公开(公告)号：US08571269B2

公开(公告)日：2013-10-29

申请号：US13049191

申请日：2011-03-16

申请人： Wencheng Wu ,  Beilei Xu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Beilei Xu ,  Edul N. Dalal

IPC分类号： G06K9/00

CPC分类号： H04N1/52 ,  H04N1/405

摘要： What is disclosed is a system and method for image quality (IQ) defect detection via classification of halftone dots present on customer prints. In one embodiment, spatially-varying thresholds are applied on the sensed image in order to classify the halftone dots for IQ defect detection. The resolving power of the sensor is characterized and the sensor responses to patches printed with the print device are characterized. A de-blurring filter is designed which is appropriate for compensating the characterized resolving power of the sensor. Image enhancement is applied to the image using the de-blurring filter. Halftone dots present on the prints are classified by analyzing the enhanced image with the results of the sensor response characterization. Once classified, single separation halftone dot images can be more readily analyzed for defects. The present method allows sensor resolution as low as the size of the halftone dots of the printer under test.

摘要翻译： 公开的是通过客户印刷品上存在的半色调点的分类的图像质量（IQ）缺陷检测的系统和方法。 在一个实施例中，空间变化的阈值被施加在所感测的图像上，以便对用于IQ缺陷检测的半色调点进行分类。 表征传感器的分辨率，并对传感器对印刷设备印刷的贴片进行响应。 设计了一种去模糊滤波器，适用于补偿传感器的特征分辨率。 图像增强应用于使用去模糊滤镜的图像。 使用传感器响应表征的结果分析增强图像，将印刷品上存在的半色调点分类。 一旦分类，单分离半色调点图像可以更容易地分析缺陷。 本方法允许传感器分辨率低于被测打印机的半色调点的大小。

公开(公告)号：US20130191014A1

公开(公告)日：2013-07-25

申请号：US13357034

申请日：2012-01-24

申请人： Edul N. Dalal ,  Wencheng Wu

发明人： Edul N. Dalal ,  Wencheng Wu

IPC分类号： G08G1/052

CPC分类号： G08G1/0116 ,  G06K9/2018 ,  G08G1/052 ,  G08G1/054

摘要： A system and method which detects and uses a point of contact between a vehicle's tire and the pavement as a reference point to improve the accuracy of vehicle speed detection in a motorized vehicle speed detection system. In one embodiment, a plurality of infrared images of a moving vehicle are received. Each of the images is separated in time by known intervals. The images are captured using an infrared camera which can be a single-band or multi-band camera which operates in an infrared wavelength band selected to enhance a contrast between the vehicle's tires and the road surface. For each image, a point of contact is determined where a same tire contacts the road surface. These points and the time interval separations are used to calculate the vehicle's speed. An alert signal is initiated to a traffic enforcement authority if the speed exceeds the road's speed limit.

摘要翻译： 检测并使用车辆的轮胎与路面之间的接触点作为基准点的系统和方法，以提高机动车辆速度检测系统中的车辆速度检测的精度。 在一个实施例中，接收移动车辆的多个红外图像。 每个图像以已知的间隔在时间上分离。 使用红外线摄像机拍摄图像，该红外摄像机可以是选择的红外波长带中操作的单频带或多频带相机，以增强车辆轮胎和路面之间的对比度。 对于每个图像，确定相同轮胎接触路面的接触点。 这些点和时间间隔分离用于计算车辆的速度。 如果速度超过道路的速度限制，则向交通执法机关发出警报信号。

公开(公告)号：US08477370B2

公开(公告)日：2013-07-02

申请号：US12727760

申请日：2010-03-19

申请人： Edul N. Dalal ,  Wencheng Wu ,  Martin S. Maltz

发明人： Edul N. Dalal ,  Wencheng Wu ,  Martin S. Maltz

IPC分类号： H04N1/60 ,  H04N1/46

CPC分类号： H04N1/603 ,  H04N1/6022

摘要： What is disclosed is a novel system and method for determining color profiles based upon optimizing image output color stability. For each of a number of selected output colors, color stability values for a set of device-dependent color specifications that produce the selected output color are iteratively determined. The set of device-dependent color specifications is generated by varying a subset of colorants in the device-dependent color specifications while changing the remaining colorants to maintain the selected output color. The iterative process improves the color stability value, as determined by a color stability model, of the device-dependent color specifications that correspond to the selected output color. When an optimum color stability value is found, the device-dependent color specification having that color stability value is selected as the mapping for the selected device-independent color specification. Various embodiments are disclosed.

