公开(公告)号：US20100188672A1

公开(公告)日：2010-07-29

申请号：US12359649

申请日：2009-01-26

申请人： Edgar Bernal ,  Robert P. Loce ,  Raja Bala

发明人： Edgar Bernal ,  Robert P. Loce ,  Raja Bala

IPC分类号： G06F15/00

CPC分类号： H04N1/60 ,  H04N1/409

摘要： An image processing apparatus, program product, and method determine an achievable gamut achievable by the imaging engine or engines for all spatial locations of an output image, or all utilized print engines. A reference gamut is calculated which is any gamut containing the achievable gamut. A gamut mapping is used to map gamuts from the mean gamut to the achievable gamut, and a set of transformations is calculated for each of a set of input colors to a set of target colors selected from colors in the achievable gamut. Values for a received digital image are transformed for each image pixel or clusters of pixels based on the calculated set of transformations. Output images are generated based on the transformed values.

摘要翻译： 图像处理装置，程序产品和方法确定由输出图像或所有使用的打印引擎的所有空间位置的成像引擎或引擎可实现的可实现色域。 计算参考色域，其中包含可实现色域的任何色域。 色域映射用于将色域从均匀色域映射到可实现色域，并且将一组输入颜色中的每一个计算为从可实现色域中的颜色中选择的一组目标颜色的一组变换。 基于所计算的变换集合，针对每个图像像素或像素簇变换接收数字图像的值。 基于变换后的值生成输出图像。

公开(公告)号：US07277196B2

公开(公告)日：2007-10-02

申请号：US10342873

申请日：2003-01-15

申请人： Jean-Pierre R. M. Van de Capelle ,  Lalit K. Mestha ,  Robert P. Loce ,  Raja Bala ,  Martin S. Maltz ,  Peter A. Crean

发明人： Jean-Pierre R. M. Van de Capelle ,  Lalit K. Mestha ,  Robert P. Loce ,  Raja Bala ,  Martin S. Maltz ,  Peter A. Crean

IPC分类号： G06F15/00

CPC分类号： H04N1/4078 ,  H04N1/6033

摘要： A system and method for printer control and color balance calibration. The system and method address the image quality problems of print engine instability, low quality of color balance and contouring from the calibration. The method includes defining combinations of colorants, such as inks or toners that will be used to print images, defining a desired response for the combinations that are to be used and, in real time, iteratively printing CMY halftone color patches, measuring the printed patches via an in situ sensor and iteratively performing color-balance calibration based on the measurements, accumulating corrections until the measurements are within a predetermined proximity of the desired response. The calibration is performed on the halftones while they are in a high quantization resolution form.

摘要翻译： 一种用于打印机控制和色平衡校准的系统和方法。 该系统和方法解决了打印引擎不稳定的图像质量问题，色彩平衡质量差和校准轮廓。 该方法包括定义着色剂的组合，例如将用于打印图像的油墨或调色剂，为要使用的组合定义期望的响应，并且实时迭代地打印CMY半色调色块，测量印刷的贴片 通过原位传感器并且基于测量迭代地执行色平衡校准，累积校正直到测量值在所需响应的预定接近度内。 校准在半色调上进行，而它们处于高量化分辨率形式。

公开(公告)号：US08064100B2

公开(公告)日：2011-11-22

申请号：US12329082

申请日：2008-12-05

申请人： Karen M. Braun ,  Raja Bala ,  Robert P. Loce

发明人： Karen M. Braun ,  Raja Bala ,  Robert P. Loce

IPC分类号： H04N1/44 ,  H04N1/52 ,  H04N1/56 ,  G06K15/02 ,  B41M3/10 ,  G07D7/12

CPC分类号： H04N1/32309 ,  H04N1/32352 ,  H04N2201/327 ,  H04N2201/3271 ,  Y10S283/902

摘要： A system is employed to reveal a watermark in a document. A watermark generator is utilized to select the placement and at least one colorant combination of an image and at least one colorant combination for a watermark on a document, where the at least one colorant combination of the image and the watermark form a metameric pair. A printing system receives data from the watermark generator and places the image and the watermark on the document. A decoder comprising a narrow band illumination element is selected or tuned to a wavelength corresponding to the colorant combinations utilized by the printing system to reveal the watermark placed thereon.

