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61. 发明授权

US07869087B2 Color printer characterization or calibration to correct for spatial non-uniformity 有权
标题翻译：彩色打印机表征或校准以校正空间不均匀性
公开(公告)号：US07869087B2
公开(公告)日：2011-01-11
申请号：US11694960
申请日：2007-03-31
申请人： Shen-ge Wang , Raja Bala , Willey Huaili Wang
发明人： Shen-ge Wang , Raja Bala , Willey Huaili Wang
IPC分类号： G06F15/00 , G03F3/08
CPC分类号： G06K15/02 , B41J29/393 , G06K15/027 , H04N1/4015 , H04N1/6033
摘要： Methods and systems are presented for calibrating or characterizing a color printer or determining the color response of a color printer to combat spatial non-uniformity, in which color patches are printed on a test page according to an input matrix of input color in a printer-dependent-color space and the test page is measured to provide a corresponding output matrix of output color in a printer-independent-color space. Initial forward and inverse color transforms between the input and the output colors are generated based on the input and the output matrices. The output values are mapped to the input color space based on the initial inverse transform to form a feedback matrix, and spatial non-uniformities present in the printed test page are estimated according to noise values derived from the input matrix and the feedback matrix. The input matrix is modified according to the estimated spatial non-uniformity to form a modified input matrix of input color, and final forward and inverse transforms are generated for the color printer according to the modified input matrix and the output matrix.
摘要翻译：呈现用于校准或表征彩色打印机的方法和系统，或者确定彩色打印机的颜色响应以对抗空间不均匀性，其中根据打印机的输入颜色的输入矩阵将色块打印在测试页上。测量依赖颜色空间并测试测试页面，以在独立于打印机的颜色空间中提供输出颜色的相应输出矩阵。基于输入和输出矩阵生成输入和输出颜色之间的初始正向和反向颜色变换。基于初始反变换将输出值映射到输入颜色空间以形成反馈矩阵，并且根据从输入矩阵和反馈矩阵导出的噪声值来估计印刷测试页面中存在的空间非均匀性。输入矩阵根据估计的空间不均匀性进行修改，形成输入颜色的修改输入矩阵，根据修改的输入矩阵和输出矩阵，为彩色打印机生成最终的正向和反向变换。

62. 发明申请

US20090296156A1 Pitch based high quantization halftone dot linearization for rendering high quality color images 有权
标题翻译：基于间距的高量化半色调点线性化，用于渲染高质量彩色图像
公开(公告)号：US20090296156A1
公开(公告)日：2009-12-03
申请号：US12472689
申请日：2009-05-27
申请人： Lalit Keshav Mestha , Richard Leighton Howe , Raja Bala
发明人： Lalit Keshav Mestha , Richard Leighton Howe , Raja Bala
IPC分类号： H04N1/405
CPC分类号： G06K15/00 , H04N1/52 , H04N1/6027 , H04N1/6033
摘要： A device, system, and method for reducing the pitch-to-pitch variation of color using pitch-based linearization of halftone screens are presented. A selection of images is printed at different pitches, and each image is measured and tracked with its pitch. Pitch-based TRCs are constructed using patches, which may be scheduled during print run or during machine diagnostic process and halftone dots are constructed and uploaded in the image path for each pitch. The updated dots are then used to produce a linearized halftone image for transfer to a print surface which results in improved color balance.
摘要翻译：提出了使用基于色调的网版线性化来减少颜色间距变化的装置，系统和方法。以不同的间距打印图像的选择，并且每个图像被测量并用其间距进行跟踪。基于间距的TRC使用补丁构建，其可以在打印运行期间或在机器诊断过程期间被调度，并且在每个间距的图像路径中构造并上传半色调点。然后更新的点用于产生线性化的半色调图像以转印到打印表面，这导致改善的色彩平衡。

