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公开(公告)号：US08570599B2
公开(公告)日：2013-10-29
申请号：US13165137
申请日：2011-06-21
申请人： Christopher J. Edge
发明人： Christopher J. Edge
CPC分类号： H04N1/6033
摘要： A method of characterizing an imaging system is described includes printing a color chart having a plurality of predetermined color patches; measuring the color patches to obtain colorimetric data; initializing a Neugebauer model with the Neugebauer solids of said colorimetric data; optimizing the global parameters of the Neugebauer model; optimizing the parameters associated with Demichel terms based on the Neugebauer primary associated with the Demichel term; optimizing parameters that vary with device coordinates; and creating a characterization file for the imaging system.
摘要翻译： 描述了一种表征成像系统的方法，包括：打印具有多个预定色块的色彩图; 测量色块以获得比色数据; 初始化Neugebauer模型与Neugebauer固体的所述比色数据; 优化Neugebauer模型的全球参数; 根据与Demichel术语相关的Neugebauer初级，优化与Demichel术语相关的参数; 优化随设备坐标变化的参数; 并为成像系统创建表征文件。
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公开(公告)号：US20130100466A1
公开(公告)日：2013-04-25
申请号：US13280702
申请日：2011-10-25
IPC分类号： H04N1/60
CPC分类号： H04N1/603 , H04N1/6022
摘要： A method for forming a color transform for a color printing device having a plurality of colorant channels that includes applying a colorant control value transformation function characterized by a set of transformation function parameters. An optimization process is used to optimize a merit function including a gamut shape term. The method involves determining an initial merit function value responsive to an initial gamut shape determined using the initial set of transformation function parameters. Modified transformation function parameters are determined that produce a modified gamut shape and provide an improved merit function value.
摘要翻译： 一种用于形成具有多个着色剂通道的彩色打印装置的颜色变换的方法，包括施加以一组变换函数参数为特征的着色剂控制值变换函数。 优化过程用于优化包括色域形状项的优值函数。 该方法包括根据使用初始变换函数参数集确定的初始色域形状来确定初始优值函数值。 确定修正变换函数参数，其产生改进的色域形状并提供改进的优值函数值。
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公开(公告)号：US20120327477A1
公开(公告)日：2012-12-27
申请号：US13165137
申请日：2011-06-21
申请人： Christopher J. Edge
发明人： Christopher J. Edge
CPC分类号： H04N1/6033
摘要： A method of characterizing an imaging system is described includes printing a color chart having a plurality of predetermined color patches; measuring the color patches to obtain colorimetric data; initializing a Neugebauer model with the Neugebauer solids of said colorimetric data; optimizing the global parameters of the Neugebauer model; optimizing the parameters associated with Demichel terms based on the Neugebauer primary associated with the Demichel term; optimizing parameters that vary with device coordinates; and creating a characterization file for the imaging system.
摘要翻译： 描述了一种表征成像系统的方法，包括：打印具有多个预定色块的色彩图; 测量色块以获得比色数据; 初始化Neugebauer模型与Neugebauer固体的所述比色数据; 优化Neugebauer模型的全局参数; 根据与Demichel术语相关的Neugebauer初级，优化与Demichel术语相关的参数; 优化随设备坐标变化的参数; 并为成像系统创建表征文件。
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公开(公告)号：US08223336B2
公开(公告)日：2012-07-17
申请号：US12533313
申请日：2009-07-31
申请人： Christopher J. Edge
发明人： Christopher J. Edge
IPC分类号： G01N21/25
CPC分类号： G01J3/46 , G01J3/465 , G01J3/506 , G01J3/51 , G01J3/513 , G01J2003/466 , H04N1/6052
摘要： A method for characterizing a color in terms of tristimulus values, the method includes providing a source of a color; measuring a set of spectral values for color stimulus associated with the color using a spectral measurement device controlled by a digital processing system; calculating a first set of tristimulus values from the set of spectral values; defining a set of human observer color matching functions, the set of human observer color matching functions being functions of the tristimulus values; and determining a second set of tristimulus values from the set of spectral values using set of human observer color matching functions.
