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    • 99. 发明授权
    • Method and apparatus for automatic white balance adjustment based upon light source type
    • 基于光源类型自动白平衡调整的方法和装置
    • US06952225B1
    • 2005-10-04
    • US09496588
    • 2000-02-02
    • Manabu HyodoMasahiro KonishiChiaki Ichikawa
    • Manabu HyodoMasahiro KonishiChiaki Ichikawa
    • H04N9/04H04N9/73
    • H04N9/735
    • An image-capturing EV is obtained when a shutter button is half pressed, and whether to flash an electronic flash for a subject of low luminance is determined according to the image-capturing EV. If it is determined that the electronic flash should be flashed for the subject of low luminance, a white balance is adjusted according to an electronic flash light. If it is determined that the electronic flash should not be flashed for the subject of low luminance, color information relating to a plurality of areas divided from an entire image plane is acquired, and the number of areas belonging to a shade determination frame, which indicates a color distribution range corresponding to the shade, is found according to the acquired color information. Then, whether a type of the light source is the shade or the daylight is determined according to the obtained image-capturing EV and the number of areas belonging to the shade determination frame. The white balance is adjusted according to the determined type of the light source.
    • 当按下快门按钮时获得图像拍摄EV,并且根据图像拍摄EV确定是否为低亮度的被摄体拍摄电子闪光。 如果确定电子闪光灯应该以低亮度的对象闪光,则根据电子闪光灯调节白平衡。 如果确定对于低亮度的对象不应该闪烁电子闪光,则获取与从整个图像平面划分的多个区域有关的颜色信息,以及指示颜色确定框的区域的数量,其指示 根据获取的颜色信息找到与色调相对应的颜色分布范围。 然后,根据获得的图像拍摄EV和属于色度确定帧的区域的数量,确定光源的类型是阴影还是日光。 根据确定的光源类型调整白平衡。