摘要翻译： 公开的是基于优化图像输出颜色稳定性来确定颜色特征的新颖系统和方法。 对于多个选择的输出颜色中的每一个，迭代地确定产生所选输出颜色的一组依赖于设备的颜色规格的颜色稳定性值。 通过根据设备相关的颜色规格改变着色剂的子集，同时改变剩余着色剂以维持所选择的输出颜色，来生成依赖于设备的颜色规范。 迭代过程根据颜色稳定性模型改善与所选输出颜色对应的依赖于设备的颜色规格的颜色稳定性值。 当找到最佳颜色稳定性值时，选择具有该颜色稳定性值的依赖于设备的颜色规格作为所选设备无关颜色规范的映射。 公开了各种实施例。

公开(公告)号：US08462386B2

公开(公告)日：2013-06-11

申请号：US12607212

申请日：2009-10-28

申请人： Edul N. Dalal ,  Wencheng Wu ,  Alvaro E. Gil ,  Peter A. Crean

发明人： Edul N. Dalal ,  Wencheng Wu ,  Alvaro E. Gil ,  Peter A. Crean

IPC分类号： G01J3/46

CPC分类号： G01J3/46 ,  G01J3/462 ,  G01J3/463 ,  H04N1/6033

摘要： Differences between an offline spectrophotometer and an inline spectrophotometer can result in differences between a hardcopy target color and a printed reproduction of that color. The inline spectrophotometer is inside of a printer and configured to measure printer output. As such, the inline spectrophotometer cannot conveniently measure the hardcopy target color. A printing error or an instrument offset can be determined and passed to a color correction module that updates the device dependent color specification associated with the given spot color. This color specification may be stored, for example, in the printer controller, and used when a document subsequently calls for that spot color, thereby providing accurate color reproduction from that particular printer incorporating that particular inline spectrophotometer.

摘要翻译： 离线分光光度计和在线分光光度计之间的差异可能导致硬拷贝目标颜色和该颜色的印刷再现之间的差异。 在线分光光度计位于打印机内部，并配置为测量打印机输出。 因此，在线分光光度计不能方便地测量硬拷贝目标颜色。 可以确定打印错误或仪器偏移并将其传递给更新与给定专色相关联的依赖于设备的颜色规格的颜色校正模块。 该颜色规范可以存储在例如打印机控制器中，并且当文档随后调用该专色时使用，从而从包含该特定的在线分光光度计的特定打印机提供准确的颜色再现。

公开(公告)号：US20130132166A1

公开(公告)日：2013-05-23

申请号：US13298949

申请日：2011-11-17

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： G07B15/02

CPC分类号： G07B15/06 ,  G08G1/015 ,  G08G1/0175

摘要： A smart toll network system for “network-based” analysis via communication of relevant vehicle identifications among to stations (i.e., by forming a smart toll network) coupled with a probabilistic-based search is disclosed. Comparing vehicle identification data (such as license plate recognition and vehicle signatures) between toll stations improves the performance relative to point-based vehicle identification analysis. Of the vehicles unidentified by license plate recognition, vehicle signatures are used to link each of them to the corresponding vehicle at the opposite end of the tolling system. If license plate recognition fails on a vehicle at an exit station, vehicle signatures can be used to find the location where that vehicle entered the tolling system. If license plate recognition was successful at the entrance station, that same license plate number can be assigned to that vehicle at the exit station, on the basis of the vehicle signature matching, without requiring human intervention.

