公开(公告)号：US20120224872A1

公开(公告)日：2012-09-06

申请号：US13039013

申请日：2011-03-02

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

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

IPC分类号： G03G15/00

CPC分类号： G03G15/0189 ,  G03G15/5062 ,  G03G2215/00063 ,  G03G2215/00067

摘要： A sensor used for determining area coverages of each colorant in a printed image is provided. The sensor includes a plurality of sensing elements for determining area coverages of each colorant in a printed image that includes a plurality of colorants including a black colorant. One of the sensing elements is an infrared sensing element configured to measure infrared reflection, and the others of the sensing elements are each configured to detect a visible color.

摘要翻译： 提供了用于确定印刷图像中每种着色剂的面积覆盖率的传感器。 传感器包括多个感测元件，用于确定印刷图像中每种着色剂的面积覆盖率，其包括多个包括黑色着色剂的着色剂。 感测元件中的一个是被配置为测量红外反射的红外感测元件，并且其它感测元件被配置为检测可见颜色。

公开(公告)号：US20110228988A1

公开(公告)日：2011-09-22

申请号：US12727724

申请日：2010-03-19

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： G06K9/46 ,  G06T7/00

CPC分类号： G06T7/0006 ,  G06T2207/10024 ,  G06T2207/30144

摘要： What is disclosed is a novel system and method for determining printer performance in terms of image quality (IQ) on-paper using on-belt measurements. First, image noise is measured via sensing of single-separation device-dependent colors on an imaging member for a target marking device. Such single-separation device-dependent colors, in one embodiment, comprise cyan, magenta, yellow and black. A predictive correlation model is used to project the image noise of the single-separation device-dependent colors when printed on a substrate. A noise prediction model is used to estimate image noise performance values of multi-separation device-dependent colors on a substrate from the projected single-separation device-dependent colors on a substrate. In one embodiment, the predictive correlation model comprises a separation-dependent polynomial equation. The estimated image noise performance values on a substrate are used to determine image quality metric of the target marking device.

摘要翻译： 所公开的是使用带上测量在纸上使用图像质量（IQ）来确定打印机性能的新型系统和方法。 首先，通过感测目标标记装置的成像构件上的单分离装置相关颜色来测量图像噪声。 在一个实施例中，这种单分离装置相关的颜色包括青色，品红色，黄色和黑色。 使用预测相关模型来投影印刷在基板上的单分离装置相关颜色的图像噪声。 噪声预测模型用于从基底上投影的单分离装置依赖颜色估计基板上多分离装置相关颜色的图像噪声性能值。 在一个实施例中，预测相关模型包括分离依赖多项式方程。 使用基板上的估计图像噪声性能值来确定目标标记装置的图像质量度量。

公开(公告)号：US07773774B2

公开(公告)日：2010-08-10

申请号：US10878265

申请日：2004-06-28

申请人： D. Rene Rasmussen ,  Meera Sampath ,  Edul N. Dalal

发明人： D. Rene Rasmussen ,  Meera Sampath ,  Edul N. Dalal

IPC分类号： G06K9/00 ,  H04N1/40

CPC分类号： B41J29/393 ,  H04N1/00002 ,  H04N1/00005 ,  H04N1/00015 ,  H04N1/00018 ,  H04N1/00034 ,  H04N1/00045 ,  H04N1/0005 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00087

摘要： The present invention is directed to a system and method for test target selection in conjunction with dynamic test pattern generation. In the invention, a test pattern page(s) is composed using an optimal set of test targets, which can be accommodated or adjusted to fit within size constraints of the test pattern. The method of the present invention makes use of layout optimization to ensure that related and optimized test targets are accommodated on a single test pattern. For example, it may be preferable to “squeeze in” a smaller-than-normal uniform area target, rather than not to print it at all during a test.

摘要翻译： 本发明涉及一种结合动态测试图形生成的测试目标选择的系统和方法。 在本发明中，测试图案页面是使用最佳的一组测试目标来构成的，该测试目标可被容纳或调整以适应测试图案的尺寸限制。 本发明的方法利用布局优化来确保相关和优化的测试目标被容纳在单个测试图案上。 例如，优选的是“挤压”小于正常的均匀面积目标，而不是在测试期间根本不打印它。

公开(公告)号：US07660460B2

公开(公告)日：2010-02-09

申请号：US11274638

申请日：2005-11-15

申请人： Wencheng Wu ,  Edul N. Dalal ,  Zhigang Fan

发明人： Wencheng Wu ,  Edul N. Dalal ,  Zhigang Fan

IPC分类号： G06K9/00 ,  G06K9/34

CPC分类号： H04N1/603 ,  G06K9/00449

摘要： In preparation for rendering respective portions of a document via a respective plurality of engines, objects within the document are identified and characterized. A determination is made as to whether gamut variations between the engines might result in objectionable variations in the appearance of rendered versions of identified objects having similar characteristics. For those objects within the document for which the determination is made that variations might be objectionable, a target gamut is selected to be an intersection gamut of the engines to be used to render the document. For those objects within the document for which the determination is made that variations would be unobjectionable, the target gamut is selected to be that of selected individual engines. A system for selecting target gamuts for objects within a document can include an object identifier, a characteristic identifier and a gamut selector.

