公开(公告)号：US06954287B1

公开(公告)日：2005-10-11

申请号：US09435256

申请日：1999-11-05

申请人： Thyagarajan Balasubramanian ,  Ricardo L. de Queiroz ,  Reiner Eschbach ,  Wencheng Wu

发明人： Thyagarajan Balasubramanian ,  Ricardo L. de Queiroz ,  Reiner Eschbach ,  Wencheng Wu

IPC分类号： G06T1/00 ,  H04N1/46 ,  H04N1/60 ,  G06F15/00

CPC分类号： H04N1/6058

摘要： A color printing process, printing a color image in which out-of-gamut original colors are present. For each pixel defined by an original color which is determined to be out of gamut, a gamut remapping process is applied to map each pixel to a color which is within a printer gamut, remapping said pixels to colors within an output printer gamut. For a given set of gamut remapped pixels, gamut remapped pixel colors are compared with said original pixel colors, to derive a comparison metric. Using the comparison metric, a corrected set of gamut remapped colors is generated. The comparison metric may be subjected to an adaptive filtering process, which strengthens the comparison metric in high frequency image regions to increase its impact on the gamut remapped colors, and weakens the comparison metric in low frequency areas, to weaken its impact on the gamut remapped colors. The filter is selected by determining a filter selection metric in accordance with measured local image activity and changing filter parameters as a function of the determined filter selection metric.

摘要翻译： 彩色打印处理，打印出色域原色的彩色图像。 对于被确定为超出色域的原始颜色限定的每个像素，应用色域重新映射处理以将每个像素映射到在打印机色域内的颜色，将所述像素重新映射到输出打印机色域内的颜色。 对于给定的色域重映射像素集合，将色域重新映射的像素颜色与所述原始像素颜色进行比较，以导出比较度量。 使用比较度量，生成校正的色域重映射颜色集合。 比较度量可以进行自适应滤波处理，其加强了高频图像区域中的比较度量，以增加其对色域重映射颜色的影响，并且削弱了低频区域中的比较度量，以削弱其对色域重新映射的影响 颜色。 通过根据测量的本地图像活动确定滤波器选择度量并根据所确定的滤波器选择度量来改变滤波器参数来选择滤波器。

公开(公告)号：US10713499B2

公开(公告)日：2020-07-14

申请号：US13453089

申请日：2012-04-23

申请人： Wencheng Wu

发明人： Wencheng Wu

IPC分类号： G06K9/00 ,  G06K9/20 ,  G06K9/32 ,  H04N7/18

摘要： A method and system for real-time video triggering for traffic surveillance and photo enforcement comprises receiving a streaming video feed and performing a spatial uniformity correction on each frame of the streaming video feed and resampling the video feed to a lower spatial resolution. Motion blobs are then detected. Next a three-layered approach is used to identify candidate motion blobs which can be output to a triggering module to trigger a video collection action.

公开(公告)号：US09060164B2

公开(公告)日：2015-06-16

申请号：US13610907

申请日：2012-09-12

申请人： Wencheng Wu ,  Edul N. Dalal

发明人： Wencheng Wu ,  Edul N. Dalal

IPC分类号： H04N17/00 ,  G08G1/04

CPC分类号： H04N17/002 ,  G08G1/04

摘要： A method for determining a response to misalignment of a camera monitoring a desired area includes acquiring temporal related frames from the camera including a reference frame. A pixel location is determined of a reference object from the frames. Using the pixel location of the reference object, a displacement of the camera between a current frame and the reference frame is determined. For the displacement exceeding a first threshold, a new displacement of the camera is measured by introducing at least one additional object to a camera field of view and comparing the new displacement to a second threshold. For the new displacement not exceeding the second threshold, the camera is recalibrated using a determined pixel location and a physical location of the at least one additional object. For the new displacement exceeding the second threshold, notification is provided of a misalignment to an associated user device.

