Method and apparatus for improving automatic white balance with scene information
AssigneeTexas Instruments Incorporated
InventorsBuyue Zhang, Rajesh Narasimha
Life of this patent
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Abstract
A method and apparatus for automatic white balancing of an image. The method includes retrieving scene analysis of the image, determining at least one of the type of the scene and a scene content map utilizing the scene analysis of the image, performing scene adaptive white balance, if overall scene category type is used, perform white balance by applying global R, G, B gains optimized for the global scene type, and if scene segmentation map is used, perform locally adaptive white balance by applying an R, G, B gain map optimized for each scene content.
Claims17
A method for a digital signal processor for automatic white balancing of an image, comprising:
- retrieving scene analysis of the image;
- determining at least one of the type of the scene and a scene content map utilizing the scene analysis of the image;
- performing scene adaptive white balance;
- if overall scene category type is used, perform white balance by applying global R, G, B gains optimized for the global scene type;
- and
- if scene segmentation map is used, perform locally adaptive white balance by applying an R, G, B gain map optimized for each scene content.
An apparatus for automatic white balancing of an image, comprising:
- means for retrieving scene content information of the image;
- means for determining the scene type utilizing the scene analysis of the image;
- means for performing scene adaptive white balance;
- If an overall scene category type is used, applying global R, G, B gains optimized for this scene category;
- and
- if scene content map is used, applying locally adaptive white balance correction with a R, G, B gain map optimized for each scene content region.
A computer readable medium comprising software that, when executed by a processor, causes the processor to perform a method for automatic white balancing of an image, the method comprising:
- retrieving scene information of the image;
- determining the scene type utilizing the scene analysis of the image;
- performing scene adaptive white balance;
- If an overall scene category type is used, applying global R, G, B gains optimized for this scene category;
- and
- if scene content map is used, applying locally adaptive white balance correction with a R, G, B gain map optimized for each scene content region
Dependencies are inferred from the claim text.