Results 171 to 180 of about 4,725,620 (197)

A digital topology-based method for the topological filtering of a reconstructed surface

SPIE Proceedings, 2011
In this paper, we use concepts from digital topology for the topological filtering of reconstructed surfaces. Given a finite set S of sample points in 3D space, we use the voronoi-based algorithm of Amenta & Bern to reconstruct a piecewise-linear approximation surface in the form of a triangular mesh with vertex set equal to S.
Madjid Allili, Donglei Li, Mouhand Saïd Allili   +2 more
openaire   +2 more sources

Thinning-based topological exploration using position probability of topological nodes

Proceedings 2006 IEEE International Conference on Robotics and Automation, 2006. ICRA 2006., 2006
A grid map can be efficiently used in navigation, but this type of map requires a large amount of memory in proportion to the size of the environment. As an alternative, a topological map can be used to represent the environment in terms of discrete nodes with edges connecting them.
Tae-Bum Kwon, Jae-Bok Song
openaire   +2 more sources

Topology recognition of 3D closed freeform objects based on topological graphs

Proceedings of the sixth ACM symposium on Solid modeling and applications, 2001
Reverse engineering (RE) deal with an enormous number of irregular and scattered digitized points that require intensive processing in order to reconstruct the surfaces of an object. Surface reconstruction of freeform objects is based on geometrical and topological criteria. Current fitting methods reconstruct an object using a bottom-up approach, from
Dvir Steiner, Anath Fischer
openaire   +1 more source

Topological characteristics of free bases of topological groups and topological vector spaces

Journal of Mathematical Sciences, 1998
See the review in Zbl 0887.54033.
openaire   +1 more source

Digital topology: a comparison of the graph-based and topological approaches

1991
Abstract In image processing, the study of the topologiral properties of binary images has usually been based on adjacency relations defined on the black and white point sets (most often a combination of the so-called 4-, 8-, 6-, 18-. and 26-adjacency relations). We call this the graph based approach to digital topology.
T Y Kong, Axd A Rosenfeld
openaire   +1 more source

Topological Algebras with Bases

1978
Let A be a topological algebra. A (Schauder) basis {xn} in A is called an orthogonal basis if xnxm = δnmxn, n,m ε N (δ denotes Kronecker's delta). A basis in A of the form {zⁿ : n=0,1,...}, z ɛ A, is called a cyclic basis. This thesis is concerned with the structure of topological algebras possesing bases of these types.
openaire   +2 more sources

Clinical Highlights From the National Cancer Data Base: 1994

Ca-A Cancer Journal for Clinicians, 1994
David J Winchester, Glenn D Steele, R T Osteen   +2 more
exaly  

Preliminary Report of the National Cancer Data Base

Ca-A Cancer Journal for Clinicians, 1991
Herman R Menck, L Garfinkel
exaly  

Clinical Highlights From the National Cancer Data Base: 1995

Ca-A Cancer Journal for Clinicians, 1995
David J Winchester, Glenn D Steele, Herman R Menck   +2 more
exaly  

The National Cancer Data Base

Ca-A Cancer Journal for Clinicians, 1991
G P Murphy
exaly