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    Method and device for recognizing dangerousness of object
    1.
    发明授权
    Method and device for recognizing dangerousness of object 有权

    公开(公告)号：US09805249B2

    公开(公告)日：2017-10-31

    申请号：US14926042

    申请日：2015-10-29

    Applicant: Zhongwei Cheng ,  Shengyin Fan

    Inventor： Zhongwei Cheng ,  Shengyin Fan

    IPC: G06K9/00

    CPC classification number: G06K9/00201 ,  G06K9/00771

    Abstract: Disclosed is an object dangerousness recognition method comprising steps of generating, based on an image captured by a stereo camera, a heterogeneous point cloud of an object in the image, each point in the heterogeneous point cloud having depth information and planar image information; determining, based on the depth information and the planar image information of each point in the heterogeneous point cloud, a solid shape of the object, and then, generating a first dangerousness parameter according to the solid shape; determining, based on the depth information and the planar image information of each point in the heterogeneous point cloud, a surface feature of the object, and then, generating a second dangerousness parameter according to the surface feature; and generating, based on the first and second dangerousness parameters, a comprehensive dangerousness parameter of the object.

    Method and apparatus for detecting persons, and non-transitory computer-readable recording medium
    4.
    发明授权
    Method and apparatus for detecting persons, and non-transitory computer-readable recording medium 有权

    公开(公告)号：US09984286B2

    公开(公告)日：2018-05-29

    申请号：US15148391

    申请日：2016-05-06

    Applicant: Xin Wang ,  Shengyin Fan ,  Qian Wang ,  Jiadan Zhu

    Inventor： Xin Wang ,  Shengyin Fan ,  Qian Wang ,  Jiadan Zhu

    IPC: G06K9/00 ,  G06K9/62 ,  G06T7/00

    CPC classification number: G06K9/00369 ,  G06K9/00778

    Abstract: A method and an apparatus for detecting persons are disclosed. The method includes initially detecting the persons in a height-top-view; dividing the height-top-view into one or more regions, and estimating crowd density in each region; determining, based on the crowd density, visible regions of the initially detected persons in each of the regions; for each of the initially detected persons, extracting a first gradient feature and a second gradient feature of the person from the height-top-view, and a grayscale image or a color image corresponding to the height-top-view, respectively; for each of the initially detected persons, determining, based on the extracted first gradient feature and second gradient feature, using a previously constructed classifier corresponding to the determined visible region of the person, a confidence level of the initially detected person; and correcting, based on the confidence level, a detection result of the initially detected persons.

    METHOD AND APPARATUS FOR DETECTING OBJECT
    7.
    发明申请
    METHOD AND APPARATUS FOR DETECTING OBJECT 有权
    检测对象的方法和装置

    公开(公告)号：US20140177915A1

    公开(公告)日：2014-06-26

    申请号：US14133895

    申请日：2013-12-19

    Applicant: Shengyin Fan ,  Xin Wang

    Inventor： Shengyin Fan ,  Xin Wang

    IPC: G06T7/20 ,  G06T7/00

    CPC classification number: G06T7/11 ,  G06T7/174 ,  G06T7/194 ,  G06T7/248 ,  G06T7/277 ,  G06T7/285 ,  G06T7/593 ,  G06T7/74 ,  G06T2207/10021 ,  G06T2207/10028 ,  G06T2207/30196 ,  G06T2207/30232 ,  G06T2207/30241

    Abstract: A method and an apparatus for detecting an object are disclosed. The method comprises the steps of obtaining a plurality of depth images of the object; extracting foregrounds; fusing the foregrounds in a unified three-dimensional world coordinate system; calculating an appearance two-dimensional histogram from the fused foreground by the following steps of dividing the foreground into vertical members and getting statistics of the numbers of foreground points in the vertical members so as to obtain the appearance two-dimensional histogram; determining an overlapping region and the number of overlaps based on the placement of stereo cameras; determining a detection parameter relating to a detection position based on the overlapping region and the number of overlaps; and detecting the object by the appearance two-dimensional histogram based on the determined detection parameter.

    Abstract translation: 公开了一种用于检测物体的方法和装置。 该方法包括以下步骤：获得对象的多个深度图像; 提取前景 将前景融合在统一的三维世界坐标系中; 通过以下步骤计算来自融合前景的外观二维直方图，将前景划分成垂直成员并得到垂直成员中的前景点数量的统计，以获得外观二维直方图; 基于立体相机的放置确定重叠区域和重叠数; 基于重叠区域和重叠次数来确定与检测位置有关的检测参数; 以及基于所确定的检测参数，通过出现的二维直方图来检测对象。

    Method, device, and computer-readable medium of object detection
    8.
    发明授权
    Method, device, and computer-readable medium of object detection 有权
    物体检测的方法，设备和计算机可读介质

