Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 3-D Rigid Models from Partial Views - Global Factorization   The so-called factorization methods recover 3-D rigid structure from motion
by factorizing an observation matrix that collects 2-D projections of features.
These methods became popular due to their robustness - they use a large number
of views, which constrains adequately the solution - and computational
simplicity - the large number of unknowns is computed through an SVD, avoiding
non-linear optimization. However, they require that all the entries of the
observation matrix are known. This is unlikely to happen in practice, due to
self-occlusion and limited field of view. Also, when processing long videos,
regions that become occluded often appear again later. Current factorization
methods process these as new regions, leading to less accurate estimates of 3-D
structure. In this paper, we propose a global factorization method that infers
complete 3-D models directly from the 2-D projections in the entire set of
available video frames. Our method decides whether a region that has become
visible is a region that was seen before, or a previously unseen region, in a
global way, i.e., by seeking the simplest rigid object that describes well the
entire set of observations. This global approach increases significantly the
accuracy of the estimates of the 3-D shape of the scene and the 3-D motion of
the camera. Experiments with artificial and real videos illustrate the good
performance of our method.

20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat