US 12,231,789 B1
Fixed pattern correction for Bayer pattern imager under low light conditions
Jerramy Lee Gipson, Willits, CA (US)
Assigned to Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed by Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed on Aug. 30, 2023, as Appl. No. 18/458,643.
Int. Cl. H04N 25/671 (2023.01); H04N 23/76 (2023.01)
CPC H04N 25/671 (2023.01) [H04N 23/76 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A method for dynamic fixed pattern correction for an image sensor, comprising:
storing a current image and a previous image received in the image sensor;
computing a bias and gain for the current image, wherein the computing comprises processing the current image together with a current local average value, the previous image, and a previous local average value;
generating a gain correction value and a bias correction value based on the computing;
combining the gain correction value and bias correction value with the current image to generate a corrected image; and
generating a Bayer image, based on the generated corrected image.