摘要翻译： 采用系统在文档中显示水印。 使用水印生成器来选择图像的至少一种着色剂组合和用于文档上的水印的至少一种着色剂组合，其中图像和水印的至少一种着色剂组合形成同色异体对。 打印系统从水印生成器接收数据，并将图像和水印放置在文档上。 包括窄带照明元件的解码器被选择或调谐到与由打印系统使用的着色剂组合相对应的波长以显示其上放置的水印。

公开(公告)号：US07864364B2

公开(公告)日：2011-01-04

申请号：US11199692

申请日：2005-08-09

申请人： Yeqing Zhang ,  Robert P. Loce ,  Raja Bala

发明人： Yeqing Zhang ,  Robert P. Loce ,  Raja Bala

IPC分类号： G03F3/08 ,  G06F15/00

CPC分类号： H04N1/6027

摘要： A color transformation method which accounts for colorant interactions includes establishing a plurality of tone reproduction curves (TRCs), for one or more of the color separations forming a digital image. Each TRC accounts for colorant interactions between a primary colorant with which the first color separation is to be rendered and at least one secondary colorant with which at least a second of the plurality of color separations is to be rendered. The TRCs include input values and their corresponding modified input values. In a given TRC, the input values of the second and optionally other color separations are fixed. For a pixel of the digital image having a given input values for the first and second color separation one or more of the TRCs are selected which bound the fixed input value for the second color separation and a modified input value is determined therefrom.

摘要翻译： 考虑着色剂相互作用的颜色变换方法包括为形成数字图像的一个或多个分色建立多个色调再现曲线（TRC）。 每个TRC考虑到将要渲染第一颜色分离的主要着色剂与至少一种次要着色剂之间的着色剂相互作用，至少一个次要着色剂将使多个分色中的至少一个分色进行渲染。 TRC包括输入值及其对应的修改输入值。 在给定的TRC中，第二个和任选的其他分色的输入值是固定的。 对于具有用于第一和第二颜色分离的给定输入值的数字图像的像素，选择一个或多个TRC，其限定用于第二颜色分离的固定输入值，并且从其确定修改的输入值。

公开(公告)号：US20100142003A1

公开(公告)日：2010-06-10

申请号：US12329082

申请日：2008-12-05

申请人： Karen M. Braun ,  Raja Bala ,  Robert P. Loce

发明人： Karen M. Braun ,  Raja Bala ,  Robert P. Loce

IPC分类号： G06K15/02 ,  H04N1/405 ,  G06K9/00

CPC分类号： H04N1/32309 ,  H04N1/32352 ,  H04N2201/327 ,  H04N2201/3271 ,  Y10S283/902

摘要： A system is employed to reveal a watermark in a document. A watermark generator is utilized to select the placement and at least one colorant combination of an image and at least one colorant combination for a watermark on a document, where the at least one colorant combination of the image and the watermark form a metameric pair. A printing system receives data from the watermark generator and places the image and the watermark on the document. A decoder comprising a narrow band illumination element is selected or tuned to a wavelength corresponding to the colorant combinations utilized by the printing system to reveal the watermark placed thereon.

摘要翻译： 采用系统在文档中显示水印。 使用水印生成器来选择图像的至少一种着色剂组合和用于文档上的水印的至少一种着色剂组合，其中图像和水印的至少一种着色剂组合形成同色异体对。 打印系统从水印生成器接收数据，并将图像和水印放置在文档上。 包括窄带照明元件的解码器被选择或调谐到与由打印系统使用的着色剂组合相对应的波长以显示其上放置的水印。

公开(公告)号：US20080137149A1

公开(公告)日：2008-06-12

申请号：US11634657

申请日：2006-12-06

申请人： Robert P. Loce ,  Raja Bala ,  Karen M. Braun

发明人： Robert P. Loce ,  Raja Bala ,  Karen M. Braun

IPC分类号： G06K15/00

CPC分类号： H04N1/32309 ,  H04N1/32299

摘要： Extended colorant sets are used to hide data or provide a watermark in printed images. Extended set colorants are colorants other than, and in addition to, the standard or common subtractive primary colorants: cyan, magenta, yellow and/or black. Where the extended colorant set supports a plurality of colorant recipes for rendering a given color, watermark data is used to select a colorant recipe from the plurality. As the watermark data to be encoded in the image changes state with image position, alternate colorant recipes or colorant selection functions are selected. The image is rendered based on the alternate colorant recipe selections. Watermark information is encoded in the colorant recipe or colorant selection function selection. Use of the extended colorant sets allows information to be encoded even in portions of an image having colors that do not include a neutral component.

