Results 211 to 220 of about 4,762,893 (253)

The Geometry of First-Returning Photons for Non-Line-of-Sight Imaging

Computer Vision and Pattern Recognition, 2017
Non-line-of-sight (NLOS) imaging utilizes the full 5D light transient measurements to reconstruct scenes beyond the cameras field of view. Mathematically, this requires solving an elliptical tomography problem that unmixes the shape and albedo from ...
Chia-Yin Tsai, Kiriakos N. Kutulakos, S. Narasimhan, Aswin C. Sankaranarayanan   +3 more
semanticscholar   +1 more source

Compact dualband bandpass filter with two transmission zeros using dual‐mode microstrip resonator and tapped‐line geometry

, 2011
In this article, the dualband bandpass filters (BPFs) using dual‐mode resonator are designed and implemented. Also, the J‐inverter is investigated as function of the impedance and the electrical length of the open‐stub in the dual‐mode λg/2 microstrip ...
T. Yun, Sun-Kuk Noh, Hyung-Jong Kim, Euy-Kyo Oh, H. Son, Jong‐Chul Lee   +5 more
semanticscholar   +1 more source

Singularity Analysis of Large Workspace 3RRRS Parallel Mechanism Using Line Geometry and Linear Complex Approximation

, 2011
During the last 15 years, parallel mechanisms (robots) have become more and more popular among the robotics and mechanism community. Research done in this field revealed the significant advantage of these mechanisms for several specific tasks, such as ...
A. Wolf, D. Glozman
semanticscholar   +1 more source

Singularity Analysis of a Three-Leg Six-Degree-of-Freedom Parallel Platform Mechanism Based on Grassmann Line Geometry

Int. J. Robotics Res., 2001
This paper addresses the determination of the singularity loci of a six-degree-of-freedom spatial parallel platform mechanism of a new type that can be statically balanced.
B. Monsarrat, C. Gosselin
semanticscholar   +1 more source

Three-Dimensional Generalizations of Reuleaux’s and Instant Center Methods Based on Line Geometry

, 2010
In kinematics, the problem of motion reconstruction involves generation of a motion from the specification of distinct positions of a rigid body. In its most basic form, this problem involves determination of a screw displacement that would move a rigid ...
Jasem Baroon, B. Ravani
semanticscholar   +1 more source

High-displacement piezoelectric actuator utilizing a meander-line geometry I. Experimental characterization

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1991
The compact linear-motion piezoelectric actuator developed has relatively large displacement capabilities. It is composed of a number of parallel bars of lead zirconium titanate (PZT) connected together in a meander-line configuration so that they are ...
W. Robbins, D. Polla, D. Glumac
semanticscholar   +1 more source

Computing distances between surfaces using line geometry

Pacific Conference on Computer Graphics and Applications, Proceedings, 2002
We present an algorithm for computing the distance between two free-form surfaces. Using line geometry, the distance computation is reformulated as a simple instance of a surface-surface intersection problem, which leads to low-dimensional root finding ...
Kyung-ah Sohn, B. Jüttler, Myung-Soo Kim, Wenping Wang   +3 more
semanticscholar   +1 more source

Singularity Analysis of 5-RPRRR Parallel Mechanisms via Grassmann Line Geometry

, 2009
This paper investigates the singular configurations of five-degree-of-freedom parallel mechanisms generating the 3T2R motion and comprising five identical legs of the RP UR type.
M. T. Masouleh, C. Gosselin
semanticscholar   +1 more source

Singularity-free path planning of parallel manipulators using clustering algorithm and line geometry

IEEE International Conference on Robotics and Automation, 2003
This paper presents a numerical technique for path planning inside the workspace of parallel manipulators avoiding singularity. A generic numerical algorithm for generating the reachable workspace of parallel manipulators is described.
A. Dash, I. Chen, S. Yeo, Guilin Yang
semanticscholar   +1 more source

Collision Detection of Cylindrical Rigid Bodies Using Line Geometry

, 2005
This paper presents a novel methodology for detecting collisions of cylindrically shaped rigid bodies moving in three dimensions. This algorithm uses line geometry and dual number algebra to exploit the geometry of right circular cylindrical objects to ...
J. Ketchel, P. Larochelle
semanticscholar   +1 more source