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    • 7. 发明授权
    • System and method for selecting the best set of devices for rendering color documents
    • US07352491B2
    • 2008-04-01
    • US10641205
    • 2003-08-14
    • Raja BalaGaurav SharmaRobert J. Rolleston
    • Raja BalaGaurav SharmaRobert J. Rolleston
    • H04N1/40
    • H04N1/603H04N1/6058
    • The system for selecting a best device for rendering a color document involves first determining the types of color data included in the color document to be printed. Once the type of color data has been determined, the color characteristics are matched against the strengths of the available output devices to obtain a list of devices best suited for this particular color print job. At least one device from the list of best devices is selected and the color document is rendered onto the selected device. Preferably, the types of color data involved are determined by the mix of defined colorimetry and undefined colorimetry in the color document. Alternatively, the types of color data are determined by analyzing the colorspaces in the document (i.e., RGB, CMYK, LAB, XYZ, etc.), and the embedded profiles, if any, in the document (e.g., sRGB, SWOPCMYK, Euroscale). In the instance wherein a number of devices match the criteria for selection, only those devices which honor embedded color profiles are selected for documents containing embedded profiles. Alternatively, only those devices are selected that produce a consistent rendering across multiple color spaces and profiles for documents with a mix of color spaces and profiles. Selecting the best device may also depend on whether the type of print job is considered to be Job-Balancing or Job-Splitting. With Job-Balancing, at least one of the metrics is used: (i) Intersection Gamut Volume, (ii) Gamut Similarity, or (iii) Mismatch Between Document Colors and Intersection Gamut for device selection. With Job-Splitting, at least one of these metrics are used: (i) Individual Gamut Volume, or (ii) Mismatch Between Document Colors and Device Gamut. Colorimetric definition of the selected colors can be retrieved from either an embedded source profile or by default and mapping the colors to the output gamut.
    • 9. 发明授权
    • System and method for obtaining color consistency for a color print job across multiple output devices
    • 用于在多个输出设备上获得彩色打印作业的颜色一致性的系统和方法
    • US08120812B2
    • 2012-02-21
    • US10640835
    • 2003-08-14
    • Gaurav SharmaRaja BalaRobert J. Rolleston
    • Gaurav SharmaRaja BalaRobert J. Rolleston
    • G06F15/00
    • H04N1/6058H04N1/603
    • A method for maintaining color consistency in an environment of networked devices is disclosed. The method involves identifying a group of devices to which a job is intended to be rendered; obtaining color characteristics from devices in the identified group; modifying the job based on the obtained color characteristics; and rendering the job on one or more of the devices. Modifications are computed by a transform determined by using the color characteristics of the output devices along with the content of the job itself. The method further maps colors in the original job to the output devices' common gamut, i.e., intersection of the gamuts of the individual printers wherein the color gamut of each device is obtained from a device characterization profile either by retrieving the gamut tag or by derivation using the characterization data in the profile.
    • 公开了一种用于在网络设备的环境中维持颜色一致性的方法。 该方法涉及识别旨在呈现作业的一组设备; 从识别组中的设备获得颜色特征; 基于获得的颜色特性修改作业; 并在一个或多个设备上呈现作业。 通过使用输出设备的颜色特性以及作业本身的内容确定的变换来计算修改。 该方法进一步将原始作业中的颜色映射到输出设备的公共色域,即各个打印机的色域的相交,其中通过检索色域标签或通过衍生获得每个设备的色域,从设备表征简档 使用配置文件中的表征数据。