US 12,254,666 B2
Method and system for stray light compensation
Björn Benderius, Lund (SE); Gunnar Dahlgren, Lund (SE); and Andreas Muhrbeck, Lund (SE)
Assigned to AXIS AB, Lund (SE)
Filed by Axis AB, Lund (SE)
Filed on Sep. 13, 2022, as Appl. No. 17/943,257.
Claims priority of application No. 21201110 (EP), filed on Oct. 6, 2021.
Prior Publication US 2023/0104411 A1, Apr. 6, 2023
Int. Cl. G06V 10/25 (2022.01); G06T 5/50 (2006.01); G06V 10/44 (2022.01); G06V 10/60 (2022.01); G06V 10/74 (2022.01)
CPC G06V 10/60 (2022.01) [G06T 5/50 (2013.01); G06V 10/25 (2022.01); G06V 10/449 (2022.01); G06V 10/761 (2022.01); G06T 2207/20221 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for stray light compensation, the method comprising:
acquiring a first image with a first imaging device covering a first field-of-view;
acquiring a second image with a second imaging device covering a second field-of-view, wherein the second field-of-view is larger than the first field-of-view and wherein the first field-of-view is included in the second field-of-view;
estimating stray light components in pixels of the first image from pixel data of pixels in the second image, wherein estimating stray light components in pixels of the first image comprises:
filtering the second image by a series of gaussian filters forming a series of filtered second images; and
linearly combining the filtered second images forming a stray light image comprising stray light components from pixels in the first image; and
compensating for stray light in the first image by subtracting the estimated stray light components in pixels of the first image.