US 11,750,943 B2
Method and device for correcting varying lateral chromatic aberration, storage medium, and computer equipment
Vida Fakour Sevom, Tampere (FI); Dmytro Paliy, Tampere (FI); and Juuso Gren, Tampere (FI)
Assigned to AAC Optics Solutions Pte. Ltd., Singapore (SG)
Filed by AAC Optics Solutions Pte. Ltd., Singapore (SG)
Filed on Oct. 20, 2021, as Appl. No. 17/505,661.
Prior Publication US 2023/0118394 A1, Apr. 20, 2023
Int. Cl. H04N 25/611 (2023.01); G06T 7/80 (2017.01); H04N 25/61 (2023.01); G02B 27/00 (2006.01); G06T 5/00 (2006.01)
CPC H04N 25/611 (2023.01) [G02B 27/005 (2013.01); G06T 5/006 (2013.01); G06T 7/80 (2017.01); H04N 25/61 (2023.01); G06T 2207/10024 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for correcting lateral chromatic aberration, comprising:
constructing a relationship model between lens position and magnitude of lateral chromatic aberration based on preset parameters of lens positions, and storing the relationship model as calibration data, comprising
capturing a target image from a test chart-diagram;
calculating magnitude of lateral chromatic aberration of a camera module based on the target image, comprising
amplifying the target image to obtain an amplified target image;
detecting target graphics and calculating mass centers of the target graphics based on the amplified target image;
compensating for shift of the mass centers by sampling shift compensation;
removing target graphics with wrong parameters by an outlier removal algorithm;
extrapolating the mass centers of the target graphics at borders of the amplified target image; and
converting scattered data into a 2D regular grid, so as to obtain magnitude of lateral chromatic aberration; and
storing the relationship model between lens position and magnitude of lateral chromatic aberration as calibration data;
acquiring system parameters of a camera to be corrected and pre-stored calibration data;
obtaining the lateral chromatic aberration of the camera to be corrected by calculating the system parameters; and
correcting the lateral chromatic aberration by the calibration data.