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    Gamut Clipping with Preprocessing
    11.
    发明申请
    Gamut Clipping with Preprocessing 有权
    色域预处理

    公开(公告)号：US20110051207A1

    公开(公告)日：2011-03-03

    申请号：US12549971

    申请日：2009-08-28

    Applicant: John C. Dalrymple ,  James Zhixin Chang ,  Chizu Watanabe

    Inventor： John C. Dalrymple ,  James Zhixin Chang ,  Chizu Watanabe

    IPC: G03F3/08

    CPC classification number: H04N1/6058

    Abstract: A method is provided for gamut clipping with preprocessing enabled as software instructions stored in a computer-readable medium and executable by a processor. The instructions provide a color in a color space defined by at least three attributes. If the color lies outside a gamut boundary in the first color space, a distance is measured from the color to the gamut boundary. In response to the measured distance, a weight is calculated for an attribute of the color. Then, it is determined if the attribute of the color is to be shifted. If so, an attribute shift amount is derived. The attribute shift amount of the color is modified by applying the weighting. The attribute of the first color is shifted by the weighted attribute shift amount, creating a post-processed color. The post-processed color is then clipped.

    Abstract translation: 提供了一种用于色域削波的方法，其中预处理使能作为存储在计算机可读介质中并由处理器执行的软件指令。 指令提供由至少三个属性定义的颜色空间中的颜色。 如果颜色位于第一颜色空间中的色域边界之外，则从颜色到色域边界测量距离。 响应于测量的距离，针对颜色的属性计算权重。 然后，确定颜色的属性是否被移动。 如果是，则导出属性偏移量。 通过应用加权来修改颜色的属性偏移量。 第一种颜色的属性偏移加权属性偏移量，创建后处理颜色。 然后修剪后处理的颜色。

    Adaptive generation of perceptually uniform samples for printer characterization
    12.
    发明授权
    Adaptive generation of perceptually uniform samples for printer characterization 有权
    用于打印机表征的感知统一样本的适应性生成

    公开(公告)号：US07256912B2

    公开(公告)日：2007-08-14

    申请号：US10606056

    申请日：2003-06-25

    Applicant: James Zhixin Chang

    Inventor： James Zhixin Chang

    IPC: G06F15/00

    CPC classification number: G06F15/00 ,  H04N1/6033

    Abstract: A method is provided for adaptively generating perceptually uniform printer characterization samples in a three-dimensional (3-D) signal space. The method comprises: generating lines, each including a plurality of samples, in a printer 3-D signal space; printing signal space color targets; measuring the signal space color targets; generating lines with a plurality of perceptually uniform samples; generating polygon shapes in the 3-D signal space from the perceptually uniform sampled lines; calculating addition perceptually uniform sample points associated with each polygon; and, generating a final target in the printer 3-D signal space using the calculated perceptually uniform sample points. In one aspect, generating lines, includes: for each line, generating a metric distance function; creating a plurality of perceptually uniform samples on the function output axis; and, using the inverse of the metric distance function, mapping perceptually uniform samples onto the line.

    Abstract translation: 提供一种用于在三维（3-D）信号空间中自适应地生成感知统一的打印机表征样本的方法。 该方法包括：在打印机3-D信号空间中生成各自包括多个样本的线; 打印信号空间颜色目标; 测量信号空间的颜色目标; 生成具有多个感知统一样本的线; 从感知统一的采样线在3-D信号空间中产生多边形形状; 计算与每个多边形相关联的感知统一采样点的加法; 并且使用所计算的感知统一的采样点在打印机3-D信号空间中产生最终目标。 一方面，生成线包括：对于每一行，生成度量距离函数; 在功能输出轴上产生多个感知统一的样本; 并且使用度量距离函数的倒数，将感知统一的样本映射到该行上。

    Gamut clipping with preprocessing
    13.
    发明授权
    Gamut clipping with preprocessing 有权
    带有预处理的色域裁剪

    公开(公告)号：US08643922B2

    公开(公告)日：2014-02-04

    申请号：US12549971

    申请日：2009-08-28

    Applicant: John Dairymple ,  James Zhixin Chang ,  Chizu Watanabe

    Inventor： John Dairymple ,  James Zhixin Chang ,  Chizu Watanabe

    IPC: G03F3/08

    CPC classification number: H04N1/6058

    Abstract: A method is provided for gamut clipping with preprocessing enabled as software instructions stored in a computer-readable medium and executable by a processor. The instructions provide a color in a color space defined by at least three attributes. If the color lies outside a gamut boundary in the first color space, a distance is measured from the color to the gamut boundary. In response to the measured distance, a weight is calculated for an attribute of the color. Then, it is determined if the attribute of the color is to be shifted. If so, an attribute shift amount is derived. The attribute shift amount of the color is modified by applying the weighting. The attribute of the first color is shifted by the weighted attribute shift amount, creating a post-processed color. The post-processed color is then clipped.

