TERMIUM Plus®

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unsupervised classification [1 record]

Record 1 2013-12-31

English

Subject field(s)
  • Remote Sensing
  • Cartography
DEF

Any classification method where the algorithm determines the criteria for classification by examining the data.

OBS

This [classification method is used] in contrast to supervised classification methods where an analyst provides criteria for classification.

OBS

unsupervised classification: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
  • Cartographie
DEF

Méthode probabiliste d'analyse d'un fichier de données, destinée à créer des classes de pixels par des traitements mathématiques.

OBS

Les trois méthodes de classification non dirigée parmi les plus utilisées sont : les nuées dynamiques, la classification ascendante hiérarchique, l'identification des pics d'histogramme.

OBS

classification non dirigée : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Teledetección
  • Cartografía
CONT

Suponiendo que los datos han pasado ya todo tipo de correcciones de tipo geométrico o atmosférico, existen dos métodos complementarios para afrontar el problema de la generación de clases, estos son válidos tanto en imágenes de satélite como en cualquier otro campo: No establecer ninguna clase a priori, aunque es necesario determinar el número de clases que queremos establecer, y dejar que las defina un procedimiento automático (clasificación no supervisada).

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