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IMAGE LAG [3 records]

Record 1 2012-09-25

English

Subject field(s)
  • Vacuum Tubes (Electronics)
  • Photoelectricity and Electron Optics
CONT

Older image intensifier tubes had phosphors with lag times on the order of 30–40 msec [milliseconds]. Current image intensifier tubes have lag times of approximately 1 msec.

OBS

image intensifier tube: term officially approved by the Electronics and Telecommunications Terminology Committee.

French

Domaine(s)
  • Tubes et lampes (Électronique)
  • Photo-électricité et optique électronique
CONT

Les méthodes d'examen permettant d'effectuer un tel contrôle de qualité, telles que la méthode Lang, sont basées sur la sensibilisation d'un film photographique, par un faisceau de rayons X diffracté par le cristal. La sensibilité de ces méthodes peut être considérablement accrue en utilisant un tube intensificateur d'image sensible aux rayons X, et spécialement étudié pour ce problème.

OBS

tube intensificateur d'image; tube amplificateur d'image : termes uniformisés par le Comité d’uniformisation des termes de l’électronique et des télécommunications (CUTEL).

Spanish

Campo(s) temático(s)
  • Tubos de vacío (Electrónica)
  • Fotoelectricidad y óptica electrónica
Save record 1

Record 2 2010-08-11

English

Subject field(s)
  • Remote Sensing
DEF

The smallest usable element of an image.

CONT

For applications such as cartography, where it is important to precisely locate the correct position of features such as roads and boundaries, it has been difficult or impossible to evaluate the relative performance of different sensors through the standard specifications of IFOV [Instantaneous Field of View] or spatial resolution. In an effort to overcome this difficulty, a second concept... labeled spatial effective resolution element(SERE), is evolving. Although this concept is not fully developed, it provides an indication of the factors to be taken into account when attempting to correlate different systems. These factors include : surface area on the Earth, or its equivalent on the image plane, the IFOV and the spread function resulting from optical diffraction and aberrations as well as electronic lag or smear. Essentially, the concept of SERE is an attempt to determine the IFOV of the hypothetical, unsampled(ideal) scanning system which would yield performance equivalent to that of any given real sensor system. Whether such an equivalence exists is yet to be determined.

OBS

spatial effective resolution element; SERE: term and abbreviation officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
DEF

Plus petit élément utilisable de l'image.

OBS

élément de résolution spatiale efficace : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Save record 2

Record 3 1996-12-09

English

Subject field(s)
  • Artificial Intelligence
  • Computer Graphics
  • Photoelectricity and Electron Optics
  • Micrographics
DEF

Persistence of image information in an image sensor for two or more scan periods after removal of excitation. [ISO/CEI JTC N1746, 1995]

French

Domaine(s)
  • Intelligence artificielle
  • Infographie
  • Photo-électricité et optique électronique
  • Micrographie
OBS

Termes retenus dans ISO/CEI JTC N1746, 1995.

Spanish

Save record 3

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