Measuring device with event-based camera

Abstract

A measuring device with an event-based camera. A surveying device (1, 1'), such as a laser tracker, a total station, a laser scanner or a measuring rod, comprises an event camera (2, 20). Events detected by the camera (2, 20) are used for determining the direction of a target (3, 13) to be surveyed, such as a retroreflector, by means of target radiation (4), and / or determining the camera pose of the camera (2, 20) in the case of visual ranging, for example for the purpose of registering a three-dimensional point cloud and / or determining the position of the surveying device (1, 1'), for examplecomprising a GNSS-based measuring rod (1') of the camera (2, 20).

Description

technical field [0001] The invention relates to a surveying device comprising an event camera and to a method for such a surveying device. Background technique [0002] Many survey devices are known for measuring one or more target points. Well-known modern examples of such surveying devices are laser trackers (that is, surveying devices configured for continuous tracking of a point of interest and determination of the coordinate position of that point), or surveying devices specially tailored for geodetic surveying ( such as laser scanners, tachymeters and total stations). The latter are also known as electronic tachymeters or computerized tachymeters, and include a range of different subsystems for accomplishing survey tasks in a highly automated or automated manner. A geodetic surveying device according to the prior art is described, for example, in EP 1686350 . In this case, the distance and direction or the horizontal and vertical angles of the surveying device, the ...

AI Technical Summary

Problems solved by technology

[0008] The problem here is that the image quality of traditional cameras can be greatly compromised by photometric effects such as high dynamic range or motion blur (especially in poorly lit measurement environments such as tunnels or inside buildings)

Disadvantages about this solution are: firstly, the additional expenditure on the illuminant; secondly, the complex image estimation of the image provided by the image sensor

Since the exposure duration or time interval between two image recordings cannot be shortened arbitrarily - that is, due to the downwardly limited frame rate or frame rate of ATR cameras of the prior art - this problem mainly occurs with very rapidly moving targets and / or close range

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