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    3D CALIBRATION METHOD AND APPARATUS FOR MULTI-VIEW PHASE SHIFT PROFILOMETRY
    2.
    发明公开
    3D CALIBRATION METHOD AND APPARATUS FOR MULTI-VIEW PHASE SHIFT PROFILOMETRY 审中-实审

    公开(公告)号：EP4372310A1

    公开(公告)日：2024-05-22

    申请号：EP23209635.4

    申请日：2023-11-14

    申请人： Korea Advanced Institute of Science and Technology ,  Mirtec Co., Ltd.

    发明人： Kim, Min Hyuk ,  Cho, Hyeongjun

    IPC分类号： G01B11/25

    CPC分类号： G01B11/2504 ,  G01B11/2545

    摘要： Disclosed is a three-dimensional (3D) calibration method and device for multi-view phase shift profilometry. A 3D calibration method for multi-view phase shift profilometry, performed by a computer device, according to an example embodiment may include acquiring a phase that is data required for 3D reconstruction from parameters of at least one camera and a projector based on a phase measuring profilometry (PMP) method; defining a phase-to-depth function for each camera-and-projector combination and performing calibration of optimizing the parameters of the camera and the projector; and acquiring a point cloud that includes depth information using the optimized parameters of the camera and the projector.

    VORRICHTUNG ZUM GENERIEREN EINES DREIDIMENSIONALEN ABBILDES
    6.
    发明公开
    VORRICHTUNG ZUM GENERIEREN EINES DREIDIMENSIONALEN ABBILDES 审中-公开

    公开(公告)号：EP3362764A1

    公开(公告)日：2018-08-22

    申请号：EP16794920.5

    申请日：2016-10-13

    申请人： 3D Elements GmbH

    发明人： HOFHERR, Georg ,  BÜRGLER, Manuel ,  MÖLSCHL, Lukas

    IPC分类号： G01B11/25 ,  G06K9/20

    CPC分类号： G01B11/2545 ,  G06K9/2018 ,  G06K2209/40

    摘要： The invention relates to a device (1) for generating a three-dimensional representation of a body (2) having a texture and a volume, comprising a first group of cameras (3) for detecting image data in the visual range, a second group of cameras (4) for detecting image data in the infrared range and/or another non-visible range, in particular in the UV range, and comprising an illumination device (5) having at least one projector (6) for generating light in the infrared range and/or another non-visible range, in particular in the UV range, and having a data processing device (7) via which the cameras (3) of the first group, the cameras (4) of the second group and the at least one projector (6) can be controlled, and to which the image data of the cameras (3, 4) of the first and second groups can be supplied, wherein the texture of at least one part of the body (2) can be calculated from the image data of the cameras (3) of the first group, and wherein a processor (8) is provided which calculates a three-dimensional volume model substantially of the entire body (2) from the image data of the cameras (4) of the second group.

    DETERMINING OBJECT REFLECTION PROPERTIES WITH RESPECT TO PARTICULAR OPTICAL MEASUREMENT
    8.
    发明公开
    DETERMINING OBJECT REFLECTION PROPERTIES WITH RESPECT TO PARTICULAR OPTICAL MEASUREMENT 审中-公开
    确定与特定光学测量有关的物体反射特性

    公开(公告)号：EP3258211A1

    公开(公告)日：2017-12-20

    申请号：EP16174909.8

    申请日：2016-06-17

    申请人： Hexagon Technology Center GmbH

    发明人： STIGWALL, Johan ,  JENSEN, Thomas

    IPC分类号： G01B11/25 ,  G06T7/00

    CPC分类号： G06T7/40 ,  G01B11/005 ,  G01B11/2518 ,  G01B11/2545 ,  G06T7/11 ,  G06T7/521 ,  G06T7/55 ,  G06T7/593 ,  G06T7/74 ,  G06T2207/10028 ,  G06T2207/20021 ,  G06T2207/30244 ,  H04N5/2256

