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    Methods and systems achieving print uniformity using reduced memory or computational requirements
    1.
    发明授权
    Methods and systems achieving print uniformity using reduced memory or computational requirements 有权
    使用减少的记忆或计算要求实现打印均匀性的方法和系统

    公开(公告)号：US08305660B2

    公开(公告)日：2012-11-06

    申请号：US10922316

    申请日：2004-08-19

    申请人： Yeqing (Juliet) Zhang ,  Daniel E. Viassolo ,  Susan J. Zoltner ,  Howard A. Mizes ,  Robert P. Loce

    发明人： Yeqing (Juliet) Zhang ,  Daniel E. Viassolo ,  Susan J. Zoltner ,  Howard A. Mizes ,  Robert P. Loce

    IPC分类号： H04N1/46 ,  H04N1/42

    CPC分类号： H04N1/407 ,  H04N1/4097

    摘要： Engine response curves (RCs) can be used for streak compensation for printed documents. A feedback control paradigm can be included to effect RC compensation. Singular Value Decomposition (SVD) can be used to represent each RC in the collection of spatial RC data as a linear combination of basis vectors. RCs are approximated by selecting the first few basis vectors, the approximation aiding in noise rejection and reducing computation in the controller by reducing dimensionality of the RC data from gray levels to the number of SVD bases selected. An optimal subset of RCs is selectable from the set of approximated RCs by clustering the SVD weights, the clustered SVD weights producing TRCs that span all engine response RCs generated by a printer. Compensation RCs are constructible using reduced number of bases and clustered SVD weights.

    摘要翻译： 发动机响应曲线（RC）可用于印刷文件的条纹补偿。 可以包括反馈控制范例来实现RC补偿。 奇异值分解（SVD）可以用于将空间RC数据的集合中的每个RC表示为基向量的线性组合。 通过选择前几个基本矢量近似，近似有助于噪声抑制，并通过将RC数据从灰度级降低到所选择的SVD基数来减少控制器中的计算。 通过对SVD权重进行聚类，可从集合的近似RC中选择RC的最佳子集，产生跨越由打印机产生的所有发动机响应RC的TRC的聚类SVD权重。 补偿RC可以使用减少的基数和聚类SVD权重来构建。

    Systems for spectral multiplexing of a source image and a background image to provide a composite image, for rendering the composite image, and for spectral demultiplexing of the composite images
    3.
    发明授权
    Systems for spectral multiplexing of a source image and a background image to provide a composite image, for rendering the composite image, and for spectral demultiplexing of the composite images 失效
    用于源图像和背景图像的频谱复用的系统以提供合成图像，用于渲染合成图像，以及用于合成图像的频谱解复用

    公开(公告)号：US07376264B2

    公开(公告)日：2008-05-20

    申请号：US10268246

    申请日：2002-10-09

    申请人： Robert P. Loce ,  Yeqing (Juliet) Zhang ,  Gaurav Sharma ,  Steven J. Harrington

    发明人： Robert P. Loce ,  Yeqing (Juliet) Zhang ,  Gaurav Sharma ,  Steven J. Harrington

    IPC分类号： G06K9/00

    CPC分类号： H04N1/4446

    摘要： Methods and apparatus for spectrally-encoding plural source images and for providing the spectrally-encoded plural source images in a composite image, for rendering the composite image on a substrate, or for recovering at least one of the encoded source images from the rendered composite image such that the recovered source image is made distinguishable. The rendered composite image includes at least a first source image that is encoded and rendered with use of a selected colorant so as to be visually discernible on the substrate during a plurality of modes of intended illumination as a “background” image, and a second, “narrow band” source image that is encoded in the composite image so as to be recovered when illuminated by at least a selected of the plurality of modes of intended illumination that employs complementary narrow band illuminant.

    摘要翻译： 用于频谱编码多个源图像并用于在合成图像中提供频谱编码的多个源图像的方法和装置，用于在基板上渲染合成图像，或用于从所渲染的合成图像中恢复至少一个编码源图像 使得恢复的源图像是可区分的。 所渲染的合成图像至少包括使用选定的着色剂编码和渲染的第一源图像，以便在作为“背景”图像的预定照明的多个模式期间在基板上在视觉上可辨别， 在合成图像中被编码的“窄带”源图像，以便在使用补充窄带光源的多个预期照明模式中的至少一个选择的照明下被恢复。