Picture signal enhancement

Details Picture signal enhancement Picture signal enhancement

2001-02-13

2009-11-17

Ometz, David L (Department: 2622)

Television

Image signal processing circuitry specific to television

Gray scale transformation

C348S673000, C348S687000, C348S652000, C382S168000, C358S522000

Reexamination Certificate

active

07619691

ABSTRACT:
In a method of picture signal enhancement, a picture signal is subjected (3, 7) to a histogram-based picture signal modification based on a luminance level distribution over a whole picture or a first part of the picture, and the histogram-based picture signal modification is locally adjusted (5) in dependence on locally measured picture signal properties other than contrast and brightness, the locally measured picture signal relating to second parts of the picture that are each substantially smaller than the whole picture or the first part of the picture, the second parts being within the whole picture or the first part of the picture. Preferably, the second parts are individual pixels.

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