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    • 4. 发明申请
    • FORCE K PROCESSING IN A CMYK COLOR CONVERSION
    • 强制加工在CMYK颜色转换
    • US20130016370A1
    • 2013-01-17
    • US13182628
    • 2011-07-14
    • Vladimir V. ShestakLarry M. ErnstHong LiJason C. Walp
    • Vladimir V. ShestakLarry M. ErnstHong LiJason C. Walp
    • H04N1/60
    • H04N1/6025
    • Force K processing is presented to replace gray color values of input data with only levels of black ink/toner when color management is not specified in the print job. A system converts input data of a print job to a CMYK color space of a printer by processing a lookup table of color values for the color space of the input data based on a detected color space of the input data to identify gray color values of the lookup table. The system also determines that these gray color values produce an output in the CMYK color space of the printer that includes one or more of cyan, magenta, and yellow color components. The system replaces the gray color values with black color values and corresponds the black color values of the lookup table with gray color values of the input data for conversion of the input data.
    • 当在打印作业中未指定颜色管理时,提供强制K处理以仅使用黑色墨水/墨粉的水平来替换输入数据的灰度值。 系统通过根据检测到的输入数据的颜色空间处理输入数据的颜色空间的颜色值的查找表,来将打印作业的输入数据转换成打印机的CMYK颜色空间,以识别输入数据的灰色值 查找表。 该系统还确定这些灰色值在打印机的CMYK色彩空间中产生包括青色,品红色和黄色组分中的一种或多种的输出。 系统用黑色颜色值替换灰色值,并将输入数据转换为输入数据的灰色值对应于查找表的黑色值。
    • 5. 发明申请
    • SYSTEMS AND METHODS OF COLOR CONVERSION WITH GRAY VALUES
    • 颜色变换与灰度值的系统和方法
    • US20110075163A1
    • 2011-03-31
    • US12569631
    • 2009-09-29
    • Yue QiaoLarry M. ErnstVladimir V. Shestak
    • Yue QiaoLarry M. ErnstVladimir V. Shestak
    • H04N1/60
    • H04N1/58H04N1/6025
    • Methods and systems herein provide for the color conversion of image data with various levels of gray values, such as text. Such color conversion includes generating a CMYK conversion model by defining a gray region in the perceptual color space of the image data to convert the gray values of the gray region to a range of K values during CMYK color conversion of the image data and segmenting chroma values in a color lookup table that maps perceptual color values to CMYK color values. Lightness values in the color lookup table are adjusted using a perceptual model (e.g., a Heimholtz-Kohlrausch Effect model) based on the segmented chroma values to substantially maintain a lightness relationship between the gray values of the image data and the remaining color values of the image data. The image data is the converted to a CMYK color space using the generated CMYK conversion model.
    • 本文中的方法和系统提供了具有各种灰度值(诸如文本)的图像数据的颜色转换。 这种颜色转换包括通过在图像数据的感知色彩空间中定义灰色区域来生成CMYK转换模型,以在图像数据的CMYK颜色转换期间将灰色区域的灰度值转换为K值的范围,并且对色度值进行分割 在颜色查找表中,将感知颜色值映射到CMYK颜色值。 基于分段色度值,使用感知模型(例如,Heimholtz-Kohlrausch效应模型)来调整颜色查找表中的亮度值,以基本上保持图像数据的灰度值与剩余颜色值之间的亮度关系 图像数据。 使用生成的CMYK转换模型将图像数据转换为CMYK色彩空间。
    • 6. 发明授权
    • Systems and methods of color conversion with gray values
    • 使用灰度值进行颜色转换的系统和方法
    • US08587828B2
    • 2013-11-19
    • US12569631
    • 2009-09-29
    • Yue QiaoLarry M. ErnstVladimir V. Shestak
    • Yue QiaoLarry M. ErnstVladimir V. Shestak
    • G06F15/00G03F3/08G09G3/36G09G5/02
    • H04N1/58H04N1/6025
    • Methods and systems herein provide for the color conversion of image data with various levels of gray values, such as text. Such color conversion includes generating a CMYK conversion model by defining a gray region in the perceptual color space of the image data to convert the gray values of the gray region to a range of K values during CMYK color conversion of the image data and segmenting chroma values in a color lookup table that maps perceptual color values to CMYK color values. Lightness values in the color lookup table are adjusted using a perceptual model (e.g., a Heimholtz-Kohlrausch Effect model) based on the segmented chroma values to substantially maintain a lightness relationship between the gray values of the image data and the remaining color values of the image data. The image data is the converted to a CMYK color space using the generated CMYK conversion model.
