Centre, Sydney, and kindly supported by Museum Victoria.

Double District, 2008
Direction, choreography, lighting design and costumes: Saburo Teshigawara.
Developed with: Volker Kuchelmeister
Performed by: Saburo Teshigawara and Rihoko Sato
Production manager, technical director, stereoscopic cinematography, video and audio post-production: Volker Kuchelmeister (iCinema)
Lighting design: Paul Nichola, Lighting technician: Rob Kelly (NIDA), Production assistant: Sue Midgely (iCinema)

Producer: Richard Castelli (Epidemic)
Co-produced by: Karas, Tokyo, Epidemic (Paris, Berlin), Le Volcan Scène nationale, Le Havre, UNSW University of New South Wales iCinema Centre, Sydney, and kindly supported by Museum Victoria.
Voxel reconstruction: Anuraag Sridhar, UNSW School of Computer Science and Engineering
ReActor Hexagonal Sterescopic Projection Environment
Conceived by Jeffrey Shaw and Sarah Kenderdine