Results 1 to 10 of about 127,969 (344)

The photometric scale [PDF]

open access: greenJournal of the Franklin Institute, 1919
n ...
Herbert E. Ives
openalex   +4 more sources

Thermodynamic and structural studies of complexes of manganese(II), cobalt(II), nickel(II) and copper(II) with aminofuropyridine carboxamide [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
Complexes of Mn(II), Co(II), Ni(II) and Cu(II) with 2-aminofuro[3,2-b]pyridine-3-carboxamide have been prepared. The stability constants of the formed complexes were determined at 20, 30, 40 and 50ºC at a fixed ionic strength, I = 0.1 mol dm-3 (KCl). The
M. G. ABD EL WAHED
doaj   +3 more sources

THE ALHAMBRA PHOTOMETRIC SYSTEM [PDF]

open access: yesThe Astronomical Journal, 2010
Astronomical Journal on the 14th of January ...
Francisco J. Castander   +24 more
openaire   +10 more sources

An Attempt to Construct an Activity Cycle Catalog with Kepler Long-Cadence Light Curves

open access: yesUniverse, 2022
Many stars show activity cycles like the Sun. Kepler has gathered ∼200,000 light curves. Most of the Kepler stars only have long-cadence light curves, which limits their applicable methods.
Yu-Fu Shen, Gang Zhao, Sarah A. Bird
doaj   +1 more source

The New Ephemeris and Light Curve Analysis of V870 Ara by the Ground-Based and TESS Data

open access: yesOpen Astronomy, 2021
New CCD photometric observations and their investigation of the W UMa-type binary, V870 Ara, are presented. Light curves of the system were taken through BVIfilters from the Congarinni Observatory in Australia.
Poro Atila   +6 more
doaj   +1 more source

Photometric Segmentation: Simultaneous Photometric Stereo and Masking [PDF]

open access: yes2019 International Conference on 3D Vision (3DV), 2019
This work is concerned with both the 3D-reconstruction of an object using photometric stereo, and its 2D-segmentation from the background. In contrast with previous works on photometric stereo which assume that a mask of the area of interest has been computed beforehand, we formulate 3D-reconstruction and 2D-segmentation as a joint problem.
Haefner, Bjoern   +2 more
openaire   +2 more sources

The GALANTE photometric system [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2019
This paper describes the characterization of the GALANTE photometric system, a seven intermediate- and narrow-band filter system with a wavelength coverage from 3000 $ $ to 9000 $ $ . We describe the photometric system presenting the full sensitivity curve as a product of the filter sensitivity, CCD, telescope mirror, and atmospheric transmission ...
Pedro García-Lario   +12 more
openaire   +4 more sources

Photometric Visual Servoing [PDF]

open access: yesIEEE Transactions on Robotics, 2011
This paper proposes a new way to achieve robotic tasks by 2D visual servoing. Indeed, instead of using classical geometric features such as points, straight lines, pose or a homography, as is usually done, the luminance of all pixels in the image is here considered.
Collewet, Christophe, Marchand, Eric
openaire   +3 more sources

Photometric stereo endoscopy [PDF]

open access: yesJournal of Biomedical Optics, 2013
While color video endoscopy has enabled wide-field examination of the gastrointestinal tract, it often misses or incorrectly classifies lesions. Many of these missed lesions exhibit characteristic three-dimensional surface topographies. An endoscopic system that adds topographical measurements to conventional color imagery could therefore increase ...
Parot Fernández, Vicente José   +6 more
openaire   +5 more sources

Multiview Photometric Stereo [PDF]

open access: yesIEEE Transactions on Pattern Analysis and Machine Intelligence, 2008
This paper addresses the problem of obtaining complete, detailed reconstructions of textureless shiny objects. We present an algorithm which uses silhouettes of the object, as well as images obtained under changing illumination conditions. In contrast with previous photometric stereo techniques, ours is not limited to a single viewpoint but produces ...
Roberto Cipolla   +2 more
openaire   +3 more sources

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