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    • 92. 发明授权
    • Color processing apparatus and its method
    • 彩色处理装置及其方法
    • US07965427B2
    • 2011-06-21
    • US11470375
    • 2006-09-06
    • Takahiro SuzukiOsamu Yamada
    • Takahiro SuzukiOsamu Yamada
    • G06F15/00G03F3/08H04N9/73
    • H04N1/6058H04N1/6086
    • When a whole input gamut is mapped into an output gamut, even a gamut range which is not used in practice is mapped into the output gamut. This causes a saturation drop or tone loss. In order to solve this problem, image data obtained by the first device is input and an obtaining condition of the input image data is obtained. On the basis of the obtaining condition, the first gamut information of the input image data is obtained from a table showing the relationship between the output gamut of the first device and the obtaining condition. On the basis of the first gamut information and the second gamut information which indicates the gamut of the second device, the input image data is mapped into the gamut indicated by the second gamut information.
    • 当整个输入色域被映射到输出色域时,即使在实际中未使用的色域范围也被映射到输出色域。 这会导致饱和度下降或音量损失。 为了解决这个问题,输入由第一装置获得的图像数据,并且获得输入图像数据的获得条件。 基于获得条件,从表示第一装置的输出色域与获得条件之间的关系的表中获得输入图像数据的第一色域信息。 基于指示第二设备的色域的第一色域信息和第二色域信息,将输入图像数据映射到由第二色域信息指示的色域中。
    • 93. 发明授权
    • Color evaluation apparatus and method
    • 颜色评估装置及方法
    • US07667845B2
    • 2010-02-23
    • US11167228
    • 2005-06-28
    • Kosei TakahashiOsamu Yamada
    • Kosei TakahashiOsamu Yamada
    • G01N21/25
    • G01J3/46G01J3/462G01J3/463G01J3/465
    • A spectral distribution error evaluation apparatus is used to evaluate precision of color matching between evaluation and target colors. A first weighting function generator generates a first weighting function on the basis of color matching functions, wavelength characteristics which are independent of a light source of the target color, and visual characteristics which depend on wavelengths. A second weighting function generator generates a second weighting function on the basis of light source information of selected light sources. A difference calculator calculates error values between the evaluation and target colors for respective frequencies. An evaluation value calculator applies the first and second weighting functions to the error values, and calculates the sum total of the error values as an evaluation value. In this way, a precision evaluation value which has high correlation with actual color appearance and is used to improve the color matching precision can be calculated independently of a change in condition such as a light source or the like.
    • 光谱分布误差评估装置用于评估评估和目标颜色之间的颜色匹配的精度。 第一加权函数发生器基于颜色匹配函数产生第一加权函数,独立于目标颜色的光源的波长特性以及取决于波长的视觉特性。 第二加权函数发生器基于所选择的光源的光源信息生成第二加权函数。 差分计算器计算各个频率的评估和目标色彩之间的误差值。 评估值计算器将第一和第二加权函数应用于误差值,并将误差值的总和计算为评估值。 以这种方式,可以独立于诸如光源等条件的变化来计算与实际颜色外观高度相关并用于提高颜色匹配精度的精度评估值。