摘要翻译： 一种用于根据三色刺激值表征颜色的方法，所述方法包括提供颜色源; 使用由数字处理系统控制的光谱测量装置测量与颜色相关联的颜色刺激的一组光谱值; 从所述一组光谱值计算第一组三刺激值; 定义一组人类观察者颜色匹配函数，该人体观察者颜色匹配函数集合是三刺激值的函数; 以及使用一组人类观察者颜色匹配函数，从所述一组光谱值确定第二组三刺激值。
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公开(公告)号：US20110255101A1
公开(公告)日：2011-10-20
申请号：US12760600
申请日：2010-04-15
申请人： Christopher J. Edge
发明人： Christopher J. Edge
IPC分类号： H04N1/60
CPC分类号： H04N1/6058
摘要： A method for applying gamut mapping to an input digital image having an associated input color gamut, to produce an output digital image having an associated output color gamut, which includes: defining a gamut mapping color transform which embodies the operations of transforming input color values from the input color space to linear RGB color values for a linear RGB color space, wherein the linear RGB color space has desirable hue preserving characteristics; transforming the linear RGB color values to determine nonlinear RGB color values; applying a 3×3 matrix transformation to the nonlinear RGB values to an opponent color space; applying a gamut mapping function to map opponent color values within the input color gamut to produce modified opponent color values within the output color gamut; and transforming the modified opponent color values to produce the output color values in the output color space.
摘要翻译： 一种将色域映射应用于具有相关输入色域的输入数字图像的方法，用于产生具有相关联的输出色域的输出数字图像，其包括：定义色域映射颜色变换，其体现了将输入颜色值从 线性RGB颜色空间的线性RGB颜色值的输入颜色空间，其中线性RGB颜色空间具有期望的色调保持特性; 转换线性RGB颜色值以确定非线性RGB颜色值; 将3×3矩阵变换应用于非对称RGB值到对方颜色空间; 应用色域映射函数来映射输入色域内的对象颜色值，以在输出色域内产生修改的对手颜色值; 以及变换所述修改的对手颜色值以在所述输出颜色空间中产生所述输出颜色值。
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公开(公告)号：US20110026821A1
公开(公告)日：2011-02-03
申请号：US12533451
申请日：2009-07-31
申请人： Christopher J. Edge
发明人： Christopher J. Edge
IPC分类号： G06K9/00
摘要： A method for matching colors including comparing the appearance of a first white color associated with a first color imaging system and a second white color associated with a second color imaging system, wherein the tristimulus values of the first and second white color are similar; determining a fixed correction to the tristimulus values of the second white color to achieve a visual match to the first white color; measuring a first set of spectral values for a first color associated with the first color imaging system; determining a first set of tristimulus values from the first set of spectral values; measuring a second set of spectral values for a second color associated with the second color imaging system; determining a second set of tristimulus values from the second set of spectral values; applying a correction to the tristimulus values of the second color; determining a difference between the tristimulus value of the first color and the corrected tristimulus value of the second color; and adjusting the second color to reduce the difference.
摘要翻译： 一种用于匹配颜色的方法，包括比较与第一彩色成像系统相关联的第一白色的外观和与第二彩色成像系统相关联的第二白色，其中第一和第二白色的三刺激值相似; 确定对所述第二白色的三刺激值的固定校正，以实现与所述第一白色的视觉匹配; 测量与第一彩色成像系统相关联的第一颜色的第一组光谱值; 从所述第一组频谱值确定第一组三刺激值; 测量与第二彩色成像系统相关联的第二颜色的第二组光谱值; 从所述第二组光谱值确定第二组三刺激值; 对所述第二颜色的三刺激值应用校正; 确定第一颜色的三刺激值和第二颜色的校正三刺激值之间的差; 并调整第二种颜色以减少差异。
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公开(公告)号：US20110026027A1
公开(公告)日：2011-02-03
申请号：US12533313
申请日：2009-07-31
申请人： Christopher J. Edge
发明人： Christopher J. Edge
CPC分类号： G01J3/46 , G01J3/465 , G01J3/506 , G01J3/51 , G01J3/513 , G01J2003/466 , H04N1/6052
摘要： A method for characterizing a color in terms of tristimulus values, the method includes providing a source of a color; measuring a set of spectral values for color stimulus associated with the color using a spectral measurement device controlled by a digital processing system; calculating a first set of tristimulus values from the set of spectral values; defining a set of human observer color matching functions, the set of human observer color matching functions being functions of the tristimulus values; and determining a second set of tristimulus values from the set of spectral values using set of human observer color matching functions.