摘要翻译： 扩展着色剂集合用于隐藏数据或在打印图像中提供水印。 扩展的定色着色剂是除了标准或普通的减色原色色剂之外的除了和附加的着色剂：青色，品红色，黄色和/或黑色。 在延伸着色剂组支持用于渲染给定颜色的多个着色剂配方的情况下，使用水印数据从多个中选择着色剂配方。 当图像中要编码的水印数据用图像位置改变状态时，选择着色剂配方或着色剂选择功能。 基于备选着色剂配方选择渲染图像。 水印信息在着色剂配方或着色剂选择功能选择中进行编码。 使用扩展着色剂组允许即使在具有不包括中性成分的颜色的图像的部分中也可以对信息进行编码。

公开(公告)号：US07764403B2

公开(公告)日：2010-07-27

申请号：US11634657

申请日：2006-12-06

申请人： Robert P. Loce ,  Raja Bala ,  Karen M. Braun

发明人： Robert P. Loce ,  Raja Bala ,  Karen M. Braun

IPC分类号： H04N1/40 ,  H04N1/60

CPC分类号： H04N1/32309 ,  H04N1/32299

摘要： Extended colorant sets are used to hide data or provide a watermark in printed images. Extended set colorants are colorants other than, and in addition to, the standard or common subtractive primary colorants: cyan, magenta, yellow and/or black. Where the extended colorant set supports a plurality of colorant recipes for rendering a given color, watermark data is used to select a colorant recipe from the plurality. As the watermark data to be encoded in the image changes state with image position, alternate colorant recipes or colorant selection functions are selected. The image is rendered based on the alternate colorant recipe selections. Watermark information is encoded in the colorant recipe or colorant selection function selection. Use of the extended colorant sets allows information to be encoded even in portions of an image having colors that do not include a neutral component.

摘要翻译： 扩展着色剂集合用于隐藏数据或在打印图像中提供水印。 扩展的定色着色剂是除了标准或普通的减色原色着色剂之外的除了以外的着色剂：青色，品红色，黄色和/或黑色。 在延伸着色剂组支持用于渲染给定颜色的多个着色剂配方的情况下，使用水印数据从多个中选择着色剂配方。 当图像中要编码的水印数据用图像位置改变状态时，选择着色剂配方或着色剂选择功能。 基于备选着色剂配方选择渲染图像。 水印信息在着色剂配方或着色剂选择功能选择中进行编码。 使用扩展着色剂组允许即使在具有不包括中性成分的颜色的图像的部分中也可以对信息进行编码。

公开(公告)号：US07486416B2

公开(公告)日：2009-02-03

申请号：US11143818

申请日：2005-06-02

申请人： Edul N. Dalal ,  Wencheng Wu ,  Robert P. Loce ,  Raja Bala ,  Yeqing Zhang ,  Norman W. Zeck

发明人： Edul N. Dalal ,  Wencheng Wu ,  Robert P. Loce ,  Raja Bala ,  Yeqing Zhang ,  Norman W. Zeck

IPC分类号： H04N1/60 ,  H04N1/04 ,  G03F3/08 ,  G06K15/00 ,  G06K9/00

CPC分类号： H04N1/6038 ,  H04N1/6041

摘要： Spatially dependent colorant interaction effects are identified and isolated from other aspects of spatially dependent colorant appearance nonuniformities. A decorrelating function for compensating for the identified spatially dependent colorant interaction effects is determined. Spatially dependent single colorant compensating functions for compensating for the other aspects of the spatially dependent colorant appearance nonuniformities may also be determined. Image data is processed through the decorrelating function, thereby generating colorant values that are compensated for spatially dependent colorant interaction effects. Optionally, image data is also processed through the spatially dependent single colorant compensating functions, thereby generating colorant values that are compensated for both aspects of colorant appearance nonuniformities. The two kinds of compensating functions may be determined, calibrated and/or stored at different spatial and temporal frequencies or resolutions. One or both of the compensating functions may be employed to maintain consistency across a plurality of rendering devices (e.g., marking engines).

摘要翻译： 从空间依赖的着色剂外观不均匀性的其他方面鉴定和分离空间依赖性着色剂相互作用效应。 确定用于补偿所识别的空间依赖着色剂相互作用效应的去相关函数。 还可以确定用于补偿空间依赖着色剂外观不均匀性的其它方面的空间依赖性单色剂补偿功能。 图像数据通过去相关功能进行处理，从而产生对空间依赖的着色剂相互作用效应进行补偿的着色剂值。 可选地，还通过空间依赖的单一着色剂补偿功能来处理图像数据，由此产生着色剂值，其对着色剂外观不均匀性的两个方面进行补偿。 可以在不同的空间和时间频率或分辨率下确定，校准和/或存储两种补偿功能。 可以采用一种或两种补偿功能来保持多个渲染设备（例如，标记引擎）之间的一致性。

