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公开(公告)号：US20170257572A1
公开(公告)日：2017-09-07
申请号：US15058660
申请日：2016-03-02
Applicant: Xerox Corporation
Inventor： Hao Wu , Howard Mizes , Wencheng Wu , Graham Pennington , Rakesh Kulkarni
CPC classification number: H04N5/23254 , G06K9/00765 , G06K9/00785 , G06K9/209 , G06T5/003 , G06T5/50 , G06T7/174 , G06T7/215 , G06T7/33 , G06T2207/10016 , G06T2207/10024 , H04N5/23267
Abstract: A method, system, and apparatus for video frame alignment comprises collecting video data comprising at least two video frames; extracting a line profile along at least one line profile in each of the at least two video frames; selecting one of the at least two video frames as a reference video frame; segmenting each of the at least one line profiles into a plurality of segmented line profile group segments; aligning the plurality of segmented line profiles with the segmented line profiles in the reference video frame; translating each of the at least two video frames for each of the plurality of corresponding segmented line profile alignments; and removing a camera shift from the at least two video frames according to the translation and alignment of the plurality of segmented line profiles with the plurality of segmented line profile in the reference video frame.
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2.发明授权System and method for seat occupancy detection from ceiling mounted camera using robust adaptive threshold criteria 有权使用稳健的自适应阈值标准，从吊顶摄像头进行座椅占用检测的系统和方法公开(公告)号：US09378421B2
公开(公告)日：2016-06-28
申请号：US14673943
申请日：2015-03-31
Applicant: Xerox Corporation
Inventor： Robert P. Loce , Waqas Sultani , Hao Wu , Beilei Xu
CPC classification number: G06K9/00624 , G06K9/00342 , G06K9/00771 , G06K9/00838 , G06K9/3233 , G06K9/46 , G06K9/4642 , G06K9/4652 , G06K9/52 , G06K9/6212 , G06K9/6215 , G06K9/6267 , G06K2009/4666
Abstract: A method for detecting sitting behavior includes acquiring a sequence of frames capturing a scene-of-interest at an overhead view. The method includes detecting at least one empty seat within the scene-of-interest and associating the seat as being unoccupied and the frame as a reference frame. The method includes extracting reference features describing a region of the unoccupied seat in the reference frame and quantifying the reference features to form a reference feature vector. The method includes extracting features describing the region in a given frame and quantifying the features to form a current feature vector. The method includes measuring a change in a feature vector over time using the reference feature vector and the current feature vector. The method includes and determining a status of the seat in the given frame as being one of occupied and unoccupied based on the change in the feature vector.
Abstract translation: 用于检测坐姿行为的方法包括获取在俯视图处拍摄感兴趣场景的帧序列。 所述方法包括：检测所述兴趣场景内的至少一个空座位，并将所述座椅未被占用并将所述框架作为参考框架。 该方法包括提取描述参考帧中的空闲座位的区域的参考特征并量化参考特征以形成参考特征向量。 该方法包括提取描述给定帧中的区域的特征并量化特征以形成当前特征向量。 该方法包括使用参考特征向量和当前特征向量来测量特征向量随时间的变化。 该方法包括并且基于特征向量的改变将给定帧中的座席的状态确定为被占用和未占用之一。
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公开(公告)号：US09852631B2
公开(公告)日：2017-12-26
申请号：US15060830
申请日：2016-03-04
Applicant: Xerox Corporation
Inventor： Graham Pennington , Hao Wu , Howard Mizes , Wencheng Wu , Rakesh Kulkarni
CPC classification number: G08G1/147 , G06K9/00771 , G06K9/00812 , G06K9/3208 , G06K9/4604 , G08G1/142 , G08G1/144 , G08G1/146
Abstract: A method, system, and apparatus for parking occupancy detection comprises collecting video of a blockface with at least one video recording module, identifying a number of possible parking spaces along the blockface in the collected video, defining, a region of interest for each of the possible parking spaces, detecting a time dependent occupancy of the defined regions of interest for each of the possible parking spaces, and reporting the time dependent occupancy. Drift correction of the recorded video and ground truth comparisons of occupancy determinations may be provided.
