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Search Publications by: Javier Bernal (Assoc)

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Displaying 51 - 75 of 94

LINDENS: A program for lineament length and density analysis

November 1, 2000
Author(s)
Antonio M. Casas, Angel Cortes, Adolfo Maestro, M. Asuncion Soriano, Andres Riaguas, Javier Bernal
Analysis of lineaments from satellite images normally includes the determination of their orientation and density. The spatial variation in the orientation and/or number of lineaments must be obtained by means of a network of cells, the lineaments included

Field Demonstration of Laser Scanning for Excavation Measurement

October 1, 2000
Author(s)
Geraldine S. Cheok, Robert R. Lipman, Christoph J. Witzgall, Javier Bernal, William C. Stone
The use of a scanning laser to measure terrain changes due to excavation at a construction site is described. The objective at this phase of the project is to develop the tools necessary to measure terrain changes in real-time. This paper focuses on

Triangulation-Based L 1 -fitting of Terrain Surfaces

June 1, 1999
Author(s)
Javier Bernal, Christoph J. Witzgall
Given a planar triangulation, the goal is to select elevations at its vertices so that resulting piecewise-linear triangulated surface approximates specified elevations using the L 1-norm as the primary measure-of-fit. Several suboptimal algorithms

Probabilistic computation of Poiseuille flow velocity fields

May 1, 1995
Author(s)
Fern Y. Hunt, J. F. Douglas, Javier Bernal
Velocity fields for Poiseuille flow through tubes having general cross section are calculated using a path integral method involving the first‐passage times of random walks in the interior of the cross sectional domain D of the pipe. This method is applied

Inserting line segments into triangulations and tetrahedralizations

March 1, 1995
Author(s)
Javier Bernal
In this paper, we further develop an algorithm by Bernal, De Floriani, and Puppo, for inserting a line segment into a Constrained Delaunay triangulation. The new version of the algorithm inserts the line segment in exactly the same manner in which the old

Bibliographic notes on voronoi diagrams

April 1, 1993
Author(s)
Javier Bernal
This paper presents a comprehensive annotated bibliography on various theoretical and algorithmic aspects of Voronoi diagrams and related diagrams. Bibliographic notes on the relationship between Voronoi diagrams and solutions to the Euclidean traveling

Computing Delaunay triangulations for comet-shaped polygons

November 1, 1991
Author(s)
Javier Bernal
In this paper, we present two triangulation algorithms which combined produce an algorithm for computing Delaunay triangulations for comet-shaped polygons. The first algorithm constructs in linear time a triangulation for a comet-shaped polygon. The second
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