发明授权
US06411331B1 Automatic white balance detection and correction of an image captured in a digital camera
失效
在数码相机中拍摄的图像的自动白平衡检测和校正
- 专利标题: Automatic white balance detection and correction of an image captured in a digital camera
- 专利标题(中): 在数码相机中拍摄的图像的自动白平衡检测和校正
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申请号: US08808918申请日: 1997-02-28
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公开(公告)号: US06411331B1公开(公告)日: 2002-06-25
- 发明人: Cindy Y. Sansom-Wai , Kirt A. Winter , Paul M. Hubel
- 申请人: Cindy Y. Sansom-Wai , Kirt A. Winter , Paul M. Hubel
- 主分类号: H04N973
- IPC分类号: H04N973
摘要:
A digital camera includes a lens and a plurality of color filters adjacent the lens. An array of detectors such as CCDs each receive, through the lens and a corresponding one of the color filters, light reflected from a scene. Each detector outputs a signal representative of an amount of light it receives. Circuitry is connected to the array for processing the signals from the detectors and generating a set of digital image data including a chromaticity value and a luminance value of a plurality of pixels representing an uncorrected image of the scene. A control circuit maps a two-dimensional representation of the digital image data into a two-dimensional representation of a set of reference image data and adjusts selected ones of the values of the set of digital image data in accordance with a predetermined transform to white balance the uncorrected image of the scene and produce a modified set of digital image data representing a corrected image of the scene.