    Abstract translation: 提供了一种用于色域削波的方法，其中预处理使能作为存储在计算机可读介质中并由处理器执行的软件指令。 指令提供由至少三个属性定义的颜色空间中的颜色。 如果颜色位于第一颜色空间中的色域边界之外，则从颜色到色域边界测量距离。 响应于测量的距离，针对颜色的属性计算权重。 然后，确定颜色的属性是否被移动。 如果是，则导出属性偏移量。 通过应用加权来修改颜色的属性偏移量。 第一种颜色的属性偏移加权属性偏移量，创建后处理颜色。 然后修剪后处理的颜色。

    Methods and systems for sampling and modeling of colorant-limited, multi-colorant color spaces
    15.
    发明授权
    Methods and systems for sampling and modeling of colorant-limited, multi-colorant color spaces 有权
    用于着色剂限制的多着色剂色彩空间的采样和建模的方法和系统

    公开(公告)号：US08358441B2

    公开(公告)日：2013-01-22

    申请号：US12416590

    申请日：2009-04-01

    Applicant: James Zhixin Chang ,  Chizu Watanabe

    Inventor： James Zhixin Chang ,  Chizu Watanabe

    IPC: H04N1/40

    CPC classification number: H04N1/6033 ,  H04N1/6016 ,  H04N1/6097

    Abstract: Aspects of the present invention relate to methods and systems for determining output responses and device targets for multi-colorant output devices. Some aspects relate to methods and systems for multi-dimensional rectilinear sampling, transformation of samples from an unlimited colorant space to a colorant-limited space, obtaining additional samples within a colorant-limitation hyperplane and interpolation of values in a colorant-limited space.

    Abstract translation: 本发明的方面涉及用于确定多着色剂输出装置的输出响应和装置目标的方法和系统。 一些方面涉及用于多维直线取样的方法和系统，将样品从无限着色剂空间转变为着色剂限制空间，在着色剂限制超平面内获得附加样品以及在着色剂受限空间内插值。

    Methods and Systems for Sampling and Modeling of Colorant-Limited, Multi-Colorant Color Spaces
    17.
    发明申请
    Methods and Systems for Sampling and Modeling of Colorant-Limited, Multi-Colorant Color Spaces 有权
    着色剂有限，多色颜色空间的采样和建模方法和系统

    公开(公告)号：US20100253698A1

    公开(公告)日：2010-10-07

    申请号：US12416590

    申请日：2009-04-01

    Applicant: James Zhixin Chang ,  Chizu Watanabe

    Inventor： James Zhixin Chang ,  Chizu Watanabe

    IPC: G09G5/02 ,  G06K9/00 ,  G03F3/08

    CPC classification number: H04N1/6033 ,  H04N1/6016 ,  H04N1/6097

    Abstract: Aspects of the present invention relate to methods and systems for determining output responses and device targets for multi-colorant output devices. Some aspects relate to methods and systems for multi-dimensional rectilinear sampling, transformation of samples from an unlimited colorant space to a colorant-limited space, obtaining additional samples within a colorant-limitation hyperplane and interpolation of values in a colorant-limited space.

    Abstract translation: 本发明的方面涉及用于确定多着色剂输出装置的输出响应和装置目标的方法和系统。 一些方面涉及用于多维直线取样的方法和系统，将样品从无限着色剂空间转变为着色剂限制空间，在着色剂限制超平面内获得附加样品以及在着色剂受限空间内插值。

    Efficient document boundary determination
    18.
    发明授权
    Efficient document boundary determination 有权
    有效的文件边界确定

    公开(公告)号：US06987880B2

    公开(公告)日：2006-01-17

    申请号：US09814585

    申请日：2001-03-22

    Applicant: John E. Dolan ,  John C. Dalrymple ,  James Zhixin Chang ,  Xiao-fan Feng

    Inventor： John E. Dolan ,  John C. Dalrymple ,  James Zhixin Chang ,  Xiao-fan Feng

    IPC: G06K9/00 ,  G06K9/48

    CPC classification number: G06K9/3283

    Abstract: An imaging system includes an imaging sensing device sensing an object having a first background color and a backing in opposing relationship with the object having a second background color which is substantially the same as the first background color. The imaging system determines at least one general bounding region of the object based upon a shadow cast onto backing by the object.

    Abstract translation: 成像系统包括感测具有第一背景颜色的对象的成像感测装置和与对象具有与第一背景颜色基本相同的第二背景颜色的对象关系的背景。 成像系统基于被物体背衬上的阴影投影来确定物体的至少一个一般的界限区域。

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