摘要翻译： 公开了一种智能收费网络系统，用于通过与站点之间的相关车辆标识的通信（即，通过形成智能收费网络）与基于概率的搜索相结合进行“基于网络”的分析。 在收费站之间比较车辆识别数据（如车牌识别和车辆签名）可以提高相对于基于点的车辆识别分析的性能。 在车牌识别未识别的车辆中，车辆签名用于将其中的每一个与收费系统相对端的相应车辆相连接。 如果出口车辆的车牌识别失败，车辆签名可用于查找车辆进入收费系统的位置。 如果入场车站的车牌识别成功，则可以根据车辆签名匹配在出口车站将相同的车牌号码分配给该车辆，而不需要人为干预。

公开(公告)号：US20120200864A1

公开(公告)日：2012-08-09

申请号：US13023822

申请日：2011-02-09

申请人： Edul N. Dalal ,  Wencheng Wu ,  Robert J. Rolleston

发明人： Edul N. Dalal ,  Wencheng Wu ,  Robert J. Rolleston

IPC分类号： H04N1/60

CPC分类号： H04N1/54 ,  H04N1/603 ,  H04N1/628

摘要： What is disclosed is a novel system and method for determining and capturing the designer intended colors in an image so that the printer has an accurate color rendition target. The present method operates by capturing the monitor RGB values together with the monitor profile to get a representation of the intended image in a device-independent color space like L*a*b*. The teachings hereof work for vector graphics as well as raster images. Advantageously, this invention solves a real problem currently existing, for example, in the packaging print market, wherein colors produced from multiple spot colors with their overlays and blends are not well color managed.

摘要翻译： 公开的是用于确定和捕获图像中的设计者预期颜色的新型系统和方法，使得打印机具有准确的色彩再现目标。 本方法通过将监视器RGB值与监视器配置文件一起捕获来操作，以在与设备无关的颜色空间（如L * a * b *）中获得所需图像的表示。 这里的教学工作用于矢量图形以及光栅图像。 有利地，本发明解决了例如在包装印刷市场中存在的真实问题，其中由具有它们的覆盖物和共混物的多种专色产生的颜色不是很好的颜色管理。

公开(公告)号：US08208183B2

公开(公告)日：2012-06-26

申请号：US12273643

申请日：2008-11-19

申请人： Wencheng Wu ,  Edul N. Dalal ,  Rajinderjeet Minhas

发明人： Wencheng Wu ,  Edul N. Dalal ,  Rajinderjeet Minhas

IPC分类号： H04N1/46

CPC分类号： G03G15/0152 ,  G03G15/0163 ,  G03G15/5041 ,  G03G2215/00037 ,  G03G2215/00063 ,  G03G2215/0158 ,  G03G2215/0167 ,  G03G2215/0187 ,  G06T7/001 ,  G06T2207/30144

摘要： Systems and methods for implementing use of customer documents in maintaining image quality or image quality consistency of printing devices are provided. The system may include a marking engine constructed to print images on an image bearing surface of the print device; one or more color measuring devices for measured toner images formed on the image bearing surface corresponding to the one or more relevant pages, and an image analyzer configured to generate reference images and to compare measured image data with the reference images. The image analyzer may also be configured to analyze input image data for a document and to identify one or more relevant pages of the document that may provide information regarding the state of the printing system to generated reference image data. Comparisons between the color separations of the reference image data and measured image data images may be realized for determining defects.

摘要翻译： 提供了在维护打印设备的图像质量或图像质量一致性中实现客户文档的使用的系统和方法。 所述系统可以包括构造成在所述打印装置的图像承载表面上打印图像的标记引擎; 一个或多个用于测量的调色剂图像的颜色测量装置，其形成在与所述一个或多个相关页面对应的图像承载表面上;以及图像分析器，被配置为产生参考图像并且将测量的图像数据与参考图像进行比较。 图像分析器还可以被配置为分析用于文档的输入图像数据并且识别文档的一个或多个相关页面，其可以提供关于打印系统的状态的信息以产生参考图像数据。 可以实现参考图像数据和测量图像数据图像的分色之间的比较以确定缺陷。

