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31. 发明授权

US07426297B2 System and method for real-time whiteboard capture and processing 有权
标题翻译：用于实时白板捕获和处理的系统和方法
公开(公告)号：US07426297B2
公开(公告)日：2008-09-16
申请号：US11689171
申请日：2007-03-21
申请人： Zhengyou Zhang , Liwei He
发明人： Zhengyou Zhang , Liwei He
IPC分类号： G06K9/00
CPC分类号： H04N7/15 , G06F3/017 , G06K9/222 , G06Q10/10 , G06T7/20 , G06T7/90
摘要： A system that captures both whiteboard content and audio signals of a meeting using a video camera and records or transmits them in real-time. The Real-Time Whiteboard Capture captures pen strokes on whiteboards in real time using an off-the-shelf video camera. Unlike many existing tools, the RTWCS does not instrument the pens or the whiteboard. It analyzes the sequence of captured video images in real time, classifies the pixels into whiteboard background, pen strokes and foreground objects (e.g., people in front of the whiteboard), and extracts newly written pen strokes. This allows the RTWCS to transmit whiteboard contents using very low bandwidth to remote meeting participants. Combined with other teleconferencing tools such as voice conference and application sharing, the RTWCS becomes a powerful tool to share ideas during online meetings.
摘要翻译：使用摄像机捕获会议的白板内容和音频信号的系统，并实时记录或传输。实时白板捕获使用现成的摄像机实时捕获白板上的笔划。与许多现有工具不同，RTWCS不会对笔或白板进行仪器仪表。它实时分析拍摄的视频图像的顺序，将像素分类为白板背景，笔画和前景对象（例如，白板前的人物），并提取新写入的笔画。这允许RTWCS使用非常低的带宽将白板内容传输给远程会议参与者。结合其他电话会议工具，如语音会议和应用程序共享，RTWCS成为在线会议期间分享想法的强大工具。

32. 发明申请

US20080168139A1 PERSISTENT COLLABORATIVE FRAMEWORK FOR INTERACTIVE WEB APPLICATIONS 有权
标题翻译：用于交互式WEB应用程序的紧密协作框架
公开(公告)号：US20080168139A1
公开(公告)日：2008-07-10
申请号：US11620658
申请日：2007-01-06
申请人： Sasa Junuzovic , Rajesh Hegde , Li-Wei He , Zhengyou Zhang , Steven Drucker
发明人： Sasa Junuzovic , Rajesh Hegde , Li-Wei He , Zhengyou Zhang , Steven Drucker
IPC分类号： G06F15/16
CPC分类号： H04L67/1095 , H04L67/02 , Y10S707/99931
摘要： A framework for facilitating collaborative interaction between users of a web application is presented. The framework provides persistence and sharing mechanisms for arbitrary application-defined objects. The sharing mechanism is coupled with a consistency mechanism that keeps client states consistent even when users perform conflicting operations. This framework is application-independent in that the persistence, sharing between clients and maintaining a consistent state among the clients is accomplished without the need for specific knowledge of the design of the web application. Thus, web developers can focus on the logic of the application and the UI, instead of spending time designing and implementing collaborative capabilities.
摘要翻译：介绍了一种用于促进Web应用程序用户之间的协作交互的框架。该框架为任意应用程序定义的对象提供持久性和共享机制。共享机制与一致性机制相结合，即使在用户执行冲突操作时也能保持客户端状态的一致性。该框架是独立于应用程序的，因为在客户端之间的持久性，共享和维护一致的状态之间完成了这一任务，而不需要对Web应用程序设计的具体知识。因此，Web开发人员可以专注于应用程序和UI的逻辑，而不是花时间设计和实现协作功能。

33. 发明申请

US20070206878A1 SYSTEM AND METHOD FOR HEAD SIZE EQUALIZATION IN 360 DEGREE PANORAMIC IMAGES 有权
标题翻译：用于360度全景图像中的大小均匀化的系统和方法
公开(公告)号：US20070206878A1
公开(公告)日：2007-09-06
申请号：US11465703
申请日：2006-08-18
申请人： Zicheng Liu , Ross Cutler , Michael Cohen , Zhengyou Zhang
发明人： Zicheng Liu , Ross Cutler , Michael Cohen , Zhengyou Zhang
IPC分类号： G06K9/36
CPC分类号： G06T3/0062 , G06K9/00228 , G06T3/4038 , G06T5/006 , G06T7/30
摘要： A real-time approximately 360 degree image correction system and a method for alleviating distortion and perception problems in images captured by omni-directional cameras. In general, the real-time panoramic image correction method generates a warp table from pixel coordinates of a panoramic image and applies the warp table to the panoramic image to create a corrected panoramic image. The corrections are performed using a parametric class of warping functions that include Spatially Varying Uniform (SVU) scaling functions. The SVU scaling functions and scaling factors are used to perform vertical scaling and horizontal scaling on the panoramic image pixel coordinates. A horizontal distortion correction is performed using the SVU scaling functions at at least two different scaling factors. This processing generates a warp table that can be applied to the panoramic image to yield the corrected panoramic image. In one embodiment the warp table is concatenated with a stitching table used to create the panoramic image.
摘要翻译：一种实时大约360度的图像校正系统和一种减轻全方位摄像机拍摄图像失真和感知问题的方法。通常，实时全景图像校正方法从全景图像的像素坐标生成扭曲表，并将经线表应用于全景图像，以创建校正的全景图像。校正使用包括空间变化均匀（SVU）缩放函数的参数化的翘曲函数类来执行。 SVU缩放函数和缩放因子用于对全景图像像素坐标执行垂直缩放和水平缩放。使用SVU缩放函数以至少两个不同的缩放因子执行水平失真校正。该处理产生可应用于全景图像以产生经校正的全景图像的经向表。在一个实施例中，经线台与用于创建全景图像的缝合台连接。

