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    Combined point cloud generation using a stationary laser scanner and a mobile scanner
    3.
    发明授权
    Combined point cloud generation using a stationary laser scanner and a mobile scanner 有权

    公开(公告)号：US11544860B2

    公开(公告)日：2023-01-03

    申请号：US17000145

    申请日：2020-08-21

    Applicant: LEICA GEOSYSTEMS AG

    Inventor： Thomas Mörwald ,  Zoltán Török ,  Bernhard Metzler

    IPC: G06T7/33 ,  G01S17/894 ,  G06T3/40 ,  G06T5/50 ,  G06T19/20

    Abstract: Three-dimensional (3D) point cloud generation using a stationary laser scanner and a mobile scanner. The method includes scanning a first part of a surrounding with the stationary laser scanner, obtaining a first 3D point cloud, scanning a second part of the surrounding with the mobile scanner, obtaining a second 3D point cloud, whereby there is an overlap region of the first part and the second part, and aligning the second 3D point cloud to the first 3D point cloud to form a combined 3D point cloud. The positional accuracy of points of the second 3D point cloud is increased by automatically referencing second scanner data of the overlap region, generated by the mobile scanner, to first scanner data of the overlap region, generated by the stationary laser scanner. Therewith, deformations of the second 3D point cloud and its alignment with the first 3D point cloud are corrected.

    Portable distance measuring device and method for capturing relative positions
    5.
    发明授权
    Portable distance measuring device and method for capturing relative positions 有权

    公开(公告)号：US10162057B2

    公开(公告)日：2018-12-25

    申请号：US15379443

    申请日：2016-12-14

    Applicant: LEICA GEOSYSTEMS AG

    Inventor： Bernhard Metzler ,  Beat Aebischer ,  Knut Siercks ,  Siegfried Wiltsche

    IPC: G01B11/14 ,  G01S17/42 ,  G01S7/481 ,  G01C15/00 ,  G01S17/02 ,  G01S5/16

    Abstract: Some embodiments of the invention relate to a method for capturing a relative position of at least one first spatial point by means of a portable distance measuring device, the method comprising positioning a known reference object, which has known features which may be captured by optical means, said features being arranged in a pattern designed for a resection, at least one first measuring process, comprising measuring a first distance to the first spatial point, and recording a first reference image linked in time with measuring the first distance, the reference object being imaged in the first reference image, and ascertaining the position and orientation of the distance measuring device relative to the reference object comprising identifying the reference object, recalling stored information about the known features of the identified reference object and identifying positions of known features of the reference object in the first reference image.

    Surveying system with image-based measuring
    6.
    发明授权
    Surveying system with image-based measuring 有权

    公开(公告)号：US11566896B2

    公开(公告)日：2023-01-31

    申请号：US16548688

    申请日：2019-08-22

    Applicant: LEICA GEOSYSTEMS AG

    Inventor： Bernhard Richter ,  Zoltán Török ,  Elmar Vincent Van Der Zwan ,  Bernhard Metzler

    IPC: G01C15/00 ,  G01C11/04 ,  G01C1/04 ,  G01C11/02 ,  G01S19/13

    Abstract: A method for image-based point measurement includes moving a surveying system along a path through a surrounding and capturing a series of images of the surrounding. A subset of images are defined as frames and a subset of frames are defined as key-frames. Textures are identified in first and second frames and are tracked in successive frames to generate first and second frame feature lists. A structure from motion algorithm is used to calculate camera poses for the images based on the first and second frame feature lists. Corresponding image points in images of the series of images are identified using feature recognition in at least a plurality of images. Three-dimensional coordinates of the selected image point are determined using forward intersection with the poses of the subset of images in which corresponding image points are identified. The three-dimensional coordinates of the selected image point are presented to the user.

    Method for 2D picture based conglomeration in 3D surveying
    8.
    发明授权
    Method for 2D picture based conglomeration in 3D surveying 有权

    公开(公告)号：US11015930B2

    公开(公告)日：2021-05-25

    申请号：US16197029

    申请日：2018-11-20

    Applicant: LEICA GEOSYSTEMS AG

    Inventor： Bernhard Metzler ,  Tobias Heller ,  Siegfried Wiltsche

    IPC: G01C11/00 ,  G01C11/30 ,  G01C11/02 ,  G06T7/00 ,  H04N5/232

    Abstract: A method for a three dimensional surveying of a 3D-scene for deriving a true-to-size 3D-model. It involves deriving a first 3D-partial-model of a section of the 3D-scene together with a capturing of at least one first 2D-visual-image and a second 3D-partial-model of another section of the 3D-scene, together with a capturing of at least one second 2D-visual-image, wherein the 3D-partial-models are partially overlapping. The first 3D-partial-model is conglomerated with the second 3D-partial-model to form the 3D-model of the 3D-scene, which is done with defining a first line segment in the first 2D-visual-image and a second line segment in the second 2D-visual-image, which first and second line segments are representing a visual feature, which is common in both of the 2D-visual-images. The line segments in the 2D-visual-images are utilized in conglomerating the corresponding 3D-partial models to form the 3D-model of the whole 3D-scene.

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