Results 11 to 20 of about 229,381 (295)

On Subgradient Projectors [PDF]

open access: yesSIAM Journal on Optimization, 2015
The subgradient projector is of considerable importance in convex optimization because it plays the key role in Polyak's seminal work - and the many papers it spawned - on subgradient projection algorithms for solving convex feasibility problems. In this paper, we offer a systematic study of the subgradient projector.
Bauschke, Heinz H.   +3 more
openaire   +2 more sources

Efficient and accurate projector calibration method based on phase-shifting method with sinusoidal structured light

open access: yesHeliyon, 2023
Objective: Projector calibration is one of the most basic and important steps in structured light three-dimensional measurement. However, such as complicated calibration process and low accuracy are still the inevitable problems in the calibration ...
Wenguo Li   +3 more
doaj   +1 more source

Projector Compensation Framework Using Differentiable Rendering

open access: yesIEEE Access, 2022
Projection mapping is a widely adopted technique in various applications. A typically projector-camera system consists of a projector and camera pair where a projector emits an application-specific input image onto a surface, and the camera captures the ...
Jino Park, Donghyuk Jung, Bochang Moon
doaj   +1 more source

Encapsulated thermoacoustic projector based on freestanding carbon nanotube film [PDF]

open access: yes, 2017
A suspended nanotube film (or films) producing sound by means of the thermoacoustic (TA) effect is encapsulated between two plates, at least one of which vibrates, to enhance sound generation efficiency and protect the film.
Aliev, Ali E., Baughman, Ray H.
core   +1 more source

Flat deformation of a spacetime admitting two Killing fields [PDF]

open access: yes, 2010
It is shown that given an analytic Lorentzian metric on a 4-manifold, $g$, which admits two Killing vector fields, then it exists a local deformation law $\eta = a g + b H$, where $H$ is a 2-dimensional projector, such that $\eta$ is flat and admits the ...
Choquet-Bruhat Y   +9 more
core   +3 more sources

Touch Sensing for a Projected Screen Using Slope Disparity Gating

open access: yesIEEE Access, 2021
This paper introduces a novel touch sensing system for a projected screen with a single camera. To achieve touch sensing with camera image, there are two challenges to overcome.
Mayuka Tsuji   +4 more
doaj   +1 more source

A Novel Low-Cost Adaptive Scanner Concept for Mobile Robots

open access: yesIngeniería e Investigación, 2014
A fundamental problem in mobile robot applications is the need for accurate knowledge of the position of a vehicle for localizing itself and for avoiding obstacles in its path.
Ivo Stančić, Josip Music, Mojmil Cecic
doaj   +1 more source

Spin 3/2 Beyond the Rarita-Schwinger Framework [PDF]

open access: yes, 2006
We employ the two independent Casimir operators of the Poincare group, the squared four--momentum, P^2, and the squared Pauli-Lubanski vector, W^2, in the construction of a covariant mass-m, and spin-3/2 projector in the four-vector-spinor, \psi_{\mu ...
Ahluwalia   +36 more
core   +2 more sources

Simple Color Calibration Method by Projection onto Retroreflective Materials

open access: yesJournal of Imaging, 2022
Retroreflective materials have the property of directional reflection, reflecting light strongly in the direction of the light source, and have been used for road traffic signs.
Yusuke Nakamura, Takahiko Horiuchi
doaj   +1 more source

Evaluation of Human Behaviour Detection and Interaction with Information Projection for Drone-Based Night-Time Security

open access: yesDrones, 2023
Night security is known for its long hours and heavy tasks. In Japan, a labor shortage of security guards has become an issue in recent years. To solve these problems, an increasing number of robotic security methods are being used.
Ryosuke Kakiuchi   +2 more
doaj   +1 more source

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