34. 发明授权

US07260278B2 System and method for real-time whiteboard capture and processing 有权
标题翻译：用于实时白板捕获和处理的系统和方法
公开(公告)号：US07260278B2
公开(公告)日：2007-08-21
申请号：US10804311
申请日：2004-03-19
申请人： Zhengyou Zhang , Liwei He
发明人： Zhengyou Zhang , Liwei He
IPC分类号： G06K9/60
CPC分类号： H04N7/15 , G06F3/017 , G06K9/222 , G06Q10/10 , G06T7/20 , G06T7/90
摘要： A system that captures both whiteboard content and audio signals of a meeting using a video camera and records or transmits them in real-time. The Real-Time Whiteboard Capture captures pen strokes on whiteboards in real time using an off-the-shelf video camera. Unlike many existing tools, the RTWCS does not instrument the pens or the whiteboard. It analyzes the sequence of captured video images in real time, classifies the pixels into whiteboard background, pen strokes and foreground objects (e.g., people in front of the whiteboard), and extracts newly written pen strokes. This allows the RTWCS to transmit whiteboard contents using very low bandwidth to remote meeting participants. Combined with other teleconferencing tools such as voice conference and application sharing, the RTWCS becomes a powerful tool to share ideas during online meetings.
摘要翻译：使用摄像机捕获会议的白板内容和音频信号的系统，并实时记录或传输。实时白板捕获使用现成的摄像机实时捕获白板上的笔划。与许多现有工具不同，RTWCS不会对笔或白板进行仪器仪表。它实时分析拍摄的视频图像的顺序，将像素分类为白板背景，笔画和前景对象（例如，白板前的人物），并提取新写入的笔画。这允许RTWCS使用非常低的带宽将白板内容传输给远程会议参与者。结合其他电话会议工具，如语音会议和应用程序共享，RTWCS成为在线会议期间分享想法的强大工具。

35. 发明授权

US07250965B2 System and method for calibrating a camera with one-dimensional objects 有权
标题翻译：用一维物体校准相机的系统和方法
公开(公告)号：US07250965B2
公开(公告)日：2007-07-31
申请号：US11275457
申请日：2006-01-05
申请人： Zhengyou Zhang
发明人： Zhengyou Zhang
IPC分类号： H04N17/00
CPC分类号： H04N17/002
摘要： Calibration for a camera is achieved by receiving images of a calibration object whose geometry is one-dimension in space. The received images show the calibration object in several distinct positions. Calibration for the camera is then calculated based on the received images of the calibration object.
摘要翻译：相机的校准是通过接收几何为空间一维的校准对象的图像来实现的。接收到的图像显示校准对象在几个不同的位置。然后基于接收到的校准对象的图像来计算相机的校准。

36. 发明授权

US07174035B2 Rapid computer modeling of faces for animation 有权
公开(公告)号：US07174035B2
公开(公告)日：2007-02-06
申请号：US10967765
申请日：2004-10-18
申请人： Zicheng Liu , Zhengyou Zhang , Michael F. Cohen , Charles E. Jacobs
发明人： Zicheng Liu , Zhengyou Zhang , Michael F. Cohen , Charles E. Jacobs
IPC分类号： G06K9/00
CPC分类号： G06T13/40 , G06K9/00201 , G06K9/00248 , G06K9/00268 , G06K9/00281 , G06T7/251 , G06T7/55 , G06T7/579 , G06T7/74 , G06T9/001 , G06T15/205 , G06T17/00 , G06T17/10 , G06T17/20 , G06T2200/08 , G06T2207/10012 , G06T2207/10016 , G06T2207/10021 , G06T2207/30201 , H04N19/162 , H04N19/503
摘要： Described herein is a technique for creating a 3D face model using images obtained from an inexpensive camera associated with a general-purpose computer. Two still images of the user are captured, and two video sequences. The user is asked to identify five facial features, which are used to calculate a mask and to perform fitting operations. Based on a comparison of the still images, deformation vectors are applied to a neutral face model to create the 3D model. The video sequences are used to create a texture map. The process of creating the texture map references the previously obtained 3D model to determine poses of the sequential video images.

