公开(公告)号：US20090021587A1

公开(公告)日：2009-01-22

申请号：US11880052

申请日：2007-07-19

申请人： David Snyderman ,  Geoffrey John Woolfe ,  Raja Bala

发明人： David Snyderman ,  Geoffrey John Woolfe ,  Raja Bala

IPC分类号： H04N5/225

CPC分类号： H04N9/73 ,  G01J3/10 ,  G01J3/50 ,  G01J3/506 ,  G01J3/524 ,  G09G2320/0693 ,  H04N17/02

摘要： A computer program product and method for calibrating and characterizing a color display perform calibrating and characterizing steps. A light source is operated in order to emit light from one or more light emitters on the light source. A color capture device, e.g., a digital camera, is calibrated and characterized based on the emitted light. Then, color images are displayed on the color display and captured on the color capture device. The color display is calibrated and characterized based on the captured color images. Computer program instructions are recorded on the computer readable medium, and are executable by a processor, for performing the calibrating and characterizing steps. A method for generating a controlled light source includes displaying light source selections to a user and receiving a user light source selection. Selected light emitters produce a light output matching the user light source selection.

摘要翻译： 用于校准和表征彩色显示器的计算机程序产品和方法执行校准和表征步骤。 操作光源以便从光源上的一个或多个光发射器发射光。 基于发射的光来校准和表征彩色捕获装置，例如数字照相机。 然后，彩色图像被显示在彩色显示器上并捕获在彩色捕获装置上。 基于捕获的彩色图像校准和表征彩色显示。 计算机程序指令被记录在计算机可读介质上，并且可由处理器执行，用于执行校准和表征步骤。 用于产生受控光源的方法包括向用户显示光源选择并接收用户光源选择。 所选择的发光体产生与用户光源选择相匹配的光输出。

公开(公告)号：US20080239344A1

公开(公告)日：2008-10-02

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： G06K15/00

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。

公开(公告)号：US20080199785A1

公开(公告)日：2008-08-21

申请号：US11708313

申请日：2007-02-20

申请人： Raja Bala ,  Reiner Eschbach

发明人： Raja Bala ,  Reiner Eschbach

IPC分类号： G03F1/00

CPC分类号： B41M3/144 ,  B41M3/14

摘要： A method is provided for creation of a substrate fluorescence mask having background color(s), UV mark color(s), and distraction color(s), to be printed as an image on a substrate containing optical brightening agents. The method includes selecting one or more UV mark colors for the mask such that the UV mark colors exhibit low contrast against the background color(s) under normal illumination and high contrast against the background color(s) under UV illumination. One or more distraction colors are also selected, such that the distraction color(s) exhibit low contrast against the background color(s) under UV illumination and exhibit high contrast against the background color(s) under normal illumination. A distraction pattern, formed from one or more distraction colors, is also selected.

摘要翻译： 提供了一种用于产生具有背景颜色，UV标记颜色和分散颜色的衬底荧光掩模的方法，作为图像印刷在含有荧光增白剂的衬底上。 该方法包括为掩模选择一个或多个UV标记颜色，使得UV标记颜色在正常照明下对背景颜色显示低对比度，并且在UV照射下对背景颜色显示高对比度。 还选择一种或多种分散颜色，使得分散颜色在UV照射下表现出与背景颜色的低对比度，并且在正常照明下显示与背景颜色的高对比度。 还选择由一种或多种分散颜色形成的分散图案。

公开(公告)号：US20080068626A1

公开(公告)日：2008-03-20

申请号：US11522739

申请日：2006-09-18

申请人： Raja Bala ,  Michael Branciforte ,  Reiner Eschbach

发明人： Raja Bala ,  Michael Branciforte ,  Reiner Eschbach

IPC分类号： G03F3/08

CPC分类号： H04N1/6058

摘要： An image characterized by an original image gamut is received in an imaging device characterized by a device gamut. The original image gamut is enhanced to a first set of modified color values that occupy a greater fraction of the device gamut than the original image gamut. The modified color values of each pixel are mapped to new color values within the device gamut.

摘要翻译： 以原始图像色域为特征的图像被接收在以设备色域为特征的成像设备中。 原始图像色域被增强为占原始图像色域的设备色域的更大部分的第一组修改的颜色值。 每个像素的修改颜色值被映射到设备色域内的新颜色值。

公开(公告)号：US07328116B2

公开(公告)日：2008-02-05

申请号：US11119972

申请日：2005-05-02

申请人： Raja Bala ,  Reiner Eschbach ,  Gaurav Sharma

发明人： Raja Bala ,  Reiner Eschbach ,  Gaurav Sharma

IPC分类号： G01D18/00 ,  G01P21/00 ,  G01R35/00

CPC分类号： H04N17/04

摘要： A method is presented for deriving gamma for a display monitor that does not involve color matching tasks. The method includes displaying a test pattern to a user on the display monitor. The test pattern includes at least one of a pattern of alternating light and dark regions displayed to the user at different gamma correction levels, or a grayscale character string displayed to the user at different digital gray levels against a background of two known luminance levels. Input is received from the user as to at least one of a gamma correction level that results in the pattern of alternating light and dark regions having light and dark regions of perceived equal size, or a digital gray level for the grayscale character string that results in maximum legibility of the text string against the two known background luminance levels. Gamma is derived for the display monitor based upon the user input.

