US 12,323,712 B2
Image exposure techniques for ophthalmic microscope devices
Alain Weber, Köniz (CH); and Philipp Gloor, Köniz (CH)
Assigned to Haag-Streit AG, Köniz (CH)
Appl. No. 18/265,851
Filed by Haag-Streit AG, Köniz (CH)
PCT Filed Jan. 22, 2021, PCT No. PCT/EP2021/051481
§ 371(c)(1), (2) Date Jun. 7, 2023,
PCT Pub. No. WO2022/156904, PCT Pub. Date Jul. 28, 2022.
Prior Publication US 2023/0379589 A1, Nov. 23, 2023
Int. Cl. A61F 9/007 (2006.01); A61B 3/13 (2006.01); G06T 3/40 (2006.01); G06T 7/13 (2017.01); G06V 10/60 (2022.01); H04N 23/73 (2023.01); H04N 23/74 (2023.01)
CPC H04N 23/73 (2023.01) [A61B 3/13 (2013.01); G06T 3/40 (2013.01); G06T 7/13 (2017.01); G06V 10/60 (2022.01); H04N 23/74 (2023.01); G06T 2207/10056 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for controlling image exposure in an ophthalmic microscope device, wherein the ophthalmic microscope device has a camera and an illumination source, and wherein the method comprises:
recording a camera image with the camera using first exposure parameters,
using edge detection to identify at least one first sub-region and at least one second sub-region of the camera image, wherein the first sub-region has a higher edge density than the second sub-region,
calculating a brightness parameter of the camera image by weighing pixel brightness in the first sub-region more strongly than pixel-brightness in the second sub-region,
depending on the brightness parameter, adjusting the first exposure parameters to obtain second exposure parameters, and
recording an adjusted image with the camera using the second exposure parameters.