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    • 1. 发明授权
    • Method and apparatus for mapping colors into a color gamut
    • 将颜色映射到色域的方法和装置
    • US06778185B1
    • 2004-08-17
    • US10071975
    • 2002-02-06
    • Nathan McPherson Moroney
    • Nathan McPherson Moroney
    • G09G502
    • H04N1/6058
    • Some embodiments of the invention provide a method for mapping a source color into a color gamut without changing the value of its hue attribute. In some embodiments, a source color is initially represented by a first set of color coordinates that are defined with respect to a first coordinate system. The first set of color coordinates is then transformed to a second set of color coordinates, defined in a second coordinate system. If the second set of color coordinates is outside of a selected color gamut, the value of a first color coordinate of the second set of color coordinates is reduced until the second set of color coordinates is in-gamut. The first coordinate axis of the second coordinate system is either an “R” axis or a coordinate axis that is independent of hue, “H”, and not identical to chroma, C*. The in-gamut set of color coordinates comprises a gamut-mapped color corresponding to the source color.
    • 本发明的一些实施例提供了一种用于将源颜色映射到色域而不改变其色调属性的值的方法。 在一些实施例中,源颜色最初由相对于第一坐标系定义的第一组颜色坐标来表示。 然后将第一组颜色坐标变换为在第二坐标系中定义的第二组颜色坐标。 如果第二组色坐标在所选择的色域之外,则减少第二组色坐标的第一色坐标的值,直到第二组色坐标为色域内。 第二坐标系的第一坐标轴是“R”轴或与色调“H”无关的坐标轴,与色度C *不相同。 色域内的色域集合包括对应于源颜色的色域映射颜色。