摘要翻译： 提出了一种用于导出不涉及颜色匹配任务的显示监视器的伽马的方法。 该方法包括在显示监视器上向用户显示测试图案。 测试图案包括以不同的伽马校正水平显示给用户的交替光和暗区域的模式中的至少一个，或者以两个已知亮度水平的背景在不同的数字灰度级显示给用户的灰度字符串中的至少一个。 从用户接收关于导致具有感知相同大小的亮和暗区域的交替的光和暗区域的图案的灰度校正水平或用于灰度字符串的数字灰度级中的至少一个的输入，其导致 文本串相对于两个已知背景亮度级别的最大可读性。 基于用户输入，导出用于显示监视器的伽马。

公开(公告)号：US07312799B2

公开(公告)日：2007-12-25

申请号：US11102423

申请日：2005-04-08

申请人： R Victor Klassen ,  Raja Bala

发明人： R Victor Klassen ,  Raja Bala

IPC分类号： G09G5/00 ,  G06K9/00 ,  G03F3/08 ,  H04N1/46 ,  H04N5/57 ,  G09G5/10

CPC分类号： G09G5/02 ,  G09G2320/0276 ,  G09G2320/0673

摘要： Provided herein are teachings directed to calibrating an output device such as a color display, using a visual method of determining the gamma for the blue primary that is easier to perform and more consistent than methodologies employing a luminance-matching task. The methodology is based on the insight that accurate gamma estimation for blue is important not for luminance reproduction, but for proper color-balance, and most importantly grey-balance. Thus, it follows to use grey-balancing, rather than luminance-matching, as the criterion for selecting the blue gamma value. One variant as taught herein is to provide a user visual task to find a patch best representing neutral, given previously determined calibrated digital values for the red and green primaries that produce 50% fractional luminance. A large patch is displayed within a larger surround containing both a white border and either a checkerboard or a line pattern, so as to establish a reference for the neutral axis. The user adjusts a control causing only the value of the blue primary to change. This changes the color of the patch in the middle, moving it along a line from yellowish to bluish. The user thus selects the value at which the patch appears most nearly neutral with respect to the surround. Effectively, the task is to match the chromaticity of a grey patch with that of a halftone pattern.

摘要翻译： 本文提供的是针对校准诸如彩色显示器的输出设备的教导，使用与使用亮度匹配任务的方法相比更容易执行并且更一致的蓝色主要的伽马的可视方法。 该方法基于以下认识：蓝色的精确伽玛估计对于亮度再现而言是重要的，但是对于适当的色彩平衡，最重要的是灰平衡。 因此，使用灰度平衡而不是亮度匹配，作为用于选择蓝色伽马值的标准。 给出本文教导的一种变型是提供用户可视化任务，以找到代表中性的最佳贴片，给出产生50％分数亮度的红色和绿色原色的先前确定的校准数字值。 一个较大的贴片显示在一个包含白色边框和棋盘或线条图案的较大环绕中，以便建立中立轴的参考。 用户调整仅导致蓝色主要值改变的控件。 这会改变中间的补丁的颜色，将其沿着一条线从黄色移动到蓝色。 因此，用户选择补丁出现的相对于环绕最接近中立的值。 有效地，任务是将灰色贴片的色度与半色调图案的色度相匹配。

公开(公告)号：US20070268502A1

公开(公告)日：2007-11-22

申请号：US11488355

申请日：2006-07-18

申请人： Ann L. McCarthy ,  Edul N. Dalal ,  Wencheng Wu ,  Dale R. Mashtare ,  Raja Bala

发明人： Ann L. McCarthy ,  Edul N. Dalal ,  Wencheng Wu ,  Dale R. Mashtare ,  Raja Bala

IPC分类号： G06F3/12

CPC分类号： H04N1/6055 ,  G06F3/1204 ,  G06F3/1208 ,  G06F3/1234 ,  G06F3/1273 ,  H04N1/40006 ,  H04N1/6011

摘要： Consistency of document reprints is improved by recording characteristics of a reference printing system used to produce a reference printing of a document, determining related characteristics of a reprint printing system, retrieving the recorded characteristics and compensating for differences between the reference system and the reprint system in the reprint system prior to using the reprint system to produce reprints of the document. Analytical test prints (TPs) are produced with the respective printing systems in close temporal association to the production of the respective reference prints and reprints. TPs can be customized according to aspects of the document. TP customization allows the compensation to address aspects of the printing systems that have a bearing on perceived consistency in the reprints. TPs can be customized with regard to colors in test patches or both the colors and locations of test patches on a page. Compensation is based on measurements of the TPs.

