Depth Map (Our Technique)
The goal of this work is to
build an end-to-end system for structured light 3D scanning
under a broad range of global illumination effects, such as
inter-reflections, diffusion and sub-surface scattering. We
have designed structured light patterns that are resilient
to individual global illumination effects using simple
logical operations and tools from combinatorial mathematics.
Scenes exhibiting multiple phenomena are handled by
combining results from a small ensemble of such patterns.
Our methods can be readily incorporated into existing
scanning systems without a significant overhead in terms of
capture time or hardware.
Mohit
Gupta,
Amit Agrawal, Ashok Veeraraghavan, Srinivasa G. Narasimhan
IEEE
Computer
Vision and Pattern Recognition (CVPR) 2011
"Structured
Light 3D Scanning in the Presence of Global Illumination"
The scene shown above has
significant global illumination in the form of
interreflections and sub-surface scattering. Conventional
Gray codes and phase-shifting result in errors at points
receiving inter-reflections. Modulated phase-shifting
produces errors on translucent fruits. In contrast, the
depth map computed using our techniques is nearly error
free. Please see the compilation of results below for more
examples.
Presentation with Results
Gallery
of Results (Click on images for details)
Illustration
of our techniques on simple shapes
Concave Bowl on Marble Slab
