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    • 5. 发明授权
    • Color calibration of displays
    • 显示器的颜色校准
    • US06690383B1
    • 2004-02-10
    • US09490545
    • 2000-01-24
    • Gordon Wesley BraudawayAlbert Nessim CazesJames Edward ChristensenMichael James CordesDonald Michael DeCainShui-Chih Alan LienFrederick Cole MintzerSteven Lorenz Wright
    • Gordon Wesley BraudawayAlbert Nessim CazesJames Edward ChristensenMichael James CordesDonald Michael DeCainShui-Chih Alan LienFrederick Cole MintzerSteven Lorenz Wright
    • G09G502
    • G09G5/006G09G5/04G09G2320/0693H04N17/02H04N17/04
    • The present invention provides methods and apparatus for the color calibration of displays. These methods are particularly useful for displays having properties different than those associated with cathode ray tubes (CRT). Some displays, for example liquid crystal displays (LCD), have a high luminance black, the chromas of their primaries are not independent of their luminance levels, the intensities of their primaries are not strictly monotonically increasing with respect to their RGB levels, the color additivity of their subpixels is affected by crosstalk or leakage and their color measurements are dependent on the view angle of the observer. Therefore, the usage of CRT methods is deficient for such displays. The methods and apparatus of the present invention overcome several deficiencies generally found in non-CRT display devices by employing techniques associated with the use of restricted ranges for the primaries, subtracting the color black from all color measurements, forming a modified display matrix and/or creating tables which correct errors due to the non-linearities or color leakages of these display devices. These enable images to be processed using algorithms of different complexity and precision.
    • 本发明提供了用于显示器的颜色校准的方法和装置。 这些方法对于具有与阴极射线管(CRT)相关的特性不同的性质的显示器特别有用。 一些显示器(例如液晶显示器(LCD))具有高亮度黑色,它们的原色的色度不依赖于它们的亮度级别,其基色的强度相对于它们的RGB等级不是严格单调增加,颜色 它们的子像素的加和性受串扰或泄漏的影响,并且它们的颜色测量取决于观察者的视角。 因此,CRT方法的使用对于这种显示器是不足的。 本发明的方法和装置克服了在非CRT显示装置中通常使用与使用限制范围的原色有关的技术的几个缺陷,从所有颜色测量中减去颜色黑色,形成修改后的显示矩阵和/或 创建由于这些显示设备的非线性或颜色泄漏而校正错误的表。 这些使得能够使用不同复杂度和精度的算法来处理图像。