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1. 发明申请

WO2005109856A3 GAMUT MAPPING WITH PRIMARY COLOR ROTATION 审中-公开
公开(公告)号：WO2005109856A3
公开(公告)日：2005-11-17
申请号：PCT/US2005/015674
申请日：2005-05-06
申请人： CANON KABUSHIKI KAISHA , HENLEY, Sharon, A. , SLOAN, Rocklin, J.
发明人： HENLEY, Sharon, A. , SLOAN, Rocklin, J.
IPC分类号： G06F15/00
摘要： Gamut-mapping from a source device to a destination device is performed in a perceptually linear color space such as CIECAM02 by separating a source image into primary color components and processing each primary component separately by mapping a source primary hue leaf with a destination primary hue leaf. The mapped primary components are then summed and a resultant destination image is obtained. Alternatively, hue rotation is performed by determining a relative position of an input color between the nearest primary and the nearest secondary color in a source hue wheel. The determined relative position in the source hue wheel is used to find a corresponding location in a destination hue wheel so that the hue angle for obtaining the destination hue leaf can be determined. In both processes, the source and destination hue leafs are mapped using a cusp-to cusp mapping with a shear mapping process being used to pull in the remaining colors. Finally, results of the mapping process are converted from device-independent color appearance space values to tristimulus values, and from tristimulus values to a color space of the destination device.

2. 发明申请

WO2005022328A2 GAMUT MAPPING BETWEEN MULTIPLE BOUNDARY REGIONS 审中-公开
标题翻译：多边界区域之间的GAMUT映射
公开(公告)号：WO2005022328A2
公开(公告)日：2005-03-10
申请号：PCT/US2004/027804
申请日：2004-08-27
申请人： CANON KABUSHIKI KAISHA , NEWMAN, Todd, D. , HAIKIN, John, S. , HENLEY, Sharon, A.
发明人： NEWMAN, Todd, D. , HAIKIN, John, S. , HENLEY, Sharon, A.
IPC分类号： G06F
CPC分类号： H04N1/6058
摘要： Mapping color image data from a source color gamut to a destination color gamut, wherein the mapping includes identifying source color boundary regions in the source color gamut based on descriptor data provided in a source color descriptor data structure, and determining a position of each identified source color boundary region, identifying destination color boundary regions in the destination color gamut based on descriptor data provided in a destination color descriptor data structure, and determining a position of each identified destination color boundary region, and mapping the color image data from the identified source color boundary regions of the identified destination color boundary regions based on a correspondence between the determined positions of the identified source color boundary regions and the determined positions of the identified destination color boundary regions.
摘要翻译：将颜色图像数据从源色域映射到目标色域，其中所述映射包括基于源颜色描述符数据结构中提供的描述符数据来识别源色域中的源颜色边界区域，以及确定每个识别源的位置颜色边界区域，基于目的色彩描述符数据结构中提供的描述符数据识别目的色域中的目的色边界区域，以及确定每个识别的目标色边界区域的位置，以及从所识别的源颜色映射彩色图像数据基于所确定的源色彩边界区域的确定位置与所确定的目标色彩边界区域的确定位置之间的对应关系，识别的目标色彩边界区域的边界区域。

3. 发明申请

WO2005022442A2 COLOR DESCRIPTOR DATA STRUCTURE 审中-公开
标题翻译：颜色描述符数据结构
公开(公告)号：WO2005022442A2
公开(公告)日：2005-03-10
申请号：PCT/US2004/027803
申请日：2004-08-27
申请人： CANON KABUSHIKI KAISHA , NEWMAN, Todd, D. , HENLEY, Sharon, A. , HAIKIN, John, S.
发明人： NEWMAN, Todd, D. , HENLEY, Sharon, A. , HAIKIN, John, S.
IPC分类号： G06K
CPC分类号： H04N1/4078 , H04N1/6033
摘要： A color descriptor data structure corresponding to a color device, the color descriptor data structure including a reference color data set corresponding to a reference boundary descriptor representing reference colors of the color device based on measured colors from a reference color target, a plausible color data set corresponding to a plausible boundary descriptor representing plausible colors of the color device which are observable, which encompass at least the reference colors of the reference boundary descriptor, and which include a whitest-white color and a blackest-black color, and a neutral color data set corresponding to neutral colors of the color device, the neutral colors extending in range from the whitest-white color to the blackest-black color.
摘要翻译：对应于彩色设备的颜色描述符数据结构，所述颜色描述符数据结构包括对应于基于来自参考颜色目标的测量颜色的表示所述颜色设备的参考颜色的参考边界描述符的参考颜色数据集合，合理的颜色数据集对应于表示可观察到的颜色设备的合理颜色的合理边界描述符，其至少包含参考边界描述符的参考颜色，并且包括最白白色和最黑黑色，以及中性色数据对应于彩色设备的中性色，中性色从范围从最白白色到最黑黑色。

4. 发明申请

WO2006036424A2 COLOR APPEARANCE SPACE TO CMYK MAPPING USING RELATIVE PURITY 审中-公开
标题翻译：使用相对纯度的彩色外观空间到CMYK映射
公开(公告)号：WO2006036424A2
公开(公告)日：2006-04-06
申请号：PCT/US2005/030611
申请日：2005-08-26
申请人： CANON KABUSHIKI KAISHA , HAIKIN, John, S. , NEWMAN, Todd, D. , HENLEY, Sharon, A.
发明人： HAIKIN, John, S. , NEWMAN, Todd, D. , HENLEY, Sharon, A.
IPC分类号： H04N1/60
CPC分类号： H04N1/6025
摘要： The present invention relates to a color management method for the conversion of internal color appearance space color values to CMYK device values, by interpolating CMY values from a plurality of CMY to color appearance space lookup tables, wherein each CMY table is associated with a specific value of K. A target internal color value is received and the relative purity of that color is calculated in the CMY space. Next, a black generation value is calculated using the relative purity of the target color. Finally, one of the plurality of CMY lookup tables is selected based on the black generation value, and a CMYK value is provided based on an interpolation from the selected lookup table. In this way, the present invention is able to control the output K value in a color appearance space to CMYK conversion. Accordingly, colors across a wide relative purity range, including natural images, can be reproduced with better accuracy and higher quality.
摘要翻译：本发明涉及一种通过将CMY值从多个CMY内插到颜色外观空间查找表来将内部颜色外观空间颜色值转换为CMYK设备值的颜色管理方法，其中每个CMY表与特定值相关联的K.接收目标内部颜色值，并且在CMY空间中计算该颜色的相对纯度。接下来，使用目标颜色的相对纯度计算黑色代数值。最后，基于黑色生成值选择多个CMY查找表中的一个，并且基于来自所选择的查找表的插值提供CMYK值。以这种方式，本发明能够将颜色外观空间中的输出K值控制为CMYK转换。因此，可以以更高的精度和更高的质量再现包括自然图像的宽相对纯度范围内的颜色。

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