Automatic white balance control system, automatic white...

Details Automatic white balance control system, automatic white... Automatic white balance control system, automatic white...

2011-04-19

2011-04-19

Jerabek, Kelly L (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S229100

Reexamination Certificate

active

07929025

ABSTRACT:
The present invention discloses an automatic white balance control system, an automatic white balance module, and a method thereof. The automatic white balance (AWB) control system calculates a distance value from a coordinate related to the image to a reference point in a color space coordinate system for each image. If the median or mean of the distance values is greater than a threshold value, an automatic white balance operation will be performed. The system dynamically adjusts the threshold value to prevent a blinking caused by the automatic white balance. The white balance module selects an image block of a higher image sharpness to perform a gain adjustment to prevent a monochromatic block from misjudging a white balance gain.

REFERENCES:
patent: 7304668 (2007-12-01), Ichikawa et al.
patent: 7643068 (2010-01-01), Hyodo
patent: 7791649 (2010-09-01), Kim et al.
patent: 2004/0085458 (2004-05-01), Yanof et al.
patent: 2004/0212691 (2004-10-01), Sato
patent: 2006/0262197 (2006-11-01), Uezono

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