US 11,954,766 B2
Method for carrying out a shading correction and optical observation device system
Dominik Scherer, Aalen (DE); Susanne Kohlhammer, Blaustein (DE); and Stefan Saur, Aalen (DE)
Assigned to Carl Zeiss Meditec AG, Jena (DE)
Filed by Carl Zeiss Meditec AG, Jena (DE)
Filed on Feb. 28, 2022, as Appl. No. 17/683,291.
Application 17/683,291 is a continuation of application No. 16/584,015, filed on Sep. 26, 2019, granted, now 11,295,484.
Claims priority of application No. 10 2018 123 781.2 (DE), filed on Sep. 26, 2018.
Prior Publication US 2022/0189079 A1, Jun. 16, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06T 11/00 (2006.01); G06T 5/00 (2006.01); G06T 7/90 (2017.01); G06T 15/80 (2011.01); G06T 19/20 (2011.01)
CPC G06T 11/001 (2013.01) [G06T 7/90 (2017.01); G06T 15/80 (2013.01); G06T 19/20 (2013.01); G06T 5/008 (2013.01); G06T 2200/04 (2013.01); G06T 2207/10028 (2013.01); G06T 2207/10056 (2013.01); G06T 2207/30096 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A method for correcting a shading in a digital image of a three-dimensional observation object obtained with an optical observation device, the optical observation device including a first image sensor and a second image sensor, the first image sensor being arranged in a first partial beam path defined by the optical observation device and the second image sensor being arranged in a second partial beam path defined by the optical observation device, the three-dimensional observation object being illuminated by illumination light having an intensity distribution, and an inhomogeneity in an image brightness being present in the digital image of the three-dimensional observation object, the method comprising:
ascertaining a topography of the three-dimensional observation object;
correcting the inhomogeneity in the image brightness of the digital image based on the topography of the three-dimensional observation object and the intensity distribution of the illumination light;
embodying the optical observation device to record stereoscopic images, the first image sensor being configured to record a first stereoscopic partial image and the second image sensor being configured to record a second stereoscopic partial image;
ascertaining the topography of the three-dimensional observation object based on the first and second stereoscopic partial images; or
ascertaining the topography of the three-dimensional observation object based on a structured illumination and a distortion of a structure of an illumination in the image of the three-dimensional observation object recorded with the structured illumination.