Systems and methods for adjusting image contrast

Details Systems and methods for adjusting image contrast Systems and methods for adjusting image contrast

H - Electricity

04

N

H04N 5/52 (2006.01) H04N 5/14 (2006.01) H04N 5/46 (2006.01) H04N 5/57 (2006.01)

Patent

CA 2501468

Systems and methods (200-1) for adjusting image contrast are provided. An exemplary method for adjusting image contrast includes determining (228) a format of a television signal (202) and outputting in conjunction with the television signal a reference level (206). If the television signal has a first format, then the reference level is caused to be substantially equal to a luminance level representing a black color in the first format. However, if the television signal has a second format, then the reference level is caused to be substantially equal to a luminance level representing a black color in the second format.

L'invention concerne des systèmes et des procédés pour le réglage de contraste d'image, par exemple avec détermination d'un format de signal de télévision et fourniture correspondante d'un niveau de référence à la sortie. Si ledit signal présente un premier format, le niveau de référence est établi à un niveau sensiblement égal à un niveau de luminance représentant une couleur noire dans le premier format. Mais si ce signal présente un second format, le niveau de référence est établi à un niveau sensiblement égal à un niveau de luminance représentant une couleur noire dans le second format.

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