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EP0067083A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Television camera colour correction circuit for improved image perception

Assignee: Thales SA
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Filing: 1982-05-04
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Granted: —
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Expires: 2002-05-04
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Abstract

Abstract Translated from French La correction consiste à corriger la luminance globale tout en conservant la chromaticité originelle de l'image analysée. Pour cela, le dispositif selon l'invention comporte: un circuit de correction (5) recevant des informations couleur Ve1, Ve2 et Ve3, et délivrant des informations couleurs corrigées, un circuit de matriçage (18) fournissant le signal de luminance globale Ve, et un circuit de commande (6) calculant des paramètres de transfert définissant la fonction de transfert F qui transforme le signal Ve en un signal F(Ve) couvrant l'échelle des luminances suivant une équipartition pour satisfaire à des conditions optimales de vision. Le circuit de commande (6) élabore un signal de valeur <IMAGE> et le fournit au circuit de correction (5). Ce dernier fournit des informations couleur correspondant respectivement aux produits <IMAGE> Application aux centres de production de télévision. The correction consists of correcting the overall luminance while retaining the original chromaticity of the image analyzed. For this, the device according to the invention comprises: a correction circuit (5) receiving color information Ve1, Ve2 and Ve3, and delivering corrected color information, a matrixing circuit (18) supplying the global luminance signal Ve, and a control circuit (6) calculating transfer parameters defining the transfer function F which transforms the signal Ve into a signal F (Ve) covering the scale of the luminances according to an equipartition to satisfy optimal vision conditions. The control circuit (6) generates a value signal <IMAGE> and supplies it to the correction circuit (5). The latter provides color information corresponding respectively to the products <IMAGE> Application to television production centers.

Inventors

  • 👤 Michel Favreau
  • 👤 Serge Soca
  • 👤 Jean Bajon

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-03 01:03
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/77; H04N23/00; H04N23/10; H04N23/13

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

EP0019518A1 Cited

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