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公开(公告)号：US20170243057A1
公开(公告)日：2017-08-24
申请号：US15283663
申请日：2016-10-03
Applicant: Xerox Corporation
Inventor： Hao Wu , Beilei Xu , Wencheng Wu , Robert P. Loce
CPC classification number: G06K9/00348 , A61B5/112 , A61B5/1128 , A61B5/117 , A61B5/7235 , A61B5/7275 , G06K9/00342 , G06K9/00362 , G06K9/00885 , G06K9/4604 , G06K9/6202 , G06T7/11 , G06T7/20 , G06T7/246 , G06T7/285 , G06T2207/10004 , G06T2207/20164 , G06T2207/30196
Abstract: A computer-implemented system and method for gait analysis of a subject. The method includes obtaining visual data from an image capture device positioned in front of or behind the subject, the plurality of image frames capturing at least one gait cycle of the gait of the subject, detecting one or more prescribed features within the plurality of image frames, analyzing each of the plurality of image frames to detect cross-frame stability of the one or more prescribed features, and segmenting the gait of the subject into at least one gait cycle based at least in part on the detected cross-frame stability of the one or more prescribed features.
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公开(公告)号：US09687189B2
公开(公告)日：2017-06-27
申请号：US14707153
申请日：2015-05-08
Applicant: Xerox Corporation
Inventor： Faezeh Tafazzoli , Beilei Xu , Hao Wu , Robert P Loce
CPC classification number: A61B5/4082 , A61B5/1128 , A61B5/7264 , G06F19/00 , G06K9/00355 , G06K9/00744 , G06K9/3233
Abstract: A system and method for assessing patient movement for Parkinson's disease includes capturing a video of a subject performing a finger tapping sequence comprising a predetermined number of open and close periods. According to an exemplary embodiment, a system and method includes extracting a region of interest for each frame of the video and generating a projection of the region of interest for each frame of the video using perpendicular vector projections in a direction or plurality of directions.
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Patent Agency Ranking
公开(公告)号：US09672434B2
公开(公告)日：2017-06-06
申请号：US14805608
申请日：2015-07-22
Applicant: Xerox Corporation
Inventor： Hao Wu , Robert P. Loce , Yao Rong Wang
CPC classification number: G06K9/00812 , G06K9/00751 , G06K9/00771 , G06K9/4652 , G06K9/4661 , G06K9/52 , G06T5/00
Abstract: A spatiotemporal system and method for parking occupancy detection. The system can generally include suitable image acquisition, processing, transmission and data storage devices configured to carry out the method which includes generating and processing spatiotemporal images to detect the presence of an object in a region of interest, such as a vehicle in a parking stall.
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7.发明授权System and method for detecting settle down time using computer vision techniques 有权使用计算机视觉技术检测沉降时间的系统和方法公开(公告)号：US09384396B2
公开(公告)日：2016-07-05
申请号：US14673990
申请日：2015-03-31
Applicant: Xerox Corporation
Inventor： Robert P. Loce , Waqas Sultani , Hao Wu , Beilei Xu , Thomas F. Wade , Mary Ann Sprague , Patricia Swenton-Wall , Megan Clar , Eric Harte
CPC classification number: G06K9/00624 , G06K9/00342 , G06K9/00771 , G06K9/00838 , G06K9/3233 , G06K9/46 , G06K9/4642 , G06K9/4652 , G06K9/52 , G06K9/6212 , G06K9/6215 , G06K9/6267 , G06K2009/4666
Abstract: A method for detecting settle-down time in a space includes acquiring a sequence of frames capturing a select space from a first camera. The method includes determining an initial time for computing a duration it takes for an associated occupant to settle into a seat in the select space. The method includes determining one or more candidate frames from the sequence of frames where one or both of a sitting behavior and seat occupancy is observed at the seat. The method includes determining a final frame and a final time associated with the final frame from the one or more candidate frames. The method includes computing the settle-down time using the initial and the final times.