63. 发明申请

US20080302263A1 INFRARED ENCODING OF SECURITY ELEMENTS USING STANDARD XEROGRAPHIC MATERIALS 有权
标题翻译：使用标准XEROGRAPHIC材料的安全元素的红外编码
公开(公告)号：US20080302263A1
公开(公告)日：2008-12-11
申请号：US11758344
申请日：2007-06-05
申请人： Reiner Eschbach , Raja Bala , Martin S. Maltz
发明人： Reiner Eschbach , Raja Bala , Martin S. Maltz
IPC分类号： B41F31/00 , G01J3/00
CPC分类号： B41M3/144 , B42D25/382 , C09D11/037 , H04N1/32149 , H04N2201/327 , H04N2201/3271 , Y10T428/24802
摘要： The teachings as provided herein relate to a watermark embedded in an image that has the property of being relatively indecipherable under normal light, and yet decipherable under infrared illumination when viewed by a suitable infrared sensitive device. This infrared mark entails, a substrate reflective to infrared radiation, and a first colorant mixture and second colorant mixture printed as an image upon the substrate. The first colorant mixture layer in connection with the substrate has a property of strongly reflecting infrared illumination, as well as a property of low contrast under normal illumination against a second colorant mixture as printed in close spatial proximity to the first colorant mixture pattern, such that the resultant image rendered substrate suitably exposed to an infrared illumination, will yield a discernable image evident as a infrared mark to a suitable infrared sensitive device.
摘要翻译：本文提供的教导涉及嵌入在图像中的水印，其具有在正常光线下相对不可解译的性质，并且在由合适的红外敏感装置观看时在红外照明下可解码。该红外线标记需要反射红外辐射的基板，以及作为图像印刷在基板上的第一着色剂混合物和第二着色剂混合物。与基底相关的第一着色剂混合物层具有强烈反射红外照明的性质，以及在正常照射下对第二着色剂混合物的低对比度的性质，其与第一着色剂混合物图案紧密相邻地印刷，使得适当地暴露于红外照明的所得到的图像渲染基板将产生作为适合的红外敏感装置的红外标记显而易见的可识别图像。

64. 发明授权

US07352491B2 System and method for selecting the best set of devices for rendering color documents 有权
公开(公告)号：US07352491B2
公开(公告)日：2008-04-01
申请号：US10641205
申请日：2003-08-14
申请人： Raja Bala , Gaurav Sharma , Robert J. Rolleston
发明人： Raja Bala , Gaurav Sharma , Robert J. Rolleston
IPC分类号： H04N1/40
CPC分类号： H04N1/603 , H04N1/6058
摘要： The system for selecting a best device for rendering a color document involves first determining the types of color data included in the color document to be printed. Once the type of color data has been determined, the color characteristics are matched against the strengths of the available output devices to obtain a list of devices best suited for this particular color print job. At least one device from the list of best devices is selected and the color document is rendered onto the selected device. Preferably, the types of color data involved are determined by the mix of defined colorimetry and undefined colorimetry in the color document. Alternatively, the types of color data are determined by analyzing the colorspaces in the document (i.e., RGB, CMYK, LAB, XYZ, etc.), and the embedded profiles, if any, in the document (e.g., sRGB, SWOPCMYK, Euroscale). In the instance wherein a number of devices match the criteria for selection, only those devices which honor embedded color profiles are selected for documents containing embedded profiles. Alternatively, only those devices are selected that produce a consistent rendering across multiple color spaces and profiles for documents with a mix of color spaces and profiles. Selecting the best device may also depend on whether the type of print job is considered to be Job-Balancing or Job-Splitting. With Job-Balancing, at least one of the metrics is used: (i) Intersection Gamut Volume, (ii) Gamut Similarity, or (iii) Mismatch Between Document Colors and Intersection Gamut for device selection. With Job-Splitting, at least one of these metrics are used: (i) Individual Gamut Volume, or (ii) Mismatch Between Document Colors and Device Gamut. Colorimetric definition of the selected colors can be retrieved from either an embedded source profile or by default and mapping the colors to the output gamut.

65. 发明申请

US20070262579A1 SUBSTRATE FLUORESCENCE PATTERN MASK FOR EMBEDDING INFORMATION IN PRINTED DOCUMENTS 有权
标题翻译：印刷文件中嵌入信息的基板荧光图案
公开(公告)号：US20070262579A1
公开(公告)日：2007-11-15
申请号：US11382869
申请日：2006-05-11
申请人： Raja Bala , Reiner Eschbach
发明人： Raja Bala , Reiner Eschbach
IPC分类号： B42D15/00
CPC分类号： B41M3/144 , B42D25/29 , B42D25/333 , B42D25/387
摘要： The teachings as provided herein relate to a watermark embedded in an image that has the property of being relatively indecipherable under normal light, and yet decipherable under UV light. This fluorescent mark comprises a substrate containing optical brightening agents, and a first colorant mixture pattern printed as an image upon the substrate. The colorant mixture pattern layer has as characteristics a property of strongly suppressing substrate fluorescence, as well as a property of low contrast under normal illumination against the substrate or a second colorant mixture pattern printed in close spatial proximity to the first colorant mixture pattern. The second colorant mixture pattern having a property of providing a differing level of substrate fluorescence suppression from the first such that the resultant image rendered substrate suitably exposed to an ultra-violet light source, will yield a discernable image evident as a fluorescent mark.
摘要翻译：本文提供的教导涉及嵌入在图像中的水印，其具有在正常光线下相对不可解译的性质，并且在UV光下可解码。该荧光标记包括含有荧光增白剂的基材和在基材上作为图像印刷的第一着色剂混合物图案。着色剂混合物图案层具有强烈抑制底物荧光的特性，以及在对衬底的正常照射下的低对比度的性质或在与第一着色剂混合物图案紧密地空间接近印刷的第二着色剂混合物图案。第二着色剂混合物图案具有从第一着色剂混合物图案提供不同程度的底物荧光抑制，使得所得到的图像转印底物适当地暴露于紫外光源，将产生作为荧光标记显而易见的可辨别图像。