公开(公告)号：US07215817B2

公开(公告)日：2007-05-08

申请号：US10644342

申请日：2003-08-20

申请人： Ricardo L. de Queiroz ,  Robert P. Loce ,  Karen M. Braun ,  Raja Bala

发明人： Ricardo L. de Queiroz ,  Robert P. Loce ,  Karen M. Braun ,  Raja Bala

IPC分类号： G06K9/36 ,  G06K9/00

CPC分类号： G06K9/36 ,  H04N1/32309 ,  H04N1/32352

摘要： What is disclosed is a decoding method for retrieving information bits encoded in a printed image comprising the steps of first receiving an input electronic image as a scanned version of the printed image. A region of interest in the image is then extracted and, for that region, an amount of K colorant present, denoted KH; is obtained. Further, a color value is generated therefrom and the GCR used for encoding that region is determined using KH and the obtained color value. Encoded information bits are retrieved therefrom based on the determined GCR. The estimated KH is preferably evaluated conditional to a capacity signal KL and a luminance signal L. From the obtained data, values of KH, KL, and L, are derived wherein KH is estimated from a high resolution scan, and KL and L are estimated from a down-scaled image, respectively. The capacity signal KL and the luminance signal L are derived from the obtained color value. Further, the capacity signal, KL is derived by first applying a suitable operator S to reduce the image from scanner resolution to the watermark resolution and then converting the obtained color values to CMY estimates such that KL=min(C,M,Y) Alternatively, K-capacity is derived from the amount, KL, y, comprises first converting the obtained color values to CMY estimates and applying a suitable operator S to reduce the image from scanner resolution to the watermark resolution such that KL=min(S(C),S(M),S(Y)); wherein L is described by a linear combination of scan signals RGB, such that L=k1S(R)+k2S(G)+k3S(B). The value of KH is determined by first converting the obtained color values to CMY estimates. The estimates determine K-colorant amount at each pixel such that: K=min(C,M,Y). A suitable operator S is applied to reduce the image from scanner resolution to the watermark resolution.

公开(公告)号：US07070252B2

公开(公告)日：2006-07-04

申请号：US10644472

申请日：2003-08-20

申请人： Ricardo L. de Queiroz ,  Robert P. Loce ,  Karen M. Braun ,  Raja Bala

发明人： Ricardo L. de Queiroz ,  Robert P. Loce ,  Karen M. Braun ,  Raja Bala

IPC分类号： B41J2/205 ,  G06F15/00

CPC分类号： B41J2/205 ,  H04N1/32144 ,  H04N1/32251 ,  H04N1/32267 ,  H04N1/32309

摘要： What is disclosed is a method for digital watermarking in a calibrated printing path and comprises: first receiving a pixel possessing color values from an input image; receiving a plurality of information bits to be encoded at a corresponding pixel in an output image. Then, one of at least two different GCR functions are selected where the selection is based on the state of the received information bits. The number of GCR functions to be selected from is dependent on the number of possible states of the information bits intended to be encoded at each image pixel and preferably equals the number of states of the information bits intended to be encoded at each image pixel such that the GCR spatially varies across the output image. Further, at least two GCR functions are optimized to carry information and information bits intended to be encoded within the output image are represented with a tag. CMYK values are then generated using the selected GCR function and the color values. These CMYK values are assigned to a corresponding pixel in the output image. The information bits to be encoded at a given pixel indicate the type of object to which that pixel belongs, such as: graphics, picture, text, line art, etc. The output image, when printed, exhibits the property that substantially similar colors occurring at different spatial locations in the input image are produced with substantially different CMYK combinations in the print. Preferably, a parameterized function is used for the GCR function and the encoded state sets the parameter of the function. Information bits should be redundantly encoded throughout the output image. Regions that cannot be encoded by GCR information have to be compensated for. A reference mark is applied on the output image to indicate the starting point and order of the information sequence.

摘要翻译： 所公开的是在校准打印路径中进行数字水印的方法，包括：首先从输入图像接收具有颜色值的像素; 在输出图像中的相应像素处接收要编码的多个信息比特。 然后，选择至少两个不同的GCR功能中的一个，其中选择基于所接收的信息比特的状态。 要选择的GCR功能的数量取决于要在每个图像像素处被编码的信息比特的可能状态的数量，并且优选地等于要在每个图像像素处编码的信息比特的状态数，使得 GCR在输出图像之间空间变化。 此外，至少两个GCR功能被优化以携带信息，并且用标签表示旨在在输出图像内编码的信息位。 然后使用所选的GCR功能和颜色值生成CMYK值。 这些CMYK值被分配给输出图像中的相应像素。 在给定像素处要编码的信息位指示像素所属于的对象的类型，例如：图形，图片，文本，线条等。输出图像在打印时表现出基本相似的颜色出现的属性 在输入图像中的不同空间位置处，在打印中以基本不同的CMYK组合产生。 优选地，GCR函数使用参数化函数，编码状态设置函数的参数。 信息位应在整个输出图像中进行冗余编码。 不能由GCR信息编码的区域必须得到补偿。 在输出图像上应用参考标记来指示信息序列的起点和顺序。