VIDEO4D Project
IMPA: National Institute of Pure and Applied
Mathematics
VISGRAF: Vision and Computer Graphics Lab
1) VIDEO4D project research team:
Coordinators: Marcelo Bernardes Vieira and Luiz Velho, IMPA
Collaborators at IMPA: Asla Sá, Paulo Cezar Carvalho and Sérgio Estevão
Collaborators:
- David da Silva Pires and Roberto Marcondes Cesar Junior, Universidade de São Paulo
Deformable connected components detection
- Ya Chang and Matthew Turk, University of California, Santa Barbara
Analysis and synthesis of facial expressions
VIDEO4D concept: A 4-dimensional video can be though as "general 3D objects changing in time". More specifically, a 4D video can represent objects, embedded in volumes, varying by any form in function of some independent variable. As a concept, no restrictions on the objects are imposed. However, its architecture involves several issues: storage, expressivity (what can be represented), transmission, scalability, compatibility, etc.
VIDEO4D file format: The current version of Video4D File (.v4d) is still a prototype that was developed to exchange the data obtained from our camera/projector real-time scanning system. This system is part of the project "4th Generation Video" and is being developed at IMPA with financial support from FINEP/Brazil.
2) V4DVIEWER application:
This application is intended to be an example of Video4dfile.c and Video4dFile.h usage for reading .v4d files. It also shows one simple example of how can we process Video4D objects: it detects geometrically connected components. This application has tools for full navigation in .V4D files:
time bar for selecting frames;
play, stop, pause, step forward, step backward toolbar;
export frames to PLY format
Disclaimer: this is an ongoing scientific project. Authors reserve the right to change the .V4D format as needed along the project's development.
System requirements:
Platform: Intel Pentium + Windows
Graphics Library: OpenGL (accelerated graphics card highly recommended)
Compiler: Microsoft Visual C 6.0
PLY library: Diego Nehab's Rply library
Download V4DVIEWER source code and executable:
v4dviewer executable file v4dviewer source code
Download Video4d files (zipped .v4d): (click images to enlarge)
- Smile (20Mb) - Smile's frame in PLY format
- Face and mouth movement (48Mb)
Download face expressions (.v4d):
- Side views (zipped .v4d files)
- Subject 1 (zipped .v4d files)
- Subject 2 (zipped .v4d files)
- Subject 3 (zipped .v4d files)
- Subject 4 (zipped .v4d files)
- Subject 5 (zipped .v4d files)
- Subject 6 (zipped .v4d files)
- Subject 7 (zipped .v4d files)
Copyright © 2004-2005 Marcelo Bernardes Vieira and Luiz Velho (IMPA - Brazil)