Hexagon Technology Center Gmbh

Thomas Fidler

Bernhard Metzler

Knut Siercks

Alexander Velizhev

Roman Parys

Jochen Scheja

Elmar Vincent Van Der Zwan

Andreas Pfister

A system is disclosed that comprises a camera module and a control and evaluation unit. The camera module is designed to be attached to the surveying pole and comprises at least one camera for capturing images. The control and evaluation unit has stored a program with program code so as to control and execute a functionality in which a series of images of the surrounding is captured with the at least one camera; a SLAM-evaluation with a defined algorithm using the series of images is performed, wherein a reference point field is built up and poses for the captured images are determined; and, based on the determined poses, a point cloud comprising 3D-positions of points of the surrounding can be computed by forward intersection using the series of images, particularly by using dense matching algorithm.

Surveying system

A volume determining method for an object on a construction site is disclosed. The method may include moving a mobile camera along a path around the object while orienting the camera repeatedly onto the object. The method may include capturing a series of images of the object from different points on the path and with different orientations with the camera, the series being represented by an image data set; performing a structure from motion evaluation with a defined algorithm using the series of images and generating a spatial representation; scaling the spatial representation with help of given information about a known absolute reference regarding scale; defining a ground surface for the object and applying it onto the spatial representation; and calculating and outputting the absolute volume of the object based on the scaled spatial representation and the defined ground surface.

Method and system for volume determination using a structure from motion algorithm

Some embodiments of the invention include a method for providing a 3D-point cloud using a geodetic surveying instrument. Some embodiments also include an image capturing unit. A method, according to some embodiments may include scanning a surrounding with the surveying instrument according to a defined scanning region with at least partly covering the object and generating a scanning point cloud corresponding to the scanning region with reference to a surveying coordinate system which is defined by the surveying instrument and generating a first image on side of the surveying instrument covering a region basically corresponding to the scanning region, the first image representing a reference image the pose of which is known with reference to the surveying coordinate system due to the position and orientation of the surveying instrument for acquiring data the first image is base on.

Providing a point cloud using a surveying instrument and a camera device

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Dornbirn, Austria

Thomas Fidler