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IMAGE SUBTRACTION [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2024-11-19

English

Subject field(s)
  • Radiography (Medicine)
OBS

The procedure is based on the principle that two digital radiographic images obtained under different time intervals, with the same projection geometry, are spatially and densitometrically aligned using specific software. When the two images are registered and intensities of corresponding pixels are subtracted of the gray scale values, a uniform difference image is produced, resulting in a new image representing the differences between the two, called the subtraction image. In this new image, if there is a change in the radiographic attenuation between the baseline and follow-up examination, all the anatomical structures that do not change between radiographs are shown as neutral gray background, while regions that had mineral loss or gain are shown as a darker or brighter area, respectively...

French

Domaine(s)
  • Radiographie (Médecine)

Spanish

Campo(s) temático(s)
  • Radiografía (Medicina)
CONT

El procesamiento informático de imágenes radiográficas, como la radiografía de sustracción digital, ha proporcionado una alta sensibilidad y especificidad para la detección de pequeños cambios óseos que no se pueden lograr en muchas especialidades médicas que requieren imágenes del soporte óseo.

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Record 2 2024-01-27

English

Subject field(s)
  • Artificial Intelligence
  • Computer Graphics
  • Micrographics
DEF

A system that features analog video enhancement and digital image processing through frame memories that permit subtraction, averaging, filtering, and other functions to improve image contrast and definition.

French

Domaine(s)
  • Intelligence artificielle
  • Infographie
  • Micrographie
OBS

Voir analyseur d'images, processeur d'images.

Key term(s)
  • système de traitement d'images

Spanish

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Record 3 1996-12-09

English

Subject field(s)
  • Response Systems (Electronic Instrumentation)
  • Adaptive Automated Systems
  • Computer Graphics
  • Applications of Automation
DEF

Image enhancement operation that involves the addition or subtraction of a constant brightness to all pixels in an image.

French

Domaine(s)
  • Systèmes cybernétiques de réaction
  • Systèmes automatiques adaptatifs
  • Infographie
  • Automatisation et applications
OBS

Terme tiré de ISO/CEI JTC N1746, 1995.

Spanish

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Record 4 1996-12-09

English

Subject field(s)
  • Mathematical Geography
  • Aerial-Photography Prospecting
  • Computer Graphics
  • Applications of Automation
DEF

Process in which each pixel value of one image is subtracted from its corresponding pixel value in another image. (WD, ISO 2382-30 Computer Vision, 1994).

OBS

Image subtraction is used in applications requiring error detection by the vision system.

French

Domaine(s)
  • Géographie mathématique
  • Prospection par photographie aérienne
  • Infographie
  • Automatisation et applications
DEF

Soustraction de chaque valeur de pixel d'une image de la valeur de pixel correspondante dans une autre image. [ISO/CEI JTC N1746, 1995]

Spanish

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Record 5 1996-12-09

English

Subject field(s)
  • Artificial Intelligence
  • Computer Graphics
  • Applications of Automation
DEF

Image-creating operation determining each pixel of a new image by subtracting corresponding pixels of other images.

French

Domaine(s)
  • Intelligence artificielle
  • Infographie
  • Automatisation et applications
DEF

Image obtenue en retranchant les valeurs de pixels d'une image des valeurs de pixels correspondantes d'une autre image.

Spanish

Save record 5

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