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    System and method for determining a displaced substrate with a vision system
    3.
    发明授权
    System and method for determining a displaced substrate with a vision system 有权
    用于利用视觉系统确定置换的衬底的系统和方法

    公开(公告)号：US09554094B1

    公开(公告)日：2017-01-24

    申请号：US13796726

    申请日：2013-03-12

    Applicant: Cognex Corporation

    Inventor： Gilbert Chiang ,  Robert Tremblay

    IPC: H04N7/18

    CPC classification number: H04N7/18 ,  G06T7/0004 ,  G06T2207/30141

    Abstract: A system and method for detecting and/or determining the existence of displacement of a substrate with respect to a surrounding object uses a laser line that is free of contact with the object and that is received by an image sensor. A processor reads the line information in a series of image frames, and generates a range image with height information. The height information is provided to a 2D map. Differences between adjacent height measurements, and averages, are computed. Vision system tools are used to accurately locate features in the image and these are aligned with the height information. The height differences are interpreted, with missing height data due, for example, to specularity in the image being approximated. The height differences are compared to predetermined height parameters relative to identified locations, for example, wells, in the object to determine whether a substrate is displaced.

    Abstract translation: 用于检测和/或确定衬底相对于周围物体的位移的存在的系统和方法使用与物体无接触并由图像传感器接收的激光线。 处理器读取一系列图像帧中的行信息，并生成具有高度信息的范围图像。 高度信息被提供给2D地图。 计算相邻高度测量值和平均值之间的差异。 视觉系统工具用于准确定位图像中的特征，并与高度信息对齐。 解释高度差异，缺少高度数据，例如由于近似于图像中的镜面反射。 将高度差与相对于物体中的识别位置（例如，井）的预定高度参数进行比较，以确定衬底是否被移位。

    SYSTEM AND METHOD FOR REFINING DIMENSIONS OF A GENERALLY CUBOIDAL 3D OBJECT IMAGED BY 3D VISION SYSTEM AND CONTROLS FOR THE SAME
    6.
    发明申请
    SYSTEM AND METHOD FOR REFINING DIMENSIONS OF A GENERALLY CUBOIDAL 3D OBJECT IMAGED BY 3D VISION SYSTEM AND CONTROLS FOR THE SAME 有权

    公开(公告)号：US20220358668A1

    公开(公告)日：2022-11-10

    申请号：US17745087

    申请日：2022-05-16

    Applicant: Cognex Corporation

    Inventor： Nitin M. Vaidya ,  Hongwei Zhu ,  Daniel Moreno ,  Ben R. Carey ,  Nickolas J. Mullan ,  Gilbert Chiang ,  Yukang Liu ,  David J. Michael

    IPC: G06T7/62 ,  G06T7/64

    Abstract: A system and method for estimating dimensions of an approximately cuboidal object from a 3D image of the object acquired by an image sensor of the vision system processor is provided. An identification module, associated with the vision system processor, automatically identifies a 3D region in the 3D image that contains the cuboidal object. A selection module, associated with the vision system processor, automatically selects 3D image data from the 3D image that corresponds to approximate faces or boundaries of the cuboidal object. An analysis module statistically analyzes, and generates statistics for, the selected 3D image data that correspond to approximate cuboidal object faces or boundaries. A refinement module chooses statistics that correspond to improved cuboidal dimensions from among cuboidal object length, width and height. The improved cuboidal dimensions are provided as dimensions for the object. A user interface displays a plurality of interface screens for setup and runtime operation.

    SYSTEM AND METHOD FOR THREE-DIMENSIONAL SCAN OF MOVING OBJECTS LONGER THAN THE FIELD OF VIEW
    8.
    发明申请
    SYSTEM AND METHOD FOR THREE-DIMENSIONAL SCAN OF MOVING OBJECTS LONGER THAN THE FIELD OF VIEW 有权

    公开(公告)号：US20210350496A1

    公开(公告)日：2021-11-11

    申请号：US17179294

    申请日：2021-02-18

    Applicant: Cognex Corporation

    Inventor： Ben R. Carey ,  Andrew Parrett ,  Yukang Liu ,  Gilbert Chiang

    IPC: G06T1/00 ,  G06T7/00 ,  G06K9/00 ,  G06T7/80 ,  G06T7/246 ,  G06T7/292

    Abstract: This invention provides a system and method for using an area scan sensor of a vision system, in conjunction with an encoder or other knowledge of motion, to capture an accurate measurement of an object larger than a single field of view (FOV) of the sensor. It identifies features/edges of the object, which are tracked from image to image, thereby providing a lightweight way to process the overall extents of the object for dimensioning purposes. Logic automatically determines if the object is longer than the FOV, and thereby causes a sequence of image acquisition snapshots to occur while the moving/conveyed object remains within the FOV until the object is no longer present in the FOV. At that point, acquisition ceases and the individual images are combined as segments in an overall image. These images can be processed to derive overall dimensions of the object based on input application details.

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