    摘要： Method of identifying a surface point or region (14,15) of an object to be measured of particular measuring properties for optical measurement of the respective point or region (14,15) by means of an optical sensor (10), the optical sensor (10) providing defined measuring conditions at least regarding emission of measuring light and reception of reflected measuring light in a defined spatial relationship. The method comprises defining a point or region (14,15) of interest of the object, determining an optical property of the defined point or of the defined region (14,15) with respect to a desired optical measurement and deriving an object information base on the optical property. The determination of the optical property is performed by optically pre-measuring the point or region (14,15) using the optical sensor (10) by illuminating the point or the region (14,15) with the measuring light, capturing at least one image by means of the optical sensor (10) of at least one illumination (Lr,Li) at the object and analysing respective illuminations (Lr,Li) regarding position and/or appearance plausibility with respect to the measuring conditions of the optical sensor (10); alternatively or additionally analysing a digital model of the object to be measured by digitally aligning the digital model in accordance with an orientation of the object relative to the optical sensor (10) and determining reflectivity properties of the point or region (14,15) based on the aligned model regarding an illumination with the measuring light in the orientation of the object relative to the optical sensor.

    摘要翻译： 通过光学传感器（10）识别用于对相应点或区域（14,15）进行光学测量的特定测量属性的待测量对象的表面点或区域（14,15）的方法，光学传感器 （10）提供限定的测量条件，至少关于测量光的发射和以限定的空间关系接收反射的测量光。 该方法包括定义对象的感兴趣的点或区域（14,15），确定所定义的点或定义的区域（14,15）相对于期望的光学测量的光学属性并且导出对象信息库 对光学性质。 通过用测量光照亮点或区域（14,15），使用光学传感器（10）以光学方式预先测量点或区域（14,15）来执行光学性质的确定，从而捕获至少一个 借助于所述光学传感器（10）对所述物体处的至少一个照明（Lr，Li）的图像进行分析，并分析关于所述光学传感器的测量条件的位置和/或外观合理性的各个照明（Lr，Li） 10）; 备选地或附加地根据物体相对于光学传感器（10）的取向通过数字对准数字模型并且确定基于点或区域（14,15）的反射率性质来分析待测量的物体的数字模型 在关于利用测量光照射对象相对于光学传感器的方位的对准模型上。

    METHOD FOR CORRECTING SURFACE SHAPE DATA OF ANNULAR ROTOR, AND DEVICE FOR INSPECTING APPEARANCE OF ANNULAR ROTOR
    9.
    发明公开
    METHOD FOR CORRECTING SURFACE SHAPE DATA OF ANNULAR ROTOR, AND DEVICE FOR INSPECTING APPEARANCE OF ANNULAR ROTOR 审中-公开

    公开(公告)号：EP3171128A4

    公开(公告)日：2017-12-20

    申请号：EP15809217

    申请日：2015-06-15

    申请人： BRIDGESTONE CORP

    发明人： TAKEBUCHI TARO

    IPC分类号： G01B11/24 ,  G01N21/95

    CPC分类号： G01B11/2522 ,  G01B11/24 ,  G01B11/2545 ,  G01M17/021 ,  G01M17/027 ,  G01N21/95

    摘要： In order to provide a method for accurately correcting surface shape data of an annular rotating body, in correcting three-dimensional shape data on a surface of the annular rotating body, a reference line is set along the surface to be detected of the annular rotating body, and then reference equiangular division points, which divide the reference line by equal angles, are set. Next the circumferential length of the reference line is calculated from the distance between adjacent reference equiangular division points, and a plurality of reference equidistant division points, which divide the reference line into equal lengths, are set on the reference line, using the circumferential length. Then interpolation points for correction of the data on the surface to be detected of the annular rotating body are set at positions a preset distance apart in the radial direction of the rotating body from the reference equidistant division points. Then three-dimensional shape data at the interpolation points are calculated using the three-dimensional data to be corrected. Finally the interpolation points are moved onto a perfect circle centered about the rotational center and having the same circumferential length as the aforementioned circumferential length, using the aforementioned circumferential length and the distance.