Results 21 to 30 of about 12,051,715 (310)

More Accurate Pinhole Camera Calibration with Imperfect Planar Target [PDF]

open access: yes, 2011
This paper presents a novel approach to camera calibration that improves final accuracy with respect to standard methods using precision planar targets, even if now inaccurate, unmeasured, roughly planar targets can be used.
Hirzinger, Gerd   +3 more
core   +1 more source

Calibration-Free Robot-Sensor Calibration approach based on Second-Order Cone Programming

open access: yesMATEC Web of Conferences, 2018
In order to overcome the restrictions of traditional robot-sensor calibration method which solve the tool-camera transformation and robot-world transformation rely on calibration target, a calibration-free approach that solve the robot-sensor calibration
Wei Li   +3 more
doaj   +1 more source

IntCal04 terrestrial radiocarbon age calibration, 0-26 cal kyr BP [PDF]

open access: yes, 2004
A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace ImCal98, which extended from 0-24 cal kyr BP (Before Present, 0 cal BP = AD 1950).
Buck, C. E.   +171 more
core   +1 more source

Hierarchical approach to hydrological model calibration [PDF]

open access: yesEnvironmental Earth Sciences, 2017
Hydrological models have been widely used for water resources management. Successful application of hydrological models depends on careful calibration and uncertainty analysis. Spatial unit of water balance calculations may differ widely in different models from grids to hydrological response units (HRU).
Ozdemir, Ayfer   +2 more
openaire   +4 more sources

Extrinsic Calibration of Camera and 2D Laser Sensors without Overlap

open access: yesSensors, 2017
Extrinsic calibration of a camera and a 2D laser range finder (lidar) sensors is crucial in sensor data fusion applications; for example SLAM algorithms used in mobile robot platforms. The fundamental challenge of extrinsic calibration is when the camera-
Khalil M. Ahmad Yousef   +3 more
doaj   +1 more source

Calibration of Stereo Pairs Using Speckle Metrology

open access: yesSensors, 2022
The accuracy of 3D reconstruction for metrology applications using active stereo pairs depends on the quality of the calibration of the system. Active stereo pairs are generally composed of cameras mounted on tilt/pan mechanisms separated by a constant ...
Éric Samson   +2 more
doaj   +1 more source

Approaches to Photometric Calibrations [PDF]

open access: yesSymposium - International Astronomical Union, 1985
In this review an examination will be made of the experimental conditions which must be satisfied by multicolor photometric systems if the observational parameters are to be correlated unequivocally with physical quantities of the star. An inventory of error sources disturbing such calibrations contains: instability of the natural system, procedures of
openaire   +1 more source

Over-the-Air Calibration of mmW Imaging Radars Using Uncorrelated Continuous Wave Signals

open access: yesIEEE Journal of Microwaves, 2023
Magnitude and phase variations of radio-frequency channels in multiple-input multiple-output imaging radars require an accurate calibration in order to reduce side-lobe levels in the radar image and thus counteract missed detections.
Simon Heining   +3 more
doaj   +1 more source

A Flexible Calibration Approach for Cameras with Double-Sided Telecentric Lenses

open access: yesInternational Journal of Advanced Robotic Systems, 2016
With their constant perspective and large magnification in the working distance, double-sided telecentric lenses have been widely used in machine-vision applications.
Linshen Yao, Haibo Liu
doaj   +1 more source

Towards dynamic camera calibration for constrained flexible mirror imaging [PDF]

open access: yes, 2008
Flexible mirror imaging systems consisting of a perspective camera viewing a scene reflected in a flexible mirror can provide direct control over image field-of-view and resolution. However, calibration of such systems is difficult due to the vast range
Dunne, Aubrey K.   +2 more
core   +2 more sources

Home - About - Disclaimer - Privacy