66. 发明授权

US07295703B2 Method for scanner characterization for color measurement of printed media having four or more colorants 失效
标题翻译：用于具有四种或更多种着色剂的印刷介质的颜色测量的扫描器表征方法
公开(公告)号：US07295703B2
公开(公告)日：2007-11-13
申请号：US10871114
申请日：2004-06-18
申请人： Raja Bala , Judith Stinehour , Gaurav Sharma
发明人： Raja Bala , Judith Stinehour , Gaurav Sharma
IPC分类号： G06K9/00 , G06K1/00 , H04N1/46
CPC分类号： H04N1/4078 , H04N1/6022
摘要： The present invention is directed to a method and apparatus for the improved characterization of an image scanner or similar image input terminal so as to enable the device to be employed in the measurement and analysis of color images. The invention uses a family of input device characterization targets, each varying in primary colorants and at a fixed level of black (K) colorant. A corresponding family of input device characterizations is derived, one for each level of K, and the final transformation is prepared such that the characterization includes K as an additional input—thereby improving the characterization and accuracy of the input device.
摘要翻译：本发明涉及一种用于改进图像扫描仪或类似图像输入端子的表征的方法和装置，以便能够将该装置用于彩色图像的测量和分析。本发明使用一系列输入设备表征目标，每个变色原色和在黑（K）着色剂的固定水平。导出相应的输入设备特性系列，每个级别为K一个，并且准备最终变换，使得表征包括K作为附加输入，从而提高输入设备的表征和精度。

67. 发明申请

US20070035749A1 Color compensation of images 失效
标题翻译：图像颜色补偿
公开(公告)号：US20070035749A1
公开(公告)日：2007-02-15
申请号：US11200227
申请日：2005-08-09
申请人： Yeqing Zhang , Robert Loce , Raja Bala
发明人： Yeqing Zhang , Robert Loce , Raja Bala
IPC分类号： G03F3/08 , G06F15/00
CPC分类号： H04N1/6016
摘要： A color correction method includes for each of a plurality of color separations of a digital image, establishing a tone reproduction curve in the form of a vector. The vector is a function of a plurality of basis vectors. The basis vectors account for colorant interactions between a primary colorant with which the 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 vector includes modified input values corresponding to input values for the color separation which vary, depending on the input values of at least the second color separation. For a pixel of interest in the digital image, a modified input value for the color separation which corresponds to the input value of the given color separation is identified from the vector.
摘要翻译：颜色校正方法包括数字图像的多个分色中的每一个，建立矢量形式的色调再现曲线。向量是多个基本向量的函数。基本向量涉及要与其进行分色的主要着色剂和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再现。矢量包括对应于颜色分离的输入值的修改的输入值，其根据至少第二颜色分离的输入值而变化。对于数字图像中感兴趣的像素，从向量中识别对应于给定颜色分离的输入值的颜色分离的修改输入值。

68. 发明授权

US06937253B2 Method for determining color space of an image 失效
标题翻译：用于确定图像的颜色空间的方法
公开(公告)号：US06937253B2
公开(公告)日：2005-08-30
申请号：US10733583
申请日：2003-12-11
申请人： Raja Bala
发明人： Raja Bala
IPC分类号： H04N1/60 , G09G5/02 , H04N1/46
CPC分类号： H04N1/60
摘要： A method for determining whether an input image is defined in accordance with a luminance-chrominance color space, includes receiving an input image in three dimensional color space, S1, S2 and S3, where S1 is an image value in the first dimension, S2 is an image value in the second dimension and S3 is an image value in the third dimension; extracting low and high extrema of S1 values in the image; obtaining deviation of S2 and S3 from a predefined neutral axis for all pixels in the image whose S1 value is either the low or the high extremum; testing a condition that certain of the deviations are within predetermined thresholds; and determining, if the condition holds true, that the image is in a luminance-chrominance color space.
摘要翻译：一种用于确定输入图像是否根据亮度色度色空间来定义的方法包括：在三维色彩空间S 1，S 2和S 3中接收输入图像，其中S 1是第一像素中的图像值尺寸，S 2是第二维中的图像值，S 3是第三维中的图像值; 提取图像中S 1值的低和高极值; 对于S 1值为低或高极值的图像中的所有像素，获得S 2和S 3与预定中性轴的偏差; 测试某些偏差在预定阈值内的条件; 以及如果所述条件成立，则确定所述图像在亮度 - 色度色彩空间中。