摘要翻译： 用于确定对监视所需区域的相机的未对准的响应的方法包括从摄像机获取包括参考帧的时间相关帧。 从帧中确定参考对象的像素位置。 使用参考对象的像素位置，确定相机在当前帧与参考帧之间的位移。 对于超过第一阈值的位移，通过将至少一个附加对象引入照相机视野并将新位移与第二阈值进行比较来测量照相机的新位移。 对于不超过第二阈值的新位移，使用确定的像素位置和至少一个附加对象的物理位置来重新校准照相机。 对于超过第二阈值的新位移，向相关联的用户设备通知未对准。

公开(公告)号：US09025024B2

公开(公告)日：2015-05-05

申请号：US13247343

申请日：2011-09-28

申请人： Beilei Xu ,  Wencheng Wu ,  Lalit Keshav Mestha ,  Graham Pennington

发明人： Beilei Xu ,  Wencheng Wu ,  Lalit Keshav Mestha ,  Graham Pennington

IPC分类号： H04N7/18 ,  G06K9/20 ,  H04N5/232 ,  H04N5/33

CPC分类号： G06K9/2018 ,  H04N5/23206 ,  H04N5/23219 ,  H04N5/332

摘要： What is disclosed is a system and method for identifying materials comprising an object captured in a video and for using the identified materials to track that object as it moves across the captured video scene. In one embodiment, a multi-spectral or hyper-spectral sensor is used to capture a spectral image of an object in an area of interest. Pixels in the spectral planes of the spectral images are analyzed to identify a material comprising objects in that area of interest. A location of each of the identified objects is provided to an imaging sensor which then proceeds to track the objects as they move through a scene. Various embodiments are disclosed.

摘要翻译： 公开的是用于识别包括在视频中捕获的对象的材料的系统和方法，并且用于当所述对象在所捕获的视频场景中移动时使用所识别的材料来跟踪该对象。 在一个实施例中，使用多光谱或超光谱传感器来捕获感兴趣区域中的对象的光谱图像。 分析光谱图像的光谱平面中的像素以识别包含该感兴趣区域中的物体的材料。 每个识别的对象的位置被提供给成像传感器，然后成像传感器在它们移动通过场景时跟踪对象。 公开了各种实施例。

公开(公告)号：US08861023B2

公开(公告)日：2014-10-14

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 ,  H04N1/54 ,  H04N1/62

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：US08855436B2

公开(公告)日：2014-10-07

申请号：US13277719

申请日：2011-10-20

申请人： Orhan Bulan ,  Edgar A. Bernal ,  Robert P. Loce ,  Wencheng Wu

发明人： Orhan Bulan ,  Edgar A. Bernal ,  Robert P. Loce ,  Wencheng Wu

IPC分类号： G06K9/36 ,  G06K9/46 ,  H04N19/107 ,  H04N19/172 ,  H04N19/139

CPC分类号： G08G1/0133 ,  G06K9/00785 ,  H04N19/107 ,  H04N19/139 ,  H04N19/172 ,  H04N19/513 ,  H04N19/61

摘要： A method of, and system for, selective video frame compression and decompression is presented. The disclosed technique is particularly suited for efficient event-driven searching in large databases. The technique involves designating certain frames in a video sequence as reference frames, to be compressed using a first compression technique, where the remaining frames are compressed using a second compression technique. The first compression technique may be implemented without requiring data from any neighboring frames.

摘要翻译： 提出了选择性视频帧压缩和解压缩的方法和系统。 所公开的技术特别适用于在大数据库中有效的事件驱动搜索。 该技术涉及将视频序列中的某些帧指定为参考帧，以使用第一压缩技术进行压缩，其中使用第二压缩技术来压缩剩余的帧。 可以实现第一压缩技术，而不需要来自任何相邻帧的数据。

公开(公告)号：US08797589B2

公开(公告)日：2014-08-05

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 ,  G06F15/00 ,  H04N1/407 ,  H04N1/46 ,  G03F3/08

