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    Colorant control values for color printing devices
    1.
    发明授权
    Colorant control values for color printing devices 失效
    彩色打印设备的着色剂控制值

    公开(公告)号：US07535596B2

    公开(公告)日：2009-05-19

    申请号：US11121768

    申请日：2005-05-04

    Applicant: Kevin E. Spaulding ,  Gustav J. Braun ,  John R. D'Errico

    Inventor： Kevin E. Spaulding ,  Gustav J. Braun ,  John R. D'Errico

    IPC: G03F3/08 ,  G06K15/00

    CPC classification number: H04N1/6022

    Abstract: A method for determining colorant control values for a color imaging device having four or more colorants is disclosed. The method includes defining a color mapping for a set of paths through a three-channel color space, defining a color mapping function for the three-channel color space relating the three-channel color space values to colorant control values for the four or more colorants of the color imaging device by interpolating between the color mapping defined for the set of paths, forming a forward three-channel color model relating the three-channel color space values to device-independent color values, inverting the forward three-channel color model to determine an inverse three-channel color model relating the device-independent color values to the three-channel color space values, and combining the inverse three-channel color model and the color mapping function to determine an inverse device color model.

    Abstract translation: 公开了一种用于确定具有四种或更多种着色剂的彩色成像装置的着色剂控制值的方法。 该方法包括通过三通道颜色空间定义一组路径的颜色映射，为三通道颜色空间值与四个或更多个着色剂的着色剂控制值定义三通道颜色空间的颜色映射功能 通过在为该组路径定义的颜色映射之间进行内插，形成将三通道颜色空间值与设备无关的颜色值相关联的前向三通道颜色模型，将前向三通道颜色模型反转到 确定将与设备无关的颜色值与三通道色彩空间值相关联的反向三通道颜色模型，并组合逆三通道颜色模型和颜色映射功能以确定逆设备颜色模型。

    Halftone dot-growth technique using a dot edge-detection scheme
    3.
    发明授权
    Halftone dot-growth technique using a dot edge-detection scheme 有权

    公开(公告)号：US07116447B2

    公开(公告)日：2006-10-03

    申请号：US10154546

    申请日：2002-05-24

    Applicant: Gustav J. Braun ,  Peter D. Burns ,  Kevin E. Spaulding

    Inventor： Gustav J. Braun ,  Peter D. Burns ,  Kevin E. Spaulding

    IPC: H04N1/405 ,  H04N1/52 ,  H04N1/409 ,  H04N1/58 ,  G06T5/00

    CPC classification number: H04N1/4055

    Abstract: A method for color correcting an original halftone bitmap image by a predefined color correction function to produce a color corrected halftone bitmap image comprising: providing an original halftone bitmap image; estimating the dot area percentage of the original halftone bitmap image in a set of sub-image blocks; calculating an aim dot area percentage, based on a predefined color correction function, for each sub-image block in the original halftone bitmap image, calculating the number of halftone bitmap image pixels to convert to on or off states to produce a modified original halftone bitmap image that has the aim dot area percentage where said value is designated by N, for each sub-image block in the original halftone bitmap image, and converting N pixels in the original halftone bitmap image to either on or off states depending on whether the aim dot area percentage is greater or less than the dot area percentage of the original halftone bitmap image respectively, for each sub-image block in the original halftone bitmap image.

    Determining sets of n-dimensional colorant control signals
    4.
    发明授权
    Determining sets of n-dimensional colorant control signals 有权
    确定n维着色剂控制信号的集合

    公开(公告)号：US07365879B2

    公开(公告)日：2008-04-29

    申请号：US10845037

    申请日：2004-05-13

    Applicant: Gustav J. Braun ,  John R. D'Errico ,  Kevin E. Spaulding ,  Douglas W. Couwenhoven

    Inventor： Gustav J. Braun ,  John R. D'Errico ,  Kevin E. Spaulding ,  Douglas W. Couwenhoven

    IPC: H04N1/60 ,  G09G5/02

    CPC classification number: H04N1/60 ,  H04N1/6022

    Abstract: A method for determining a set of n-dimensional colorant control signals that map to a point P in an m-dimensional color space where n>m, including determining a forward device model that maps n-dimensional colorant control signals to m-dimensional color space signals; determining a set of n-dimensional colorant control signal simplexes that span a domain of the forward device model; and determining a set of range space simplexes in the m-dimensional color space corresponding to the set of n-dimensional colorant control space signal simplexes by mapping the vertices of the n-dimensional colorant control signal simplexes into the m-dimensional color space using the forward device model. The method also includes specifying a point P in the m-dimensional color space; and determining the set of n-dimensional colorant control signals that map to the point P in the m-dimensional color space, by performing m sequential slicing processes through the set of range space simplexes.