摘要翻译： 一种用于根据三色刺激值表征颜色的方法，所述方法包括提供颜色源; 使用由数字处理系统控制的光谱测量装置测量与颜色相关联的颜色刺激的一组光谱值; 从所述一组光谱值计算第一组三刺激值; 定义一组人类观察者颜色匹配函数，该人体观察者颜色匹配函数集合是三刺激值的函数; 以及使用一组人类观察者颜色匹配函数，从所述一组光谱值确定第二组三刺激值。
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公开(公告)号：US07710597B2
公开(公告)日：2010-05-04
申请号：US10883006
申请日：2004-07-01
申请人： Christopher J. Edge
发明人： Christopher J. Edge
CPC分类号： H04N1/6011 , H04N1/603
摘要： A technique for profiling a color printing device employs a modified Neugebauer color mixing model. The modeling technique makes use of a variable dot gain value and “n factor.” The variable dot gain adjustment value may vary according to the particular tristimulus channel under evaluation. In addition, the variable dot gain value may vary according to the particular Neugebauer primary over which a halftone dot is printed. Accordingly, the technique may rely on an array of different dot gain values and n factors that correspond to different combinations of color channels and overprint conditions. As a further feature, the techniques may rely on a dot gain formula that relates halftone dot variation, i.e., fringe thickness, to the size of the halftone dot. This relationship tends to produce a dot gain model that more closely resembles the actual dot gain behavior on a printing press.
摘要翻译： 彩色印刷装置的成型技术采用改良的Neugebauer混色模型。 建模技术利用可变点增益值和“n因子”。可变网点增益调整值可能根据评估中的特定三刺激通道而变化。 此外，可变点增益值可以根据打印半色调点的特定的Neugebauer初级而变化。 因此，该技术可以依赖于对应于颜色通道和套印条件的不同组合的不同点增益值和n因子的阵列。 作为另一个特征，这些技术可以依赖于将半色调点变化即条纹厚度与半色调点的大小相关联的点增益公式。 这种关系往往会产生一个更接近于印刷机上实际的网点增益行为的点增益模型。
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9.发明授权Color correction techniques for correcting color profiles or a device-independent color space 有权用于校正颜色配置文件或与设备无关的颜色空间的颜色校正技术公开(公告)号：US07710432B2
公开(公告)日：2010-05-04
申请号：US11311581
申请日：2005-12-14
申请人： Christopher J. Edge
发明人： Christopher J. Edge
CPC分类号： H04N1/6033 , H04N1/6086
摘要： According to an embodiment of the present invention, selective tristimulus corrections to device-independent coordinates are applied using a piecewise linear correction function. The piecewise linear correction function is defined such that a maximum of the piecewise linear correction function occurs at a boundary condition of a corresponding device-dependent color space, and the piecewise linear correction function is linearly reduced to zero or approximately zero as values in the corresponding device-dependent color space approach either a different boundary condition or a neutral axis. By having the piecewise linear correction function reduce linearly to zero or approximately zero, corrections to one region of color smoothly diminish and blend into the other regions of color, thereby substantially preventing the introduction of artifacts or image corruption due to the corrections.
摘要翻译： 根据本发明的实施例，使用分段线性校正函数来应用与装置无关的坐标的选择性三刺激校正。 分段线性校正函数被定义为使得分段线性校正函数的最大值出现在相应的器件相关色空间的边界条件下，并且分段线性校正函数被线性地减少为零或近似为零， 不依赖于设备的色彩空间可以采用不同的边界条件或中性轴。 通过使分段线性校正函数线性地减少到零或近似为零，对一个颜色区域的校正平滑地减少并且混合到其他颜色区域中，从而基本上防止由于校正引入的伪像或图像损坏。
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10.发明授权Method and apparatus for characterizing and correcting for hue shifts in saturated colors 失效用于表征和校正饱和色彩色调偏移的方法和装置公开(公告)号：US07705857B2
公开(公告)日：2010-04-27
申请号：US11950826
申请日：2007-12-05
申请人： Christopher J. Edge
发明人： Christopher J. Edge
CPC分类号： H04N1/6075
摘要： A method for correcting for hue shifts includes parameterizing the conversion of long-medium-short (LMS) spectral sensitivities of the human eye to a human observer function, and applying a non-linear transformation between the LMS and human observer function in order to correct for the hue shifts. A system for correcting for hue shifts is also provided. The system includes a controller for parameterizing the conversion of LMS spectral sensitivities of the human eye to a human observer function and applying a non-linear transformation between the LMS and human observer function in order to correct for the hue shifts in the image. The system can also include an output device for presenting the hue corrected image.
摘要翻译： 用于校正色调偏移的方法包括将人眼的长中短（LMS）光谱灵敏度的转换参数化为人观察者功能，以及在LMS和人类观察者功能之间应用非线性变换，以便校正 为了色调转换。 还提供了用于校正色相偏移的系统。 该系统包括用于将人眼的LMS光谱灵敏度的转换参数化为人类观察者功能的控制器，并且在LMS和人类观察者功能之间应用非线性变换，以便校正图像中的色相偏移。 该系统还可以包括用于呈现色相校正图像的输出装置。
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