69. 发明申请

US20050036159A1 System and method for obtaining color consistency for a color print job across multiple output devices 有权
公开(公告)号：US20050036159A1
公开(公告)日：2005-02-17
申请号：US10640835
申请日：2003-08-14
申请人： Gaurav Sharma , Raja Bala , Robert Rolleston
发明人： Gaurav Sharma , Raja Bala , Robert Rolleston
IPC分类号： H04N1/60
CPC分类号： H04N1/6058 , H04N1/603
摘要： A method for maintaining color consistency in an environment of networked devices is disclosed. The method involves identifying a group of devices to which a job is intended to be rendered; obtaining color characteristics from devices in the identified group; modifying the job based on the obtained color characteristics; and rendering the job on one or more of the devices. More specifically, device controllers associated with each of the output devices are queried to obtain color characteristics specific to the associated output device. Preferably, the original job and the modified job employ device independent color descriptions. Modifications are computed by a transform determined by using the color characteristics of the output devices along with the content of the job itself. The method further comprises mapping colors in the original job to the output devices' common gamut, i.e., intersection of the gamuts of the individual printers wherein the color gamut of each device is obtained from a device characterization profile either by retrieving the gamut tag or by derivation using the characterization data in the profile. The color gamut of each device is computed with knowledge of the transforms that relate device independent color to device dependent color using a combination of device calibration and characterization information. Alternatively, transformations are determined dynamically based on the characteristics of the target group of output devices. From the individual color gamuts of the devices, a common intersection gamut is derived. The common intersection gamut derivation generally comprises an intersection of two three-dimensional volumes in color space. This may be performed geometrically by intersecting the surfaces representing the boundaries of the gamut volumes—which are typically chosen as triangles. Alternately, the intersection may be computed by generating a grid of points known to include all involved device gamuts. This is then mapped sequentially to each individual gamut in turn resulting in a set of points that lie within the common gamut to produce a connected gamut surface. Once the common intersection gamut is derived, the input job colors are mapped to this gamut. The optimal technique generally depends on the characteristics of the input job and the user's rendering intent. Final color correction employs a standard calorimetric transform for each output device that does not involve any gamut mapping.

70. 发明申请

US20050030560A1 Methods and systems for controlling out-of-gamut memory and index colors 有权
标题翻译：用于控制色域内存和索引颜色的方法和系统
公开(公告)号：US20050030560A1
公开(公告)日：2005-02-10
申请号：US10635381
申请日：2003-08-05
申请人： Martin Maltz , Raja Bala , Lalit Mestha
发明人： Martin Maltz , Raja Bala , Lalit Mestha
IPC分类号： H04N1/60
CPC分类号： H04N1/6058
摘要： Methods and systems in an image processing device for controlling colors that are located external to a gamut are disclosed. A plurality of color values can be automatically provided as input to said image processing device, wherein said image processing device is under a control of a particular dimensional order, typically a three-dimensional order, but alternatively can be a two-dimensional order. Next, an operation can be performed dynamically determining which color value among the plurality of color values has attained a gamut limit. Thereafter, the particular dimensional order can be automatically reduced, thereby providing improved control for colors that are located external to said gamut. The plurality of color values analyzed is generally associated with three colors—cyan, magenta, and yellow.
摘要翻译：公开了用于控制位于色域外部的颜色的图像处理装置中的方法和系统。可以将多个颜色值自动提供给所述图像处理装置的输入，其中所述图像处理装置处于特定尺寸顺序的控制下，通常为三维顺序，但是可替代地可以是二维顺序。接下来，可以动态地确定多个颜色值中的哪个颜色值已经达到色域限制的操作。此后，可以自动减小特定尺寸顺序，从而对位于所述色域外部的颜色提供改进的控制。分析的多个颜色值通常与三种颜色（青色，品红色和黄色）相关联。

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