    Abstract translation: 一种用于确定映射到m维色空间中的点P的n维着色剂控制信号的集合的方法，包括确定将n维着色剂控制信号映射到m维颜色的正向设备模型 空间信号; 确定跨越前向设备模型的域的一组n维着色剂控制信号单体; 以及通过将所述n维着色剂控制信号单面的顶点通过将所述n维着色剂控制信号单面的顶点映射到所述m维色彩空间中来确定与所述一组n维着色剂控制空间信号单面相对应的m维色彩空间中的一组范围空间单性 正向设备型号。 该方法还包括在m维颜色空间中指定点P; 以及通过在所述一维范围空间单位中执行m次连续切片处理，确定映射到m维色彩空间中的点P的n维着色剂控制信号的集合。

    Color transforms for concave device gamuts
    5.
    发明授权
    Color transforms for concave device gamuts 有权
    凹面设备色域的颜色变换

    公开(公告)号：US07583406B2

    公开(公告)日：2009-09-01

    申请号：US11210168

    申请日：2005-08-23

    Applicant: Kevin E. Spaulding ,  Gustav J. Braun

    Inventor： Kevin E. Spaulding ,  Gustav J. Braun

    IPC: H04N1/60

    CPC classification number: H04N1/6058

    Abstract: Method for building color transforms for color imaging devices having concave color gamut regions, including forming a device model that relates device control signals for a color imaging device to corresponding device-independent color values in a device-independent color space; forming a device color gamut representing the set of colors in the device-independent color space that are producible by the color imaging device; and forming a convex color gamut by fitting a convex hull to the device color gamut. The method further includes forming an expanded device model that relates device control signals for the color imaging device to expanded device-independent color values in the device-independent color space, such that the expanded device-independent color values fill the convex color gamut; and building a color transform that relates input device-independent color values to corresponding device control signals for the color imaging device using the expanded device model.

    Abstract translation: 一种用于构建具有凹色域区域的彩色成像装置的彩色变换的方法，包括在与装置无关的色彩空间中形成将彩色成像装置的装置控制信号与相应装置无关的颜色值相关联的装置模型; 形成表示由所述彩色成像装置可生产的与装置无关的颜色空间中的颜色集合的装置色域; 以及通过将凸包装配到装置色域来形成凸色域。 该方法进一步包括形成扩展装置模型，该装置模型将彩色成像装置的装置控制信号与装置无关色彩空间中扩大的与装置无关的颜色值相关联，使得扩大装置无关颜色值填充凸色域; 以及使用扩展的设备模型构建将输入设备无关颜色值与用于彩色成像设备的相应设备控制信号相关联的颜色变换。

    COLOR ERROR DIFFUSION WITH ERROR SIGNAL OFFSET
    7.
    发明申请
    COLOR ERROR DIFFUSION WITH ERROR SIGNAL OFFSET 有权
    带有错误信号偏移的颜色错误扩散

    公开(公告)号：US20110211229A1

    公开(公告)日：2011-09-01

    申请号：US13105063

    申请日：2011-05-11

    Applicant: Kevin E. Spaulding ,  Douglas W. Couwenhoven

    Inventor： Kevin E. Spaulding ,  Douglas W. Couwenhoven

    IPC: H04N1/405

    CPC classification number: H04N1/52

    Abstract: A method for multi-toning an input digital image having input pixels with two or more color channels to form an output digital image having modified output levels. The method includes determining modified output levels using a combined error signal formed from intermediate error signals for each color channel together with an error signal offset value, and adjusting the input levels for the nearby pixels responsive to weighted error signals.