37. 发明授权

US07171056B2 System and method for converting whiteboard content into an electronic document 有权
标题翻译：将白板内容转换为电子文档的系统和方法
公开(公告)号：US07171056B2
公开(公告)日：2007-01-30
申请号：US10372488
申请日：2003-02-22
申请人： Zhengyou Zhang , Li-wei He
发明人： Zhengyou Zhang , Li-wei He
IPC分类号： G06K9/36 , G06K9/40
CPC分类号： H04N1/6027 , G06K9/32 , G06K9/42 , G06K2209/01 , G06T5/006 , G06T7/12 , G06T2207/10016 , G06T2207/20061 , H04N1/387 , H04N1/4072
摘要： A system and method of converting the content of a regular whiteboard into an electronic document. This system and method provides an effective, economical and easy to use way to convert whiteboard content as an enhanced and easily editable electronic document though the use of a still or video camera. It uses a series of image processing steps to clip borders, rectify the whiteboard image and correct colors.
摘要翻译：将普通白板的内容转换为电子文档的系统和方法。该系统和方法提供了一种有效，经济且易于使用的方式，通过使用静态或摄像机，将白板内容转换为增强型和易于编辑的电子文档。它使用一系列图像处理步骤来剪切边框，纠正白板图像和正确的颜色。

38. 发明申请

US20060293887A1 Multi-sensory speech enhancement using a speech-state model 有权
标题翻译：使用语态模型的多感官语音增强
公开(公告)号：US20060293887A1
公开(公告)日：2006-12-28
申请号：US11168770
申请日：2005-06-28
申请人： Zhengyou Zhang , Zicheng Liu , Alejandro Acero , Amarnag Subramanya , James Droppo
发明人： Zhengyou Zhang , Zicheng Liu , Alejandro Acero , Amarnag Subramanya , James Droppo
IPC分类号： G10L15/20
CPC分类号： G10L21/0208 , G10L2021/02165
摘要： A method and apparatus determine a likelihood of a speech state based on an alternative sensor signal and an air conduction microphone signal. The likelihood of the speech state is used, together with the alternative sensor signal and the air conduction microphone signal, to estimate a clean speech value for a clean speech signal.
摘要翻译：方法和装置基于替代传感器信号和空气传导麦克风信号确定语音状态的可能性。使用语音状态的可能性以及替代的传感器信号和导气麦克风信号来估计干净的语音信号的清晰的语音值。

39. 发明申请

US20060132869A1 System and Method for Calibrating a Camera With One-Dimensional Objects 有权
标题翻译：使用一维对象校准相机的系统和方法
公开(公告)号：US20060132869A1
公开(公告)日：2006-06-22
申请号：US11275457
申请日：2006-01-05
申请人： Zhengyou Zhang
发明人： Zhengyou Zhang
IPC分类号： H04N1/46
CPC分类号： H04N17/002
摘要： Calibration for a camera is achieved by receiving images of a calibration object whose geometry is one-dimension in space. The received images show the calibration object in several distinct positions. Calibration for the camera is then calculated based on the received images of the calibration object.
摘要翻译：相机的校准是通过接收几何为空间一维的校准对象的图像来实现的。接收到的图像显示校准对象在几个不同的位置。然后基于接收到的校准对象的图像来计算相机的校准。

40. 发明授权

US07020305B2 System and method providing improved head motion estimations for animation 失效
公开(公告)号：US07020305B2
公开(公告)日：2006-03-28
申请号：US09731481
申请日：2000-12-06
申请人： Zicheng Liu , Zhengyou Zhang
发明人： Zicheng Liu , Zhengyou Zhang
IPC分类号： G06K9/00
CPC分类号： G06K9/00248 , G06T7/251 , G06T7/70 , G06T2207/10016 , G06T2207/30201
摘要： The system provides improved procedures to estimate head motion between two images of a face. Locations of a number of distinct facial features are identified in two images. The identified locations can correspond to the eye comers, mouth corners and nose tip. The locations are converted into as a set of physical face parameters based on the symmetry of the identified distinct facial features. The set of physical parameters reduces the number of unknowns as compared to the number of equations used to determine the unknowns. An initial head motion estimate is determined by: (a) estimating each of the set of physical parameters, (b) estimating a first head pose transform corresponding to the first image, and (c) estimating a second head pose transform corresponding to the second image. The head motion estimate can be incorporated into a feature matching algorithm to refine the head motion estimation and the physical facial parameters. In one implementation, an inequality constraint is placed on a particular physical parameter—such as a nose tip, such that the parameter is constrained within a predetermined minimum and maximum value. The inequality constraint is converted to an equality constraint by using a penalty function. Then, the inequality constraint is used during the initial head motion estimation to add additional robustness to the motion estimation.

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