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公开(公告)号：US07365879B2
公开(公告)日：2008-04-29
申请号：US10845037
申请日：2004-05-13
CPC分类号： H04N1/60 , H04N1/6022
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US07535596B2
公开(公告)日：2009-05-19
申请号：US11121768
申请日：2005-05-04
CPC分类号： H04N1/6022
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US08427722B2
公开(公告)日：2013-04-23
申请号：US12793924
申请日：2010-06-04
摘要： A method for determining a blended color transform for use in producing printed colors on a color printer having at least four device color channels, comprising: forming first and second color transforms, wherein the first color transform produces printed colors that have a reduced sensitivity to color printer process variations in at least a first region of color space that includes a near-neutral color region, and wherein the second color transform produces printed colors that have a reduced image noise visibility in at least a second region of color space; defining a blending function which computes weighting values for the first and second color transforms as a function of input color values; and using a processor to determine the blended color transform by blending the first color transform and the second color transform, responsive to the blending function.
摘要翻译： 一种用于确定用于在具有至少四个设备颜色通道的彩色打印机上制作印刷颜色的混合色彩变换的方法，包括：形成第一和第二颜色变换，其中所述第一颜色变换产生具有降低的颜色敏感度的打印色彩 包括近中性色彩区域的至少第一颜色空间区域中的打印机处理变化，并且其中所述第二颜色变换产生在至少第二颜色空间区域中具有降低的图像噪声可视性的打印颜色; 定义混合函数，其计算作为输入颜色值的函数的第一和第二颜色变换的加权值; 以及响应于所述混合功能，使用处理器来通过混合所述第一颜色变换和所述第二颜色变换来确定所述混合颜色变换。
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公开(公告)号：US20110299143A1
公开(公告)日：2011-12-08
申请号：US12793924
申请日：2010-06-04
摘要： A method for determining a blended color transform for use in producing printed colors on a color printer having at least four device color channels, comprising: forming first and second color transforms, wherein the first color transform produces printed colors that have a reduced sensitivity to color printer process variations in at least a first region of color space that includes a near-neutral color region, and wherein the second color transform produces printed colors that have a reduced image noise visibility in at least a second region of color space; defining a blending function which computes weighting values for the first and second color transforms as a function of input color values; and using a processor to determine the blended color transform by blending the first color transform and the second color transform, responsive to the blending function.
摘要翻译： 一种用于确定用于在具有至少四个设备颜色通道的彩色打印机上制作印刷颜色的混合色彩变换的方法，包括：形成第一和第二颜色变换，其中所述第一颜色变换产生具有降低的颜色敏感度的打印色彩 包括近中性色彩区域的至少第一颜色空间区域中的打印机处理变化，并且其中所述第二颜色变换产生在至少第二颜色空间区域中具有降低的图像噪声可视性的打印颜色; 定义混合函数，其计算作为输入颜色值的函数的第一和第二颜色变换的加权值; 以及响应于所述混合功能，使用处理器来通过混合所述第一颜色变换和所述第二颜色变换来确定所述混合颜色变换。
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5.发明授权公开(公告)号：US06850342B2
公开(公告)日：2005-02-01
申请号：US10313077
申请日：2002-12-06
申请人： Geoffrey J. Woolfe , Robert E. Cookingham , John R. D'Errico , Jonathan B. Phillips , Karin Topfer
发明人： Geoffrey J. Woolfe , Robert E. Cookingham , John R. D'Errico , Jonathan B. Phillips , Karin Topfer
CPC分类号： H04N1/62
摘要： A method for generating a transform for converting a digital color image signal expressed as color values in a first color space having a first color gamut to code values for driving an output device having a second color gamut different from the first color gamut includes the steps of: transforming the color values of the first color space to color values in an intermediate color space; specifying one or more predefined color regions in an intermediate color space; preferentially mapping the color values in the intermediate color space into the second color gamut by smoothly translating the color values to fit the second color gamut while restricting the mapping to regions outside of the predefined color regions to produce enhanced modified color values in the intermediate color space; and transforming the modified color values to code values for driving the output device.