Abstract translation: 用于检测空间中的稳定时间的方法包括从第一相机获取捕获选择空间的帧序列。 该方法包括确定用于计算相关乘客在选择空间中的座位中所需的持续时间的初始时间。 该方法包括从在座椅上观察到坐姿和座位占有率中的一个或两个的帧序列确定一个或多个候选帧。 该方法包括从一个或多个候选帧确定最终帧和与最终帧相关联的最后时间。 该方法包括使用初始和最终时间来计算安定时间。
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公开(公告)号：US20170238846A1
公开(公告)日：2017-08-24
申请号：US15283629
申请日：2016-10-03
Applicant: Xerox Corporation
Inventor： Beilei Xu , Hao Wu , Wencheng Wu , Robert P. Loce
CPC classification number: G06K9/00348 , A61B5/112 , A61B5/1128 , A61B5/117 , A61B5/7235 , A61B5/7275 , G06K9/00342 , G06K9/00362 , G06K9/00885 , G06K9/4604 , G06K9/6202 , G06T7/11 , G06T7/20 , G06T7/246 , G06T7/285 , G06T2207/10004 , G06T2207/20164 , G06T2207/30196
Abstract: A method for gait analysis of a subject performed periodically over time to detect changes in one or more gait characteristics. The method includes detecting and identifying a subject and analyzing the gait of the subject on a plurality of occasions. Analyzing the gait of the subject includes, a detecting body parts, generating a joint model depicting the location of the at least one joint in each of the at least two frames, using the joint model to segment a gait cycle for the at least one joint, and comparing the gait cycle to a threshold value to detect abnormal gait.
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公开(公告)号：US20170024619A1
公开(公告)日：2017-01-26
申请号：US14805608
申请日：2015-07-22
Applicant: Xerox Corporation
Inventor： Hao Wu , Robert P. Loce , Yao Rong Wang
CPC classification number: G06K9/00812 , G06K9/00751 , G06K9/00771 , G06K9/4652 , G06K9/4661 , G06K9/52 , G06T5/00
Abstract: A spatiotemporal system and method for parking occupancy detection. The system can generally include suitable image acquisition, processing, transmission and data storage devices configured to carry out the method which includes generating and processing spatiotemporal images to detect the presence of an object in a region of interest, such as a vehicle in a parking stall.
Abstract translation: 一种用于停车占用检测的时空系统和方法。 该系统通常可以包括合适的图像获取，处理，传输和数据存储设备，其被配置为执行该方法，该方法包括生成和处理时空图像以检测感兴趣区域中的对象的存在，例如停车位中的车辆 。
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公开(公告)号：US09396553B2
公开(公告)日：2016-07-19
申请号：US14254360
申请日：2014-04-16
Applicant: Xerox Corporation
Inventor： Zhigang Fan , Hao Wu , Yao Rong Wang
CPC classification number: G06T7/602 , G06K9/00791 , G06K9/52 , G06T7/60 , G06T7/73 , G06T2207/10016 , G06T2207/20021 , G06T2207/30236 , G06T2207/30248 , G06T2210/12
Abstract: A method and system for determining one or more dimension estimations for a vehicle. A sequence of image frames of a vehicle is received, and a digital representation of the vehicle is extracted from each image in the sequence of image frames. A bounding box is determined for the vehicle based upon the extracted digital representation for each digital representation of the vehicle and at least one dimension of the vehicle is estimated based upon the determined bounding box. An indication of the at least one estimated dimension is output. The indication of at least one estimated dimension is transferred as an input to a comparison technique for further processing the indication of the at least one estimated dimension. The comparison technique can include a parking determination process configured to determine a recommended spot for the vehicle based upon the indication of the at least one estimated dimension.
Abstract translation: 一种用于确定车辆的一个或多个维度估计的方法和系统。 接收车辆的一系列图像帧，并且从图像帧序列中的每个图像中提取车辆的数字表示。 基于车辆的每个数字表示的提取的数字表示，为车辆确定边界框，并且基于所确定的边界框来估计车辆的至少一个维度。 输出至少一个估计尺寸的指示。 将至少一个估计维度的指示作为输入传送到比较技术，以进一步处理至少一个估计维度的指示。 比较技术可以包括停车确定过程，其被配置为基于至少一个估计维度的指示来确定车辆的推荐点。
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