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    • 153. 发明授权
    • Method for selecting a color transformation
    • 选择颜色变换的方法
    • US07742058B2
    • 2010-06-22
    • US11657317
    • 2007-01-24
    • Marc MahyPaul Delabastita
    • Marc MahyPaul Delabastita
    • G09G5/02
    • H04N1/6052H04N1/6011
    • An output color profile, such as an ICC output profile, contains a look-up table to separate the color of a pixel, for example a CIELAB color, into a set of colorant values, for example CMYK colorants. In practice, most CMYK images have been separated using one of a limited set of standardized output profiles. The problem to be solved is guessing which one of these standardized output profiles has been used to separate a specific image. For this purpose the CMYK values of the image are analyzed. The analysis involves calculating a distance in the CMYK space between the CMYK values of an image, and the CMYK values produced by different output profiles. A profile is selected based on these distances, for example by selecting the profile yielding the shortest distance. This profile is then used for converting the CMYK colorant values of the image into CIELAB color values.
    • 诸如ICC输出配置文件的输出颜色配置文件包含用于将像素的颜色(例如CIELAB颜色)分离成一组着色剂值的查找表,例如CMYK着色剂。 在实践中,大多数CMYK图像已经使用有限的一组标准输出曲线之一进行分离。 要解决的问题是猜测这些标准化输出配置文件中的哪一个已被用于分离特定图像。 为此,分析图像的CMYK值。 该分析涉及计算图像的CMYK值之间的CMYK空间中的距离和由不同的输出轮廓产生的CMYK值。 基于这些距离选择轮廓,例如通过选择产生最短距离的轮廓。 然后使用该配置文件将图像的CMYK着色剂值转换为CIELAB颜色值。
    • 154. 发明申请
    • IMAGE FORMING APPARATUS, PRINTING SUPPORT METHOD AND PRINTING SUPPORT PROGRAM
    • 图像形成装置,打印支持方法和打印支持程序
    • US20100149563A1
    • 2010-06-17
    • US12634091
    • 2009-12-09
    • Tomoko OTOMARU
    • Tomoko OTOMARU
    • H04N1/60
    • H04N1/6052
    • An image forming apparatus for printing image data of print subject after converting the image data to print image data dependent on an image forming device, the apparatus including a control section which converts the image data to first data in a color space independent from the image forming device by referring to a first conversion table, converts the print image data to second data in the color space by referring to a second conversion table, calculates a color difference specified by a difference between the first data and the second data, and causes a display section to display the calculated color difference.
    • 一种图像形成装置,用于在将图像数据转换成依赖于图像形成装置打印图像数据之后打印打印对象的图像数据,该装置包括控制部分,该控制部分将图像数据转换成独立于图像形成的颜色空间中的第一数据 通过参考第一转换表,通过参考第二转换表将打印图像数据转换成色空间中的第二数据,计算由第一数据和第二数据之间的差指定的色差,并且使显示器 部分显示计算出的色差。
    • 156. 发明授权
    • System for distributing and controlling color reproduction at multiple sites
    • US07715052B2
    • 2010-05-11
    • US11452546
    • 2006-06-14
    • Richard A. Holub
    • Richard A. Holub
    • H04N1/40
    • G06F3/1203G01J3/462G01J3/465G01J3/50G01J3/524G06F3/04897G06F3/1267H04N1/32523H04N1/32545H04N1/46H04N1/60H04N1/6052H04N1/6058H04N1/6066H04N17/02
    • The system provides for controlling color reproduction of input color image data representing one or more pages or page constituents in a network having nodes (or sites). Each one of the nodes comprises at least one rendering device. The system distributes the input color image data from one of the nodes to other nodes, and provides a data structure (virtual proof) in the network. This data structure has components shared by the nodes and other components present only at each node. Next, the system has means for providing color calibration data at each node characterizing output colors (colorants) of the rendering device of the node, and means for producing at each node, responsive to the color calibration data of the rendering device of the node, information for transforming the input color image data into output color image data at the rendering device of the node. The information is then stored in the data structure in different ones of the shared and other components. Means are provided in the system for transforming at each node the input color image data into output color image data for the rendering device of the node responsive to the information in the data structure. The rendering device of each node renders a color reproduction of the page constituents responsive to the output color image data, wherein colors displayed in the reproduction at the rendering device of each node appear substantially the same within the output colors attainable by the rendering devices. The system further has means for verifying at each node that the information for the rendering device of the node properly transformed the input color image data into the output color image data, and means for revising the information stored in the data structure at the node responsive to results of the verifying means. Shared components of the data structure may also store color preferences selected by a user. The information producing means of the system may further operate responsive to both the color calibration data and the color preferences. The rendering devices in the system can provide color reproductions having three or four colorants, and may provide more than four output colors (color inks).
    • 160. 发明授权
    • Method for transforming a digital image from a first to a second colorant space
    • 用于将数字图像从第一着色剂空间转换成第二着色剂空间的方法
    • US07616345B2
    • 2009-11-10
    • US10718148
    • 2003-11-20
    • Marc Mahy
    • Marc Mahy
    • H04N1/40
    • H04N1/6052
    • A method for obtaining a first representation of a digital image by means of a first output device and a second representation of the digital image by means of a second output device, wherein the first output device has a first, device dependent, colorant space and the second output device has a second, device dependent, colorant space, the method including (a) determining a transformation for transforming a set of colorant values of a pixel of the digital image from the first to the second colorant space; (b) selecting a particular set of colorant values in the first colorant space; and (c) modifying the transformation for the particular set of colorant values.
    • 一种借助于第一输出设备获取数字图像的第一表示和借助于第二输出设备的数字图像的第二表示的方法,其中所述第一输出设备具有第一设备相关的着色剂空间, 第二输出设备具有第二设备相关的着色剂空间,该方法包括(a)确定用于将数字图像的像素的一组着色值从第一着色剂空间转换到第二着色剂空间的变换; (b)在第一着色剂空间中选择一组特定的着色剂值; 和(c)修改特定的着色剂值组的变换。