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。

公开(公告)号：US08646862B2

公开(公告)日：2014-02-11

申请号：US13407437

申请日：2012-02-28

申请人： Wencheng Wu ,  Beilei Xu ,  David A. Mantell

发明人： Wencheng Wu ,  Beilei Xu ,  David A. Mantell

IPC分类号： B41J29/38 ,  B41J29/393 ,  B41J2/045

CPC分类号： B41J2/04543 ,  B41J2/0451 ,  B41J2/04545 ,  B41J2/04586 ,  B41J2/2139

摘要： In an inkjet printer, a method for of compensating for defects in printed images identifies a cross-process direction location of a defect in a printed image and a candidate inkjet corresponding to the location of the defect. The method modifies the operation of the candidate inkjet to form a second ink image. The method identifies a second inkjet that actually formed the first image defect in response to identifying a second defect in the second ink image located proximate to the first defect. The method enables identification and compensation of inoperable inkjets when image data do not correspond perfectly to inkjets in the printer.

摘要翻译： 在喷墨打印机中，用于补偿打印图像中的缺陷的方法识别打印图像中的缺陷的交叉处理方向位置和对应于缺陷位置的候选喷墨。 该方法修改候选喷墨的操作以形成第二墨图像。 该方法识别实际形成第一图像缺陷的第二喷墨，以响应于识别位于第一缺陷附近的第二墨图像中的第二缺陷。 当图像数据与打印机中的喷墨打印机完全不一致时，该方法可以识别和补偿不可操作的喷墨打印机。

公开(公告)号：US20130342706A1

公开(公告)日：2013-12-26

申请号：US13527673

申请日：2012-06-20

申请人： Martin Edward Hoover ,  David Martin Todd Jackson ,  Wencheng Wu ,  Vladimir Kozitsky

发明人： Martin Edward Hoover ,  David Martin Todd Jackson ,  Wencheng Wu ,  Vladimir Kozitsky

IPC分类号： H04N17/02

CPC分类号： G08G1/0175 ,  G06T7/80 ,  G06T2207/10016 ,  G06T2207/30204 ,  G06T2207/30236 ,  H04N17/002

摘要： A method and system for camera calibration comprises configuring a calibration target comprising calibration reflectors on a test vehicle. Video of a test scene is collected. Next the test vehicle is identified as it enters the test scene and recorded as it passes through the test scene. The position of the calibration target in each frame of the video is determined and the corresponding individual position of each calibration reflector for each frame of the recorded frames is used to construct a camera calibration map to calibrate the video camera.

摘要翻译： 用于相机校准的方法和系统包括在测试车辆上配置包括校准反射器的校准目标。 收集测试场景的视频。 接下来，测试车辆被识别为进入测试场景并在通过测试场景时被记录。 确定视频的每个帧中的校准目标的位置，并且使用每个记录帧的每个帧的每个校准反射器的对应的单独位置来构造相机校准映射以校准摄像机。

公开(公告)号：US08605303B2

公开(公告)日：2013-12-10

申请号：US13008557

申请日：2011-01-18

申请人： Wencheng Wu ,  Beilei Xu

发明人： Wencheng Wu ,  Beilei Xu

IPC分类号： G06K15/00

CPC分类号： H04N1/00005 ,  G06K15/027 ,  H04N1/00015 ,  H04N1/00029 ,  H04N1/00076

摘要： A method has been developed for detecting defects in printed images. The method includes operating a printer to print a first printed image and a second image, where the second image is a duplicate of the first printed image. The method further includes generating image data that correspond to the first printed image and the second printed image, and identifying image defects using differences between the image data generated for the first image and the image data generated for the second image.

摘要翻译： 已经开发了用于检测印刷图像中的缺陷的方法。 该方法包括操作打印机以打印第一印刷图像和第二图像，其中第二图像是第一印刷图像的副本。 该方法还包括生成对应于第一打印图像和第二打印图像的图像数据，以及使用为第一图像生成的图像数据和为第二图像生成的图像数据之间的差异来识别图像缺陷。