公开(公告)号：EP1536631A2

公开(公告)日：2005-06-01

申请号：EP04014505.4

申请日：2004-06-21

申请人： Hewlett-Packard Development Company, L.P.

发明人： Zeng, Huanzhao ,  Humet, Jacint ,  Lammens, Johan

IPC分类号： H04N1/60

CPC分类号： H04N1/6033 ,  H04N1/4078 ,  H04N1/608

摘要： A number of sets of color values for an imaging system to output a corresponding number of neutral gray outputs at different lightness levels, is computed by interpolation, based at least in part on received or taken measurements of a number of near-neutral patches for the different lightness levels printed by the imaging system using a number of sets of color values of the imaging system's color space. The color values of the imaging system's color space are derived based on a number of sets of color values of a profile connection space (PCS) in accordance with a print table of a color profile of the imaging system mapping color value sets from the PCS to color value sets in the imaging system's color space. The various sets of defining color values define the near-neutral patches in the PCS.

摘要翻译： 至少部分地基于接收到的或获得的用于所述多个中性灰度输出的中性灰度输出的多个中性灰度输出的数量，通过内插计算用于成像系统以不同亮度级输出对应数量的中性灰度输出的若干组颜色值。 由成像系统使用成像系统的色彩空间的多组色彩值来打印不同的明度等级。 成像系统的颜色空间的颜色值根据成像系统的颜色配置文件的打印表格基于配置文件连接空间（PCS）的颜色值的数量来导出，所述颜色配置文件映射来自PCS的颜色值集合到 色彩值设置在成像系统的色彩空间中。 各组定义颜色值定义了PCS中的近中性色块。

公开(公告)号：EP1465408A3

公开(公告)日：2006-02-22

申请号：EP03022939.7

申请日：2003-10-09

申请人： Hewlett-Packard Development Company, L.P.

发明人： Zeng, Huanzhao ,  Lammens, Johan ,  Nielsen, Mary ,  Jodra, Rodolfo

IPC分类号： H04N1/60

CPC分类号： H04N1/6022 ,  H04N1/603

摘要： A method and apparatus is used for preserving a black channel when a reference color space without a black channel is used to convert between a source black channel color space and a destination black channel color space (504). In one embodiment, the preservation and conversion system receives an image represented in a black channel color space and converts it to a reference color space, correlates at least one channel from the reference color space with a black output level that identifies a look-up table (LUT) for color values and a weight for interpolating the color values in the LUT for a destination device (510), interpolates between color values in at least two LUTs using the weight (514), and converts the image in the reference color space to the destination the black channel color space using the black output level and interpolated color values in the LUT (520).

公开(公告)号：EP1465408A2

公开(公告)日：2004-10-06

申请号：EP03022939.7

申请日：2003-10-09

申请人： Hewlett-Packard Development Company, L.P.

发明人： Zeng, Huanzhao ,  Lammens, Johan ,  Nielsen, Mary ,  Jodra, Rodolfo

IPC分类号： H04N1/60

CPC分类号： H04N1/6022 ,  H04N1/603

摘要： A method and apparatus is used for preserving a black channel when a reference color space without a black channel is used to convert between a source black channel color space and a destination black channel color space (504). In one embodiment, the preservation and conversion system receives an image represented in a black channel color space and converts it to a reference color space, correlates at least one channel from the reference color space with a black output level that identifies a look-up table (LUT) for color values and a weight for interpolating the color values in the LUT for a destination device (510), interpolates between color values in at least two LUTs using the weight (514), and converts the image in the reference color space to the destination the black channel color space using the black output level and interpolated color values in the LUT (520).

摘要翻译： 当使用没有黑色通道的参考色彩空间在源黑色通道颜色空间和目的地黑色通道颜色空间之间进行转换时，方法和装置用于保存黑色通道（504）。 在一个实施例中，保存和转换系统接收以黑色通道颜色空间表示的图像并将其转换为参考颜色空间，将至少一个来自参考颜色空间的通道与识别查找表的黑色输出水平相关联 （LUT），以及用于内插用于目的地设备（LUT）的颜色值的权重，使用权重（514）在至少两个LUT中的颜色值之间进行内插，并将参考颜色空间中的图像 在目的地中使用黑色输出电平的黑色通道颜色空间和LUT（520）中的内插颜色值。

公开(公告)号：EP1912423A1

公开(公告)日：2008-04-16

申请号：EP06122100.8

申请日：2006-10-11

申请人： Hewlett-Packard Development Company, L.P.

发明人： Encrenaz, Michel ,  Lammens, Johan ,  Morovic, Jan

IPC分类号： H04N1/405 ,  H04N1/52 ,  H04N1/54

CPC分类号： H04N1/4052 ,  H04N1/52 ,  H04N1/54

摘要： A method is provided of reproducing continuous tone pixel colors of a color image having many pixels based on Kueppers' device states, wherein the Kueppers' device states of a printing device are the printed pixel colors that are allowed based on Kueppers' color separation and halftoning. The method includes selecting a Kueppers' device state in the proximity of a continuous tone pixel color to be reproduced from the printing device's set of Kueppers' device states, and printing the Kueppers' device state. An error is diffused between the continuous pixel color and the selected Kueppers' device state to one or more pixels in the neighborhood.

摘要翻译： 提供了一种基于Kueppers设备状态再现具有许多像素的彩色图像的连续色调像素颜色的方法，其中打印设备的Kueppers设备状态是基于Kueppers颜色分离和半色调允许的打印像素颜色 。 该方法包括从打印设备的Kueppers设备状态集合中选择要再现的连续色调像素颜色附近的Kueppers设备状态，并打印Kueppers设备状态。 连续像素颜色和所选的Kueppers设备状态之间的错误在附近的一个或多个像素上扩散。

公开(公告)号：EP1536631A3

公开(公告)日：2005-11-30

申请号：EP04014505.4

申请日：2004-06-21

申请人： Hewlett-Packard Development Company, L.P.

发明人： Zeng, Huanzhao ,  Humet, Jacint ,  Lammens, Johan

IPC分类号： H04N1/60

CPC分类号： H04N1/6033 ,  H04N1/4078 ,  H04N1/608

摘要： A number of sets of color values for an imaging system to output a corresponding number of neutral gray outputs at different lightness levels, is computed by interpolation, based at least in part on received or taken measurements of a number of near-neutral patches for the different lightness levels printed by the imaging system using a number of sets of color values of the imaging system's color space. The color values of the imaging system's color space are derived based on a number of sets of color values of a profile connection space (PCS) in accordance with a print table of a color profile of the imaging system mapping color value sets from the PCS to color value sets in the imaging system's color space. The various sets of defining color values define the near-neutral patches in the PCS.