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EP0078282A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

A method of displaying on a viewing screen the output signals from a detector sensitive to radiation.

Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1982-04-23
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Granted: —
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Expires: 2002-04-23
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Abstract

Abstract Translated from English Lors de l'affichage sur un ecran d'une image produite par les signaux de sortie d'un detecteur sensible aux radiations, par exemple un detecteur d'infrarouges, il peut arriver que des details de faible contraste dans l'image soient perdus lorsque l'intensite lumineuse de l'image couvre une gamme d'intensite trop elevee. Dans un procede permettant d'eviter cette perte de details, l'amplification des parties de basse frequence des signaux video est regulee de maniere adaptive en calculant deux parametres statistiques, caracteristiques des proprietes statistiques des valeurs des signaux, et en regulant l'amplification de maniere qu'une intensite d'image selectionnee corresponde aux parametres calcules. When displaying on a screen an image produced by the output signals of a radiation sensitive detector, for example an infrared detector, it may happen that low contrast details in the image are lost when the light intensity of the image covers too high an intensity range. In a method to avoid this loss of detail, the amplification of the low frequency parts of the video signals is adaptively regulated by calculating two statistical parameters, characteristic of the statistical properties of the values of the signals, and by regulating the amplification of the signal. so that a selected image intensity matches the calculated parameters.

Inventors

  • 👤 Eskel Egerod
  • 👤 Lars Yngve Anders Yngvesson

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-10 02:17
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/70; H04N23/76; H04N5/00; H04N5/14; H04N5/20

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