摘要翻译： 在准备通过相应的多个引擎呈现文档的各个部分时，识别和表征文档内的对象。 确定发动机之间的色域变化是否可能导致具有相似特征的识别对象的渲染版本的外观的令人反感的变化。 对于确定变化可能令人反感的文档中的那些对象，目标色域被选择为用于呈现文档的引擎的交叉色域。 对于确定变化是无反应的文档中的那些对象，目标色域被选择为所选择的各个引擎的目标色域。 用于为文档中的对象选择目标色域的系统可以包括对象标识符，特征标识符和色域选择器。

公开(公告)号：US07652791B2

公开(公告)日：2010-01-26

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：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：US06912071B1

公开(公告)日：2005-06-28

申请号：US09450185

申请日：1999-11-29

申请人： D. Rene Rasmussen ,  Edul N. Dalal

发明人： D. Rene Rasmussen ,  Edul N. Dalal

IPC分类号： H04N1/00

CPC分类号： H04N1/00002 ,  H04N1/00015 ,  H04N1/00045 ,  H04N1/00055 ,  H04N1/00087

摘要： A virtual tech rep system that can assist in reducing service call visits and customer complaints by readily analyzing image quality of an output image device, such as a copier or printer. The system generates a hardcopy test pattern output from the copier or printer and then scans the test pattern using either the platen of the digital copier or an external scanner to form a digital raster image. Test targets in the digital raster image are then determined using pattern recognition software and image quality analysis is then performed on the test targets based on the sensitivity of the human visual system. It is preferable that the image quality analysis is based on human vision systems rather than a direct comparison between original and printed images as many differences may go unnoticed by a human viewer whereas other types of differences may be readily noticed, even if only slight. The system optionally sends the test results and possibly part or all of the scanned test pattern to a service or diagnostic facility (remote or local) for further analysis when potential defects are identified. This process may be performed at start-up or automatically initiated after a predetermined number of operating cycles or hours of use have been attained.

摘要翻译： 虚拟技术代表系统，可以通过轻松分析输出图像设备（如复印机或打印机）的图像质量来帮助减少服务呼叫访问和客户投诉。 系统生成从复印机或打印机输出的硬拷贝测试图案，然后使用数字复印机的压板或外部扫描仪扫描测试图案，以形成数字光栅图像。 然后使用模式识别软件确定数字光栅图像中的测试目标，然后基于人类视觉系统的灵敏度对测试目标进行图像质量分析。 优选地，图像质量分析基于人类视觉系统，而不是原始和打印图像之间的直接比较，因为许多差异可能不被人类观察者注意到，而其他类型的差异可能容易被注意到，即使只是轻微的。 系统可选地将测试结果以及可能的部分或全部扫描测试图案发送到服务或诊断设备（远程或本地），以便在识别出潜在缺陷时进行进一步分析。 该过程可以在启动时执行或者在已经达到预定数量的操作循环或使用小时之后自动启动。

公开(公告)号：US06606395B1

公开(公告)日：2003-08-12

申请号：US09450182

申请日：1999-11-29

申请人： D. Rene Rasmussen ,  Edul N. Dalal

发明人： D. Rene Rasmussen ,  Edul N. Dalal

IPC分类号： G06K900

CPC分类号： H04N1/00002 ,  B41J29/393 ,  H04N1/00015 ,  H04N1/00023 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00058 ,  H04N1/00068 ,  H04N2201/3226 ,  H04N2201/3269 ,  H04N2201/3271 ,  H04N2201/3274

摘要： An image quality analysis system is provided that can determine various aspects of image quality easily and with minimal user involvement and minimal user expertise. The system uses a scanner, either a stand-alone or part of a multi-function printer/scanner/copier, to scan a printed test pattern, and then perform a series of analyses on the scanned image using an image quality analysis module that may be built into the image output device being tested, or provided as a stand-alone component that can receive the output from the scanner. There are often a number of different test patterns that would be used depending on which print quality issues are being tested. By encoding each test pattern with a coded identification label, not only can the particular test pattern be identified, but the analysis to be performed can also be determined from the corresponding script when the printed test pattern is scanned and subsequently decoded. Particularly suitable decoders are OCR and barcode readers. Such identification labels and/or scripts can also be used to identify a particular machine that is being tested and other relevant information.

