VideoTrace: Modelação 3D Interactiva

Para quem trabalha em 3D, de certeza que ver o VideoTrace em acção o vai dexar com água na boca.
Já toda a gente viu fazer um "trace" a uma imagem num programa tipo Photoshop. O VideoTrace adiciona as 2 restantes dimensões, o "3D" e o tempo. Nada como verem o vídeo no site oficial para esclarecerem todas as dúvidas.

VideoTrace is a system for interactively generating realistic 3D models of objects from video—models that might be inserted into a video game, a simulation environment, or another video sequence.

The user interacts with VideoTrace by tracing the shape of the object to be modelled over one or more frames of the video. By interpreting the sketch drawn by the user in light of 3D information obtained from computer vision techniques, a small number of simple 2D interactions can be used to generate a realistic 3D model.
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The Siggraph paper describing VideoTrace is available here (pdf 6MB), and an avi of the video below which outlines how it works is available here (avi), with a more compressed version here (avi).

[Videotrace]