摘要翻译： 一种用于产生用于将表示为具有第一色域的第一颜色空间中的颜色值的数字彩色图像信号转换成用于驱动具有不同于第一色域的第二色域的输出装置的编码值的变换的方法，包括以下步骤： ：将第一颜色空间的颜色值转换为中间颜色空间中的颜色值; 指定中间颜色空间中的一个或多个预定义颜色区域; 通过平滑地平移颜色值以适应第二色域，同时限制对预定颜色区域之外的区域的映射，将中间颜色空间中的颜色值优先地映射到第二色域中，以在中间颜色空间中产生增强的修改颜色值 ; 以及将修改的颜色值转换为用于驱动输出设备的代码值。
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6.发明授权Color image reproduction apparatus having a digitally operated look-up table constructed by means of a least squares algorithm 失效具有通过最小二乘法构造的数字操作的查找表的彩色图像再现装置
公开(公告)号：US4992861A
公开(公告)日：1991-02-12
申请号：US259548
申请日：1988-10-18
申请人： John R. D'Errico
发明人： John R. D'Errico
IPC分类号： H04N1/60
CPC分类号： H04N1/6019 , H04N1/6011
摘要： Color image reproduction apparatus, including a video monitor and a computer-based workstation, provides for modifying an original color image read from an input film and for writing a reproduced image on an output film. A plurality of digitally operated look-up tables (LUTs), associated with the workstation, serve for transforming original imaging data to a common color space (CIELUV L* u* v*) and for transforming reproduced imaging data to different use-dependent RGB color spaces, e.g. video monitor, output film, etc. Color image values stored in each LUT are altered from exact color image values by means of a least squares algorithm to provide an average error of zero--an unbiased error--for linearly interpolated values derived from each LUT.
摘要翻译： 包括视频监视器和基于计算机的工作站的彩色图像再现装置提供修改从输入胶片读取的原始彩色图像并将输出胶片上的再现图像写入。 与工作站相关联的多个数字操作的查找表（LUT）用于将原始成像数据转换为公共颜色空间（CIELUV L * u * v *），并将再现的成像数据转换为不同的依赖于使用的RGB 颜色空间，例如 视频监视器，输出电影等。存储在每个LUT中的彩色图像值通过最小二乘法算法从准确的彩色图像值改变，以提供零 - 无偏差的平均误差 - 用于从每个LUT导出的线性内插值。
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公开(公告)号：US06894806B1
公开(公告)日：2005-05-17
申请号：US09540807
申请日：2000-03-31
CPC分类号： H04N1/62
摘要： A file of digital color data representing a color image is transformed into a new file of digital color data where one or more colors have been transformed to one or more new color locations where their reproduction is known to be preferred. The digital color data is provided in a multi-dimensional color space where the color locations to be operated on in the color space are designated as color magnets. The color space distance is then calculated between the color locations of the digital color data in the color space and the color magnets. A particular activity is prescribed for each color magnet that affects nearby color locations in the color space; this activity includes one or more activity selected from the group including attraction, repulsion, shielding and dragging. Then, the digital color data is mapped to new locations in the multi-dimensional color space as a function of the color space distance and the selected activity, wherein the degree or strength of activity is a function of the color space distance or direction in color space.
摘要翻译： 表示彩色图像的数字彩色数据的文件被转换成数字彩色数据的新文件，其中一个或多个颜色已被变换到一个或多个新颜色位置，其中它们的再现已知是优选的。 数字彩色数据被提供在多维颜色空间中，其中将在颜色空间中操作的颜色位置被指定为彩色磁体。 然后在颜色空间中的数字颜色数据的颜色位置和彩色磁体之间计算颜色空间距离。 对于影响颜色空间中的附近颜色位置的每个彩色磁体规定了特定的活动; 该活动包括选自包括吸引，排斥，屏蔽和拖曳在内的组中的一种或多种活性。 然后，将数字颜色数据作为颜色空间距离和所选活动的函数映射到多维颜色空间中的新位置，其中活动的程度或强度是颜色空间距离或颜色方向的函数 空间。
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8.发明授权Method and system for the reduction of memory capacity required for a digital representation of an image 失效用于减少图像的数字表示所需的存储容量的方法和系统公开(公告)号：US06185327B2
公开(公告)日：2001-02-06
申请号：US09072014
申请日：1998-05-04
IPC分类号： G06K900
CPC分类号： G06T9/005
摘要： A method for reducing a bit depth of an image to reduce storage memory, the method comprises the steps of creating a histogram of an image; modifying the histogram so that a maximum slope of a to-be-calculated cumulative histogram will be no greater than substantially 1.0; (c) calculating the cumulative histogram from the modified histogram; and (d) interpreting the cumulative histogram to give a desired bit depth reduction.
摘要翻译： 一种用于减少图像的位深度以减少存储存储器的方法，所述方法包括以下步骤：创建图像的直方图; 修改直方图，使得待计算的累积直方图的最大斜率将不大于基本上为1.0; （c）从修改的直方图计算累积直方图; 和（d）解释累积直方图以给出希望的位深度减少。
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