摘要翻译： 提供了一种图像质量分析系统，其可以容易地并且以最小的用户参与和最小的用户专业知识来确定图像质量的各个方面。 系统使用扫描仪，独立的或多功能打印机/扫描仪/复印机的一部分扫描打印的测试图案，然后使用图像质量分析模块对扫描图像执行一系列分析，图像质量分析模块 被内置到被测试的图像输出设备中，或者被提供为可以从扫描仪接收输出的独立组件。 根据哪个打印质量问题正在测试，通常会使用许多不同的测试模式。 通过用编码的识别标签对每个测试图案进行编码，不仅可以识别特定的测试图案，而且当打印的测试图案被扫描并随后解码时，也可以从相应的脚本确定要执行的分析。 特别适合的解码器是OCR和条形码阅读器。 此类识别标签和/或脚本也可用于识别正在测试的特定机器和其他相关信息。

公开(公告)号：US06597473B1

公开(公告)日：2003-07-22

申请号：US09450183

申请日：1999-11-29

申请人： D. Rene Rasmussen ,  Edul N. Dalal

发明人： D. Rene Rasmussen ,  Edul N. Dalal

IPC分类号： G06F1500

CPC分类号： H04N1/00015 ,  H04N1/00002 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00061 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00079

摘要： An image quality analysis system is provided for image output devices, such as printers and copiers, that overcomes problems with differences in analysis results caused by use of different image input devices. This is achieved by computing a differential transfer function that makes subsequent analysis device independent. Moreover, the analysis is performed on an image that has been blurred to also reflect absolute image quality metrics as seen by a human observer. By determining the resolving characteristics of the input scanner, the scanned image can be processed, with little or no artifacts, to resemble the image as perceived by a human observer, while at the same time eliminating differences that would arise when using a scanner having a different spatial resolving power.

摘要翻译： 为图像输出设备（如打印机和复印机）提供图像质量分析系统，克服了使用不同图像输入设备导致的分析结果差异的问题。 这是通过计算使后续分析设备独立的差分传递函数来实现的。 此外，对已经模糊的图像进行分析，以也反映人类观察者所看到的绝对图像质量度量。 通过确定输入扫描仪的分辨率特性，扫描的图像可以很少或没有瑕疵被处理成类似于人类观察者感知到的图像，同时消除当使用具有 不同的空间分辨力。

公开(公告)号：US06522430B1

公开(公告)日：2003-02-18

申请号：US09450184

申请日：1999-11-29

申请人： Edul N. Dalal ,  D. Rene Rasmussen

发明人： Edul N. Dalal ,  D. Rene Rasmussen

IPC分类号： H04N100

CPC分类号： H04N1/00015 ,  H04N1/00002 ,  H04N1/00023 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00063 ,  H04N1/00079

摘要： An image quality analysis system is provided that allows highly accurate measurements of motion quality defects. The motion quality analysis process relies only on relative measurements, which can be performed sufficiently accurately with standard input scanners. The technique can therefore be incorporated in the image path of a copier or multi-function printer being tested to allow on-the-fly motion quality correction without the need for expensive, high precision measuring equipment. The system includes one or more digital test patterns provided in hardcopy form for providing one or more hardcopy test images, an input scanner that can scan the hard copy test image to form a digital raster image, and an image quality analysis module that receives information about the position of the digital raster image and produces test results relevant to determination of image quality analysis, particularly motion quality defects. The method is accurate and robust using relatively low-resolution CCD-based flat bed scanners, even in spite of their long-range positional errors.

摘要翻译： 提供了一种能够高精度测量运动质量缺陷的图像质量分析系统。 运动质量分析过程仅依赖于相对测量，可以使用标准输入扫描仪进行足够精确的测量。 因此，该技术可以被并入被测试的复印机或多功能打印机的图像路径中，以允许即时运动质量校正，而不需要昂贵的高精度测量设备。 该系统包括以硬拷贝形式提供的用于提供一个或多个硬拷贝测试图像的一个或多个数字测试图案，可以扫描硬拷贝测试图像以形成数字光栅图像的输入扫描仪，以及接收关于 数字光栅图像的位置，并产生与确定图像质量分析相关的测试结果，特别是运动质量缺陷。 该方法使用相对低分辨率的基于CCD的平板扫描仪是准确和稳健的，即使它们的远程位置误差也是如此。