US 11,915,399 B2
Method and device for correcting lateral chromatic aberration, storage medium, and computer equipment
Juuso Gren, Tampere (FI); Dmytro Paliy, Tampere (FI); and Vida Fakour Sevom, Tampere (FI)
Assigned to Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed by Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed on Dec. 31, 2020, as Appl. No. 17/138,943.
Prior Publication US 2022/0207666 A1, Jun. 30, 2022
Int. Cl. G06K 9/00 (2022.01); G06T 5/00 (2006.01); G02B 27/00 (2006.01)
CPC G06T 5/006 (2013.01) [G02B 27/0025 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for correcting lateral chromatic aberration (LCA), comprising:
capturing a target image from a test chart;
calculating amount of LCA of a camera module based on the target image, comprising:
upscaling the target image to obtain an upscaled target image;
detecting pattern elements and calculating mass centers of the pattern elements based on the upscaled target image;
compensating for shift of the mass centers by Bayer shift compensation;
removing the pattern elements with wrong parameters by an outlier removal algorithm;
extrapolating the mass centers of the pattern elements at borders of the upscaled target image; and
converting scattered data into 2D regularly sampled grid to obtaining the amount of LCA;
storing the amount of LCA as the calibration data;
acquiring system parameters and pre-stored calibration data;
obtaining the LCA of a camera to be corrected by calculating the system parameters; and
correcting the LCA by the calibration data.