    Abstract translation: 一种用于多输入具有两个或多个颜色通道的输入像素的输入数字图像以形成具有修改的输出电平的输出数字图像的方法。 该方法包括使用由每个颜色通道的中间误差信号形成的组合误差信号以及误差信号偏移值来确定修正的输出电平，以及响应于加权误差信号调整附近像素的输入电平。

    DIGITAL PRINTING USING SIMILAR COLORANTS
    9.
    发明申请
    DIGITAL PRINTING USING SIMILAR COLORANTS 有权
    使用类似颜色的数字打印

    公开(公告)号：US20100141970A1

    公开(公告)日：2010-06-10

    申请号：US12330552

    申请日：2008-12-09

    Applicant: Douglas W. Couwenhoven ,  Kevin E. Spaulding

    Inventor： Douglas W. Couwenhoven ,  Kevin E. Spaulding

    IPC: H04N1/60

    CPC classification number: H04N1/60

    Abstract: A method for printing an input digital image using a digital printer having a set of colorants with substantially the same color but different densities, including a sequence of node points where each of the two or more colorants are either at their maximum or minimum values, setting colorant concentrations such that the color channel output responses corresponding to the sequence of node points are substantially equally spaced in a visually uniform color space; forming colorant control look-up tables to provide smooth transitions in the color channel output response between the sequence of node points; addressing the colorant control look-up tables with the printer code value for each pixel of the input digital image to determine the colorant control signals for each of the two or more colorants; and controlling the digital printer using the colorant control signals to produce a print of the input digital image.

    Abstract translation: 一种使用具有基本上相同颜色但不同密度的一组着色剂的数字打印机打印输入数字图像的方法，包括其中两个或更多个着色剂中的每一个处于其最大值或最小值的节点点序列，设置 着色剂浓度使得对应于节点点序列的颜色通道输出响应在视觉均匀的颜色空间中基本相等间隔; 形成着色剂控制查找表，以在节点间序列中的颜色通道输出响应中提供平滑过渡; 使用输入数字图像的每个像素的打印机代码值寻址着色剂控制查找表，以确定两种或更多种着色剂中的每一种的着色剂控制信号; 以及使用着色剂控制信号来控制数字打印机以产生输入数字图像的打印。

    SCANNER METAMERISM CORRECTION
    10.
    发明申请
    SCANNER METAMERISM CORRECTION 失效
    扫描仪元素校正

    公开(公告)号：US20080239334A1

    公开(公告)日：2008-10-02

    申请号：US11694098

    申请日：2007-03-30

    Applicant: David W. Jasinski ,  Kevin E. Spaulding ,  James A. Reczek

    Inventor： David W. Jasinski ,  Kevin E. Spaulding ,  James A. Reczek

    IPC: G06K15/00

    CPC classification number: H04N1/6094 ,  H04N1/603

    Abstract: A method for automatically compensating for scanner metamerism errors associated with scanning input images using a digital color image scanner, wherein the input images can be on a variety of different input media having colorants with different spectral characteristics, comprising scanning an input image on a digital color image scanner to produce a scanned image; determining one or more estimated color balance error values in a color balance parameter space by analyzing the scanned image using a color balance analysis algorithm; assigning an input medium from a set of possible input media for the scanned input image in response to the estimated color balance error values; selecting a scanner metamerism correction color transform associated with the assigned input medium; and applying the selected scanner metamerism correction color transform to the scanned image to produce a corrected image compensated for scanner metamerism errors.

    Abstract translation: 一种用于自动补偿与使用数字彩色图像扫描器扫描输入图像相关的扫描器同色异谱误差的方法，其中所述输入图像可以在具有不同光谱特性的着色剂的各种不同输入介质上，包括以数字颜色扫描输入图像 图像扫描仪产生扫描图像; 通过使用颜色平衡分析算法分析扫描图像来确定颜色平衡参数空间中的一个或多个估计的颜色平衡误差值; 响应于估计的颜色平衡误差值，从扫描的输入图像的一组可能的输入介质中分配输入介质; 选择与分配的输入介质相关联的扫描器同色异谱校正颜色变换; 以及将所选择的扫描器同色异谱校正颜色变换应用于扫描图像，以产生补偿扫描器同色异谱误差的校正图像。

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