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    • 49. 发明授权
    • Image correction circuit, image correction method and image display
    • 图像校正电路,图像校正方法和图像显示
    • US07990474B2
    • 2011-08-02
    • US11746223
    • 2007-05-09
    • Shigeru HaradaKazuhito KobayashiYoshifumi DochiTomonori Tsutsumi
    • Shigeru HaradaKazuhito KobayashiYoshifumi DochiTomonori Tsutsumi
    • H04N5/21H04N9/64
    • H04N9/68H04N9/77
    • An image correction circuit capable of easily achieving adaptive color correction on the basis of a luminance correction amount is provided. An image correction circuit includes: a luminance correction section for performing luminance correction on input image data; and a color correction section for performing adaptive color correction on input image data on the basis of the following formula (1): Cout∝Cin×[1+M×(ΔY/L)]  (1) where Cout represents a chrominance signal after color correction, Cin represents a chrominance signal before color correction, M represents an adaptive color correction magnitude which is a fixed positive value, ΔY represents the total amount of luminance correction by the luminance correction section, L represents a fixed positive value satisfying L
    • 提供了能够基于亮度校正量容易地实现自适应色彩校正的图像校正电路。 一种图像校正电路包括:用于对输入图像数据执行亮度校正的亮度校正部分; 以及颜色校正部分,用于基于以下公式(1)对输入图像数据进行自适应颜色校正:CoutαCin×[1 + M×(&Dgr; Y / L)](1)其中Cout表示色度 颜色校正后的信号,Cin表示色彩校正前的色度信号,M表示作为固定正值的自适应色彩校正量,&Dgr; Y表示亮度校正部的亮度校正的总量,L表示固定的正值 满足L <(Ymax / 2),Ymax表示输入图像数据的最大亮度。
    • 50. 发明申请
    • IMAGE CORRECTION CIRCUIT, IMAGE CORRECTION METHOD AND IMAGE DISPLAY
    • 图像校正电路,图像校正方法和图像显示
    • US20070286533A1
    • 2007-12-13
    • US11743366
    • 2007-05-02
    • Shigeru Harada
    • Shigeru Harada
    • G06K9/03
    • H04N5/20G09G5/10G09G2320/066G09G2320/0673G09G2360/16
    • An image correction method includes the steps of: acquiring a black-side intermediate luminance distribution as a luminance distribution in a region between a lowest luminance in a given intermediate luminance region in a luminance distribution of input image data in an image frame and a reference luminance provided in the center of the intermediate luminance region; determining a low-luminance-region input/output characteristic curve on the basis of the acquired black-side intermediate luminance distribution, the low-luminance-region input/output characteristic curve passing through a reference point, in the reference input/output characteristic line, determined in accordance with the reference luminance and through a minimum luminance point of the reference input/output characteristic line; and executing image correction on input image data having a luminance which is lower than the reference luminance on the basis of the determined low-luminance-region input/output characteristic curve.
    • 图像校正方法包括以下步骤:在图像帧中的输入图像数据的亮度分布中的给定中间亮度区域中的最低亮度与参考亮度之间的区域中获取作为亮度分布的黑色侧中间亮度分布 设置在中间亮度区域的中心; 基于获取的黑侧中间亮度分布,通过参考点的低亮度区域输入/输出特性曲线,在参考输入/输出特性线中,确定低亮度区域输入/输出特性曲线 根据参考亮度和参考输入/输出特性线的最小亮度点确定; 以及基于所确定的低亮度区域输入/输出特性曲线对具有低于参考亮度的亮度的输入图像数据执行图像校正。