摘要翻译： 通过记录用于生成文档的参考打印的参考打印系统的特性来改进文档重印的一致性，确定重印打印系统的相关特征，检索记录的特性并补偿参考系和重印系统之间的差异 在重印系统使用转印系统之前，重印系统可以重印本文档。 分析测试印刷品（TP）与相应的印刷系统一起生产，与相应的参考印刷品的印刷和重印相关。 TP可以根据文档的方面进行定制。 TP定制允许补偿来处理与重印中感知到的一致性有关的打印系统的方面。 TP可以针对测试补丁中的颜色或页面上测试补丁的颜色和位置进行定制。 补偿是基于TP的测量。

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：US20060227148A1

公开(公告)日：2006-10-12

申请号：US11102423

申请日：2005-04-08

申请人： R. Klassen ,  Raja Bala

发明人： R. Klassen ,  Raja Bala

IPC分类号： G09G5/02

CPC分类号： G09G5/02 ,  G09G2320/0276 ,  G09G2320/0673

摘要： Provided herein are teachings directed to calibrating an output device such as a color display, using a visual method of determining the gamma for the blue primary that is easier to perform and more consistent than methodologies employing a luminance-matching task. The methodology is based on the insight that accurate gamma estimation for blue is important not for luminance reproduction, but for proper color-balance, and most importantly grey-balance. Thus, it follows to use grey-balancing, rather than luminance-matching, as the criterion for selecting the blue gamma value. One variant as taught herein is to provide a user visual task to find a patch best representing neutral, given previously determined calibrated digital values for the red and green primaries that produce 50% fractional luminance. A large patch is displayed within a larger surround containing both a white border and either a checkerboard or a line pattern, so as to establish a reference for the neutral axis. The user adjusts a control causing only the value of the blue primary to change. This changes the color of the patch in the middle, moving it along a line from yellowish to bluish. The user thus selects the value at which the patch appears most nearly neutral with respect to the surround. Effectively, the task is to match the chromaticity of a grey patch with that of a halftone pattern.

摘要翻译： 本文提供的是针对校准诸如彩色显示器的输出设备的教导，使用与使用亮度匹配任务的方法相比更容易执行并且更一致的蓝色主要的伽马的可视方法。 该方法基于以下认识：蓝色的精确伽玛估计对于亮度再现而言是重要的，但是对于适当的色彩平衡，最重要的是灰平衡。 因此，使用灰度平衡而不是亮度匹配，作为用于选择蓝色伽马值的标准。 给出本文教导的一种变型是提供用户可视化任务，以找到代表中性的最佳贴片，给出产生50％分数亮度的红色和绿色原色的先前确定的校准数字值。 一个较大的贴片显示在一个包含白色边框和棋盘或线条图案的较大环绕中，以便建立中立轴的参考。 用户调整仅导致蓝色主要值改变的控件。 这会改变中间的补丁的颜色，将其沿着一条线从黄色移动到蓝色。 因此，用户选择补丁出现的相对于环绕最接近中立的值。 有效地，任务是将灰色贴片的色度与半色调图案的色度相匹配。

公开(公告)号：US09171196B2

公开(公告)日：2015-10-27

申请号：US13416436

申请日：2012-03-09

申请人： Yao Rong Wang ,  Lalit Keshav Mestha ,  Beilei Xu ,  Raja Bala ,  Graham Pennington

发明人： Yao Rong Wang ,  Lalit Keshav Mestha ,  Beilei Xu ,  Raja Bala ,  Graham Pennington

IPC分类号： H04N7/18 ,  G06K9/00 ,  H04N5/33 ,  G06K9/20

CPC分类号： G06K9/00255 ,  G06K9/00838 ,  G06K9/2018 ,  H04N5/33

摘要： What is disclosed is a system and method for selecting the optimal wavelength ban combination for a multi-band infrared camera system which is optimized for skin detection. An objective function is constructed specifically for this application from classified performance and the algorithm generates wavelengths by maximizing the objective function. A specific wavelength band combination is selected which maximizes the objective function. Also disclosed is a 3-band and 4-band camera system with filters each having a transmittance of one of a combination of wavelength bands optimized to detect skin in the infrared band. The camera systems disclosed herein find their intended uses in a wide array of vehicle occupancy detection systems and applications. Various embodiments are disclosed.

摘要翻译： 公开的是用于为针对皮肤检测而优化的多频带红外相机系统选择最佳波长禁止组合的系统和方法。 目标函数由分类性能专门为此应用构建，算法通过最大化目标函数生成波长。 选择使目标函数最大化的特定波段组合。 还公开了一种具有滤波器的三频带和四频带相机系统，每个滤波器具有被优化以检测红外频带中的皮肤的波长带的组合之一的透射率。 本文公开的相机系统在各种车辆占用检测系统和应用中找到其预期用途。 公开了各种实施例。