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11. 发明申请

US20120237087A1 IMAGE QUALITY DEFECT DETECTION VIA SENSOR CHARACTERIZATION AND HALFTONE DOT CLASSIFICATION 有权
标题翻译：图像质量缺陷检测通过传感器特征和HALFTONE DOT分类
公开(公告)号：US20120237087A1
公开(公告)日：2012-09-20
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。

12. 发明申请

US20120296595A1 COMPENSATING FOR SPECTRAL DIFFERENCES BETWEEN TWO SPECTROPHOTOMETERS FOR ACCURATE COLOR MANAGEMENT 审中-公开
标题翻译：对两种光谱仪之间的光谱差异进行精确色彩管理的补偿
公开(公告)号：US20120296595A1
公开(公告)日：2012-11-22
申请号：US13108544
申请日：2011-05-16
申请人： Edul N. DALAL , Lalit Keshav MESTHA , Wencheng WU
发明人： Edul N. DALAL , Lalit Keshav MESTHA , Wencheng WU
IPC分类号： G06F19/00
CPC分类号： G01J3/501 , G01J3/524 , H04N1/6052
摘要： What is disclosed is a system and method for compensating for differences between two spectrophotometers for accurate color control in a color management system. In one example embodiment, at least one print is generated on the digital color printing system incorporating an inline spectral reflectance measurement sensor. A spectral reflectance of the print is measured using an inline spectral reflectance measurement sensor. Spectral reflectance of the print is measured using a selected offline spectral reflectance measurement sensor. From the measurements, a sensor correction model is determined which transforms spectral measurements obtained from the inline sensor into spectra approximating what the offline sensor would measure. The sensor correction model is used to perform color management on the digital color printing system such that print output of the digital color printing system is accurate when measured on the offline sensor.
摘要翻译：公开的是用于补偿两种分光光度计之间在色彩管理系统中精确色彩控制的差异的系统和方法。在一个示例实施例中，在包含内联光谱反射测量传感器的数字彩色打印系统上产生至少一个打印。使用在线光谱反射率测量传感器测量打印的光谱反射率。使用选定的离线光谱反射率测量传感器测量打印的光谱反射率。从测量中，确定传感器校正模型，其将从在线传感器获得的光谱测量值变换为近似离线传感器将测量的光谱。传感器校正模型用于在数字彩色打印系统上执行颜色管理，使得在离线传感器上测量时数字彩色打印系统的打印输出是准确的。

13. 发明申请

US20120044540A1 COLOR MANAGEMENT AND CALIBRATION USING A SCANNER OR CAMERA 有权
标题翻译：使用扫描仪或相机进行颜色管理和校准
公开(公告)号：US20120044540A1
公开(公告)日：2012-02-23
申请号：US12859760
申请日：2010-08-19
申请人： Edul N. DALAL , Wencheng WU
发明人： Edul N. DALAL , Wencheng WU
IPC分类号： G06K15/00 , H04N1/46 , G01J3/42 , G06K9/00
CPC分类号： H04N1/6033 , G01J3/462
摘要： A computer-implemented method for color calibration and profiling of an output device includes measuring a color patch in a test pattern, which comprises a plurality of color patches, to obtain first image data; measuring the color patch in the test pattern to obtain second image data; transforming the first image data to a first estimated image data; determining a difference between the second image data and the first estimated image data to obtain a correction factor; and calculating, for each patch in the test pattern, a corrected image data by applying the correction factor to a subsequent estimated image data from the first sensor. The correction factor is used for correcting inaccuracies introduced when the first image data is transformed into the first estimated image data. The first image data and the second image data provide a measured color representation of the color patch in a device dependent color space and a device independent color space, respectively.
摘要翻译：用于颜色校准和输出设备的轮廓的计算机实现的方法包括测量包括多个色块的测试图案中的色块以获得第一图像数据; 测量测试图案中的色块以获得第二图像数据; 将所述第一图像数据变换为第一估计图像数据; 确定第二图像数据和第一估计图像数据之间的差以获得校正因子; 以及通过将所述校正因子应用于来自所述第一传感器的后续估计图像数据来计算所述测试图案中的每个贴片的校正图像数据。校正因子用于校正当第一图像数据被变换为第一估计图像数据时引入的不精确度。第一图像数据和第二图像数据分别在设备依赖的颜色空间和设备独立的颜色空间中分别提供色标的测量的颜色表示。

14. 发明申请

US20100265522A1 SYSTEMS AND METHODS FOR FORMING A TINT OF A SPOT COLOR 有权
标题翻译：形成点颜色的系统和方法
公开(公告)号：US20100265522A1
公开(公告)日：2010-10-21
申请号：US12424586
申请日：2009-04-16
申请人： Edul N. DALAL , Wencheng WU , Raja BALA
发明人： Edul N. DALAL , Wencheng WU , Raja BALA
IPC分类号： H04N1/60
CPC分类号： H04N1/603
摘要： Systems and methods are provided for rendering tints of spot color objects or target colors between a spot color and a second color in image forming devices. In particular the systems and method provided allow for a sweep of a spot color to be rendered accurately, without discontinuities when transitioning from the tint to the solid spot color. The systems and method will prevent discontinuities even if the solid spot color has been modified by a user.
摘要翻译：提供了系统和方法，用于在图像形成装置中渲染专色对象或专色和第二颜色之间的目标颜色的色调。特别地，所提供的系统和方法允许专色的扫描被精确地渲染，而从色调转变为固体斑点颜色时没有不连续性。即使固体斑点颜色已被用户修改，系统和方法也将防止不连续性。

15. 发明申请

US20100124362A1 DETECTING IMAGE QUALITY DEFECTS BY MEASURING IMAGES PRINTED ON IMAGE BEARING SURFACES OF PRINTING DEVICES 失效
标题翻译：通过测量打印在打印设备的图像轴承表面上的图像来检测图像质量缺陷
公开(公告)号：US20100124362A1
公开(公告)日：2010-05-20
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： G06K9/00 , G06K15/02
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。

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