公开(公告)号：US20120092409A1

公开(公告)日：2012-04-19

申请号：US12906694

申请日：2010-10-18

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： B41J29/393

CPC分类号： B41J2/2142 ,  B41J2/2139 ,  B41J2/2146

摘要： A system and method detect missing inkjets in an inkjet image generating system. The system and method generate digital images of printed documents that do not have test pattern data within them. The digital images are processed to detect light streaks and the positions of the light streaks are correlated to inkjet positions in printheads. Identification of the ink color associated with the correlated inkjet positions are obtained with analysis of color separated images and/or color errors.

摘要翻译： 一种系统和方法检测喷墨图像生成系统中的缺失喷墨。 该系统和方法生成在其中没有测试图案数据的打印文档的数字图像。 处理数字图像以检测光条纹，并且光条纹的位置与打印头中的喷墨位置相关。 通过分析颜色分离图像和/或颜色误差来获得与相关喷墨位置相关联的墨水颜色的识别。

公开(公告)号：US20120086959A1

公开(公告)日：2012-04-12

申请号：US12902669

申请日：2010-10-12

申请人： Wencheng Wu ,  Edul N. Dalal ,  Alvaro Enrique Gil ,  Lalit Keshav Mestha

发明人： Wencheng Wu ,  Edul N. Dalal ,  Alvaro Enrique Gil ,  Lalit Keshav Mestha

IPC分类号： H04N1/60

CPC分类号： H04N1/6022 ,  H04N1/54

摘要： What is disclosed is a novel system and method for obtaining optimum CMYK values for spot colors, with significantly lower computational effort, by using a set of printer profiles with different pre-computed GCR strategies. Various versions are discussed on how to utilize and/or choose among these profiles for each spot color. The present invention is applicable to spot color emulation for CMYK as well as N-color printing, and can be used to optimize one or more image quality attributes, including graininess, mottle, color stability, ink cost, etc. Various embodiments are disclosed.

摘要翻译： 公开的是一种用于通过使用具有不同的预先计算的GCR策略的一组打印机配置文件来获得专色的最佳CMYK值的新型系统和方法，具有显着更低的计算量。 讨论各种版本如何在每个专色的这些轮廓中使用和/或选择。 本发明适用于CMYK的专色仿真以及N色印刷，可用于优化一个或多个图像质量属性，包括粒度，斑点，颜色稳定性，墨水成本等。各种实施例被公开。

公开(公告)号：US20110267632A1

公开(公告)日：2011-11-03

申请号：US12772657

申请日：2010-05-03

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： G06F15/00

CPC分类号： H04N1/50 ,  B41J2/2135 ,  B41J11/46

摘要： A method for performing color registration on template media having template markings thereon comprises sensing the template media using a sensor to obtain first image data; printing a test pattern on the template media; sensing the template media along with the test pattern printed thereon using the sensor to obtain second image data; determining an output image data of the test pattern from the first image data, the second image data, and an estimated image data of the template media with the test pattern printed thereon; determining process direction and cross-process direction misregistrations from the output image data; and adjusting printheads based on the process direction and the cross-process direction misregistrations to provide adjusted color registration on subsequent template media. The estimated image data is representative of light scatter from the test pattern and light absorption by the test pattern

摘要翻译： 用于在其上具有模板标记的模板介质上进行颜色配准的方法包括使用传感器感测模板介质以获得第一图像数据; 在模板媒体上打印测试图案; 使用所述传感器与所述测试图案一起感测所述模板介质以获得第二图像数据; 从所述第一图像数据，所述第二图像数据和所述测试图案上印刷的所述模板介质的估计图像数据确定所述测试图案的输出图像数据; 从输出图像数据确定处理方向和交叉处理方向不对准; 以及基于过程方向和交叉过程方向不对准来调整打印头，以在随后的模板介质上提供调整的颜色配准。 估计的图像数据表示来自测试图案的光散射和测试图案的光吸收