    公开(公告)号：US08401232B2

    公开(公告)日：2013-03-19

    申请号：US13095128

    申请日：2011-04-27

    Applicant: Shengyin Fan ,  Hong Yi ,  Yu Deng ,  Xin Wang

    Inventor： Shengyin Fan ,  Hong Yi ,  Yu Deng ,  Xin Wang

    IPC: G06K9/00

    CPC classification number: G06K9/00771 ,  G06T7/215 ,  G06T7/277 ,  G06T2207/10016 ,  G06T2207/20076 ,  G06T2207/30196

    Abstract: Disclosed are an object detection method and an object detection device. The object detection method comprises a step of obtaining plural detection results of a current frame according to plural object detection methods; a step of setting initial probabilities of the plural detection results of the current frame; a step of calculating a movement frequency distribution diagram representing movement frequencies of respective pixels in the current frame; a step of obtaining detection results of a previous frame; a step of updating the probabilities of the plural detection results of the current frame; and a step of determining a final list of detected objects based on the updated probabilities of the plural detection results of the current frame.

    Abstract translation: 公开了一种物体检测方法和物体检测装置。 物体检测方法包括根据多个物体检测方法获得当前帧的多个检测结果的步骤; 设定当前帧的多个检测结果的初始概率的步骤; 计算表示当前帧中的各个像素的移动频率的移动频率分布图的步骤; 获取前一帧的检测结果的步骤; 更新当前帧的多个检测结果的概率的步骤; 以及基于当前帧的多个检测结果的更新概率来确定检测对象的最终列表的步骤。

    Method and apparatus for detecting abnormal situation
    9.
    发明授权
    Method and apparatus for detecting abnormal situation 有权

    公开(公告)号：US10032082B2

    公开(公告)日：2018-07-24

    申请号：US15143718

    申请日：2016-05-02

    Applicant: Bo Pang ,  Shengyin Fan ,  Xin Wang ,  Qian Wang ,  Gang Wang

    Inventor： Bo Pang ,  Shengyin Fan ,  Xin Wang ,  Qian Wang ,  Gang Wang

    IPC: G06K9/00

    Abstract: A method and an apparatus for detecting an abnormal situation are disclosed. The method includes recognizing whether a detection target exists in a captured image; generating, based on the captured image, a three-dimensional point cloud of the detection target in the captured image, when the detection target exists; obtaining, based on the generated three-dimensional point cloud, one or more current posture features of the detection target; and determining, based on the current posture features and one or more predetermined posture feature standards, whether the abnormal situation exists, the posture feature standards being previously determined based on one or more common features when the detection target performs a plurality of abnormal actions.

    METHOD AND DEVICE FOR DETECTING GATHERING OF OBJECTS BASED ON STEREO VISION AS WELL AS NON-TRANSITORY COMPUTER-READABLE MEDIUM
    10.
    发明申请
    METHOD AND DEVICE FOR DETECTING GATHERING OF OBJECTS BASED ON STEREO VISION AS WELL AS NON-TRANSITORY COMPUTER-READABLE MEDIUM 有权
    用于基于立体视觉检测物体的方法和装置，作为非接线计算机可读介质

    公开(公告)号：US20160335491A1

    公开(公告)日：2016-11-17

    申请号：US15151940

    申请日：2016-05-11

    Applicant: Qian Wang ,  Shengyin Fan ,  Xin Wang ,  Gang Qiao ,  Jiadan Zhu

    Inventor： Qian Wang ,  Shengyin Fan ,  Xin Wang ,  Gang Qiao ,  Jiadan Zhu

    IPC: G06K9/00 ,  G06T7/20 ,  G06T7/00

    CPC classification number: G06K9/00369 ,  G06K9/00778

    Abstract: Method, device, and non-transitory computer-readable medium detecting a gathering of objects based on stereo vision are disclosed, and the method comprises steps of obtaining current and prior images and a corresponding depth map; extracting foreground pixels corresponding to detection objects from the current and prior images, and projecting the foreground pixels onto a ground surface to acquire a foreground projection image including foreground projection blocks; conducting, based on image feature differences of the foreground pixels between the current and prior images, projection onto the ground surface to acquire moving foreground projection blocks; utilizing the moving foreground projection blocks to erode the foreground projection blocks to obtain still foreground projection blocks; and determining, based on the still foreground projection blocks, whether the gathering of objects exists.

    Abstract translation: 公开了基于立体视觉检测物体聚集的方法，装置和非暂时计算机可读介质，并且该方法包括获取当前和先前图像以及对应的深度图的步骤; 从当前和先前图像中提取与检测对象相对应的前景像素，并将前景像素投影到地面上以获取包括前景投影块的前景投影图像; 基于当前和先前图像之间的前景像素的图像特征差异进行投影，以投影到地面上以获取移动的前景投影块; 利用移动的前景投影块来侵蚀前景投影块以获得静止的前景投影块; 以及基于所述静止前景投影块来确定是否存在对象的聚集。

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