White balance adjusting apparatus

Details White balance adjusting apparatus White balance adjusting apparatus

1994-03-01

1996-01-16

Greening, Wendy R.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348228, H04N 5225

Patent

active

054852021

ABSTRACT:
In a white balance adjusting apparatus, information about picture portions whose color components cannot be detected under normal conditions, e.g., picture portions whose brightness level is excessively high, or excessively low, are suppressed from white balance controlling data, so that data required for the white balance control can be correctly obtained without using small windows which a frame of picture is subdivided into. For this purpose, signals of predetermined window portions within one frame of picture are integrated by integration circuits, while weighting the signals by multiplication factor generating means based on brightness level, and then a white balance control is carried out by using an integrated value.

REFERENCES:
patent: 5099316 (1992-03-01), Ogawa
patent: 5223921 (1993-06-01), Haruki et al.

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