    • 本文中的方法和系统提供了具有各种灰度值(诸如文本)的图像数据的颜色转换。 这种颜色转换包括通过在图像数据的感知色彩空间中定义灰色区域来生成CMYK转换模型,以在图像数据的CMYK颜色转换期间将灰色区域的灰度值转换为K值的范围,并且对色度值进行分割 在颜色查找表中,将感知颜色值映射到CMYK颜色值。 基于分段色度值,使用感知模型(例如,Heimholtz-Kohlrausch效应模型)来调整颜色查找表中的亮度值,以基本上保持图像数据的灰度值与剩余颜色值之间的亮度关系 图像数据。 使用生成的CMYK转换模型将图像数据转换为CMYK色彩空间。
    • 7. 发明申请
    • CMYK COLOR CONVERSION USING ITERATIVE COORDINATE REVISION
    • CMYK颜色转换使用迭代坐标修改
    • US20120218569A1
    • 2012-08-30
    • US13036221
    • 2011-02-28
    • Vladimir V. ShestakHong LiLarry M. ErnstYue Qiao
    • Vladimir V. ShestakHong LiLarry M. ErnstYue Qiao
    • H04N1/60
    • H04N1/6022
    • Systems and methods for color conversion from one CMYK color space to another CMYK color space. The system receives a color defined by a first coordinate in the first CMYK color space. The system converts the color to a second coordinate for the second CMYK color space, and determines a location in a perceptual color space for each of the first coordinate and the second coordinate. The system further identifies a distance between the locations in the perceptual color space, and reduces the distance in the perceptual color space between the two locations by iteratively revising the second coordinate in the second CMYK color space while holding the black level of the second coordinate constant.
    • 从一个CMYK颜色空间到另一个CMYK颜色空间的颜色转换的系统和方法。 系统接收由第一个CMYK颜色空间中的第一个坐标定义的颜色。 系统将颜色转换为第二CMYK颜色空间的第二坐标,并且确定第一坐标和第二坐标中的每一个的感知颜色空间中的位置。 该系统进一步识别感知色彩空间中的位置之间的距离,并且通过在保持第二坐标常数的黑色电平的同时迭代地修改第二CMYK颜色空间中的第二坐标来减小两个位置之间感知色彩空间中的距离 。
    • 8. 发明授权
    • Force K processing in a CMYK color conversion
    • 强制K处理CMYK颜色转换
    • US08767258B2
    • 2014-07-01
    • US13182628
    • 2011-07-14
    • Vladimir V. ShestakLarry M. ErnstHong LiJason C. Walp
    • Vladimir V. ShestakLarry M. ErnstHong LiJason C. Walp
    • H04N1/60
    • H04N1/6025
    • Force K processing is presented to replace gray color values of input data with only levels of black ink/toner when color management is not specified in the print job. A system converts input data of a print job to a CMYK color space of a printer by processing a lookup table of color values for the color space of the input data based on a detected color space of the input data to identify gray color values of the lookup table. The system also determines that these gray color values produce an output in the CMYK color space of the printer that includes one or more of cyan, magenta, and yellow color components. The system replaces the gray color values with black color values and corresponds the black color values of the lookup table with gray color values of the input data for conversion of the input data.
    • 当在打印作业中未指定颜色管理时,提供强制K处理以仅使用黑色墨水/墨粉的水平来替换输入数据的灰度值。 系统通过根据检测到的输入数据的颜色空间处理输入数据的颜色空间的颜色值的查找表,来将打印作业的输入数据转换成打印机的CMYK颜色空间,以识别输入数据的灰色值 查找表。 该系统还确定这些灰色值在打印机的CMYK色彩空间中产生包括青色,品红色和黄色组分中的一种或多种的输出。 系统用黑色颜色值替换灰色值,并将输入数据转换为输入数据的灰色值对应于查找表的黑色值。
    • 9. 发明授权
    • CMYK color conversion using iterative coordinate revision
    • CMYK颜色转换采用迭代坐标修正
    • US08605329B2
    • 2013-12-10
    • US13036221
    • 2011-02-28
    • Vladimir V. ShestakHong LiLarry M. ErnstYue Qiao
    • Vladimir V. ShestakHong LiLarry M. ErnstYue Qiao
    • G06K1/00G06F15/00G03F3/08
    • H04N1/6022
    • Systems and methods for color conversion from one CMYK color space to another CMYK color space. The system receives a color defined by a first coordinate in the first CMYK color space. The system converts the color to a second coordinate for the second CMYK color space, and determines a location in a perceptual color space for each of the first coordinate and the second coordinate. The system further identifies a distance between the locations in the perceptual color space, and reduces the distance in the perceptual color space between the two locations by iteratively revising the second coordinate in the second CMYK color space while holding the black level of the second coordinate constant.
    • 从一个CMYK颜色空间到另一个CMYK颜色空间的颜色转换的系统和方法。 系统接收由第一个CMYK颜色空间中的第一个坐标定义的颜色。 系统将颜色转换为第二CMYK颜色空间的第二坐标,并且确定第一坐标和第二坐标中的每一个的感知颜色空间中的位置。 该系统进一步识别感知色彩空间中的位置之间的距离,并且通过在保持第二坐标常数的黑色电平的同时迭代地修改第二CMYK颜色空间中的第二坐标来减小两个位置之间感知色彩空间中的距离 。