US 12,266,126 B2
Measuring method and a measuring device for measuring and determining the size and dimension of structures in scene
Lukas Buschle, Tuttlingen (DE); Simon Haag, Tuttlingen (DE); Jasmin Keuser, Tuttlingen (DE); and Benedikt Köhler, Tuttlingen (DE)
Assigned to KARL STORZ SE & Co. KG, Tuttlingen (DE)
Filed by KARL STORZ SE & Co. KG, Tuttlingen (DE)
Filed on Jul. 21, 2022, as Appl. No. 17/870,463.
Claims priority of application No. 10 2021 119 481.4 (DE), filed on Jul. 27, 2021.
Prior Publication US 2023/0032791 A1, Feb. 2, 2023
Int. Cl. G06T 7/571 (2017.01); A61B 1/00 (2006.01); A61B 1/06 (2006.01); G06T 7/593 (2017.01)
CPC G06T 7/571 (2017.01) [A61B 1/00009 (2013.01); A61B 1/0669 (2013.01); G06T 7/593 (2017.01); G06T 2207/10068 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A measuring method comprising:
recording a first image of a scene, wherein recording takes place using an image sensor, in front of which an optical system is arranged, wherein, in the first image, a first plurality of first image points image a corresponding first plurality of first real points of the scene by means of the image sensor and wherein an image start point of the first plurality of first image points defines a real start point in the scene, wherein, when the first image is recorded, a viewing field of the image sensor is located in a first spatial position relative to the scene;
identifying first depth information which describes, at least for a first subset of the first plurality of first image points, including the image start point, a respective distance of a first real point of the first plurality of first real points imaged by a first image point from a reference plane;
recording a second image of the scene, wherein recording takes place using the image sensor, wherein, in the second image, a second plurality of second image points image a corresponding second plurality of second real points of the scene by means of the image sensor and wherein an image end point of the second plurality of second image points defines a real end point in the scene, wherein, when the second image is recorded, the viewing field of the image sensor is located in a second spatial position relative to the scene, which differs from the first spatial position;
identifying second depth information which describes, at least for a second subset of the second plurality of second image points, including the image end point, a respective distance of a second real point of the second plurality of second real points imaged by a second image point from the reference plane;
determining a group of point pairs, which each contain a first image point from the first plurality of first image points and a second image point from the second plurality of second image points, which correspond to one another in such manner that the first and the second image point of a point pair image the same real point;
determining a spatial position change of the viewing field of the image sensor on the basis of the group of point pairs;
calculating measurement result information based on a first position of the image start point on the image sensor, a second position of the image end point on the image sensor, depth information for the image start point and/or the image end point, the imaging properties of the optical system and the spatial position change of the viewing field, wherein the measurement result information is a length or an area in the scene; and
outputting the measurement result information.