公开(公告)号：US20100182649A1

公开(公告)日：2010-07-22

申请号：US12356897

申请日：2009-01-21

申请人： Vishal Monga ,  Shen-Ge Wang ,  Raja Bala

发明人： Vishal Monga ,  Shen-Ge Wang ,  Raja Bala

IPC分类号： H04N1/405

CPC分类号： H04N1/6033 ,  H04N1/4078

摘要： A model-based halftone independent method for characterizing a printer equipped with a plural of halftone screens comprises: printing a target set of basic patches comprised of a fundamental binary pattern independent of a halftone screen; measuring true color printer response from the target set; modeling a halftone independent characterization of the printer with the mathematical transformation using the measured response; modeling a first halftone dependent characterization of the printer with the mathematical transformer to generate a first predicted result using a selected halftone screen; comparing a measured response of the printer using the halftone screen with the predicted result to define a correction factor corresponding to the halftone screen; and modeling a halftone dependent characterization of the printer using a predicted response of the fundamental binary pattern and the correction factor.

摘要翻译： 用于表征配备有多个半色调网版的打印机的基于模型的半色调独立方法包括：打印由基本二进制图案独立于半色调屏幕组成的基本色块的目标集合; 测量来自目标组的真彩打印机响应; 使用测量响应的数学变换建模打印机的半色调独立表征; 使用数学变压器对打印机的第一半色调依赖特征进行建模，以使用所选择的半色调屏幕产生第一预测结果; 将使用半色调屏幕的打印机的测量响应与预测结果进行比较，以定义对应于半色调屏幕的校正因子; 以及使用基本二进制模式和校正因子的预测响应对打印机的半色调依赖特征进行建模。

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。

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。

公开(公告)号：US20080218802A1

公开(公告)日：2008-09-11

申请号：US11716283

申请日：2007-03-09

申请人： Vishal Monga ,  Raja Bala

发明人： Vishal Monga ,  Raja Bala

IPC分类号： G06K15/00

CPC分类号： H04N1/6019

摘要： A device calibration method based on two-dimensional calibration transform that allows complete control of two-dimensional planes in the three-dimensional CMY (Cyan, Magenta, and Yellow) cube. Two-dimensional planes can be identified in the three-dimensional CMY cube as a primary plane and projected onto two-dimensional calibration lookup tables (LUTs) for C, M, and Y. The LUTs are filled with CMY colorant values that will maintain a fixed color (e.g. CIELAB) response within the chosen primary planes. There are three possible realizations depending upon which primary diagonal CMY plane is chosen. This technique can be used to calibrate an engine over time and to bring two or more engines to the same desired state.

摘要翻译： 基于二维校准变换的装置校准方法，其允许完全控制三维CMY（青色，品红色和黄色）立方体中的二维平面。 可以将三维CMY立方体中的二维平面识别为主平面并且投影到用于C，M和Y的二维校准查找表（LUT）上。LUT用CMY着色剂值填充，其将保持 所选主平面内的固定颜色（如CIELAB）响应。 根据哪个主对角CMY平面被选择，有三种可能的实现。 这种技术可用于随时间校准发动机，并使两个或更多个发动机达到相同的期望状态。

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.

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。

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。

公开(公告)号：US20070177231A1

公开(公告)日：2007-08-02

申请号：US11343656

申请日：2006-01-31

申请人： Shen-ge Wang ,  Raja Bala ,  Vishal Monga

发明人： Shen-ge Wang ,  Raja Bala ,  Vishal Monga

IPC分类号： H04N1/46

CPC分类号： H04N1/4078 ,  H04N1/40006

摘要： A method for compensating for color drift in a printer includes determining a first true tone response curve for a color channel when said printer is in a first state. A first estimated tone response curve for the color channel is also determined when said printer is in the first state. A second estimated tone response curve for the color channel is determined when the printer is in a second, color-drifted state relative to the first state. A second true tone response curve for the color channel is mathematically predicted using the first true tone response curve, the first estimated tone response curve, and the second estimated tone response curve. The first and second estimated tone response curves are estimated using a 2×2 printer model. A printing apparatus includes an image processing unit for implementing the color-drift correction process.

摘要翻译： 用于补偿打印机中的颜色漂移的方法包括当所述打印机处于第一状态时，确定用于颜色通道的第一真实色调响应曲线。 当所述打印机处于第一状态时，还确定色彩通道的第一估计色调响应曲线。 当打印机处于相对于第一状态的第二颜色漂移状态时，确定用于颜色通道的第二估计色调响应曲线。 使用第一真实色调响应曲线，第一估计色调响应曲线和第二估计色调响应曲线来数学地预测用于色彩通道的第二真正色调响应曲线。 使用2x2打印机模型来估计第一和第二估计音响应曲线。 打印装置包括用于实现色差校正处理的图像处理单元。

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。

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。