Publication,
Research,
Docs and Info,
KAMEDA

When the dynamic objects are imaged by a camera **i**, they exist within
frustums that circumscribe their projected regions on the image
and whose apexes are focus point of the camera. We call all the
projected regions in the same image together a * dynamic region*
and let us denote a subspace consisting of these viewing
frustums by .

As the dynamic objects can exist only outside , we only
care a subspace named * existence shadow subspace* (ESS)
defined by Equation (1).

The dynamic objects exist somewhere inside .

In the case where the dynamic objects are imaged by **n** cameras, they
exist within the product of all of these frustums. We denote this
subspace as where

Suppose there are **n** cameras in the real space and the cameras capture
images simultaneously. We call this set of images * a frame*. 3D
reconstruction process named * 3D composer* can generate
at each frame in the condition that it is given because and the focus positions of the
cameras are given in advance. Since is described by a binary
image, the amount of transferred data is quite small.

This 3D reconstruction calculation in Equation (2) is easily expanded to parallel distributed computing because several 3D composers can reconstruct different subspaces simultaneously. Thus we achieve spatio-division of the 3D reconstruction process based on the locality of 3D reconstruction calculation.

In the actual implementation, 3D composer generates by voxel representation.

Mon Sep 21 11:42:41 JST 1998