Results 51 to 60 of about 1,353 (200)

Estimating Intrinsic Camera Parameters from the Fundamental Matrix Using an Evolutionary Approach

EURASIP Journal on Advances in Signal Processing, 2004
Calibration is the process of computing the intrinsic (internal) camera parameters from a series of images. Normally calibration is done by placing predefined targets in the scene or by having special camera motions, such as rotations.
Roth Gerhard, Whitehead Anthony
doaj   +1 more source

Parallel PWMs Based Fully Digital Transmitter with Wide Carrier Frequency Range

The Scientific World Journal, 2013
The carrier-frequency (CF) and intermediate-frequency (IF) pulse-width modulators (PWMs) based on delay lines are proposed, where baseband signals are conveyed by both positions and pulse widths or densities of the carrier clock.
Bo Zhou, Kun Zhang, Wenbiao Zhou, Yanjun Zhang, Dake Liu   +4 more
doaj   +1 more source

Sensors Auto-calibration Method - Using Programmable Interface Circuit Front-end

Sensors, 2003
In this paper we present a standard auto-calibration method of sensors. The purpose is to correct the accumulated errors at the sensor output. A universal conditioning circuit is used with the sensor, and the transfer function of the measurement chain is
D. Kourtiche, M. Nadi, M. Kouider
doaj   +1 more source

Active thermo-reflectometry for absolute temperature measurement by infrared thermography on specular materials

Scientific Reports, 2022
Knowledge of material emissivity maps and their true temperatures is of great interest for contactless process monitoring and control with infrared cameras when strong heat transfer and temperature change are involved. This approach is always followed by
Thomas Lafargue-Tallet, Romain Vaucelle, Cyril Caliot, Abderezak Aouali, Emmanuelle Abisset-Chavanne, Alain Sommier, Raymond Peiffer, Christophe Pradere   +7 more
doaj   +1 more source

Autocalibration of high precision drift tubes

, 1997
We present the results on MDT (monitored drift tubes) autocalibration studies obtained from the analisys of the data collected in Summer 1995 on the H8B Muon Test Beam.
L. Pontecorvo, Lanza, A, BINI, Cesare, P. Gauzzi, S. Rosati, S. Veneziano, M. Fraternali, DE ZORZI, Guido, C. Bacci, G. Casellotti, A. Lanza, Gauzzi, P, M. Livan, Nisati, A, Bacci, C, M. Cambiaghi, Ciapetti, G, Livan, M, Vercesi, V, G. Polesello, A. Nisati, GAUZZI, Paolo, Conta, C, Fraternali, M, Lacava, F, Bini, C, Rosati, S, V. Vercesi, G. De Zorzi, De Zorzi, G, A. Rimoldi, LACAVA, Francesco, C. Bini, C. Conta, Casselotti, G, G. Ciapetti, Polesello, G, Rimoldi, A, Cambiaghi, M, Pontecorvo, L, CIAPETTI, Guido, Veneziano, Stefano, F. Lacava   +42 more
core   +1 more source

Autocalibration of gyroscope based two-step regulator for autonomous vehicles.

MATEC Web of Conferences, 2018
In this article was presented an auto calibration algorithm based on a two-step regulator and gyroscope readings. Unable to use PID, as the PWM signal causes the motors to overheat, it was decided to introduce a two-step algorithm.
Wasilewski Piotr, Chojnowski Krystian, Grądzki Rafał   +2 more
doaj   +1 more source

Sparse Auto-Calibration for Radar Coincidence Imaging with Gain-Phase Errors

Sensors, 2015
Radar coincidence imaging (RCI) is a high-resolution staring imaging technique without the limitation of relative motion between target and radar. The sparsity-driven approaches are commonly used in RCI, while the prior knowledge of imaging models needs ...
Xiaoli Zhou, Hongqiang Wang, Yongqiang Cheng, Yuliang Qin   +3 more
doaj   +1 more source

Breathheld autocalibrated phase‐contrast imaging [PDF]

Journal of Magnetic Resonance Imaging, 2010
AbstractPurpose:To compare generalized autocalibrating partially parallel acquisitions (GRAPPA), modified sensitivity encoding (mSENSE), and SENSE in phase‐contrast magnetic resonance imaging (PC‐MRI) applications.Materials and Methods:Aliasing of the torso can occur in PC‐MRI applications.
Calvin, Lew, Marcus T, Alley, Daniel M, Spielman, Roland, Bammer, Frandics P, Chan   +4 more
openaire   +2 more sources

Active Electromagnetic Interference Suppression for MRI and Proton Resonance Frequency Shift Thermometry During MRI‐Guided Microwave Ablation

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a software‐based active electromagnetic interference (EMI) suppression (AES) framework on whole‐body multi‐channel MRI systems for reliable MRI and MR thermometry during MRI‐guided microwave ablation (MWA). Methods In addition to primary imaging coils, an unloaded standard body array coil was positioned outside the imaging ...
Qing Dai, Jason Chiang, Shu‐Fu Shih, Wenqi Zhou, David S. K. Lu, Holden H. Wu   +5 more
wiley   +1 more source

Zero‐Shot Self‐Supervised Learning of Single Breath‐Hold Magnetic Resonance Cholangiopancreatography (MRCP) Reconstruction

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To investigate the feasibility of zero‐shot self‐supervised learning reconstruction for reducing breath‐hold times in magnetic resonance cholangiopancreatography (MRCP). Methods Breath‐hold MRCP was acquired from 11 healthy volunteers on 3T scanners using an incoherent k‐space sampling pattern, leading to a 14‐s acquisition time and an
Jinho Kim, Marcel Dominik Nickel, Florian Knoll   +2 more
wiley   +1 more source