Enabling multi-party 3D tele-immersive environments with ViewCast
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
Enabling multiparty 3D tele-immersive environments with ViewCast
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
VoC: a reconfigurable matrix for stereo vision processing
IPDPS'06 Proceedings of the 20th international conference on Parallel and distributed processing
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In telepresence applications each user is immersed in arendered 3D-world composed from representations transmittedfrom remote sites. The challenge is to compute denserange data at high frame rates, since participants cannoteasily communicate if the processing cycle or network latenciesare long. Moreover, errors in new stereoscopicviews of the remote 3D-world should be hardly perceptible.To achieve the required speed and accuracy, we use trinocularstereo, a matching algorithm based on the sum of modifiednormalized cross-correlations, and subpixel disparityinterpolation. To increase speed we use Intel IPL functionsin the pre-processing steps of background subtractionand image rectification as well as a four-processor parallelization.To evaluate our system we have developed a test-bedwhich provides a set of registered dense "ground-truth"laser data and image data from multiple views.