US 11,950,006 B2
White balance and fixed pattern noise frame calibration using distal cap
Laurent Blanquart, Westlake Village, CA (US)
Assigned to DePuy Synthes Products, Inc., Raynham, MA (US)
Filed by DePuy Synthes Products, Inc., Raynham, MA (US)
Filed on Nov. 3, 2020, as Appl. No. 17/088,504.
Application 17/088,504 is a continuation of application No. 16/680,291, filed on Nov. 11, 2019, granted, now 10,855,942.
Application 16/680,291 is a continuation of application No. 15/351,222, filed on Nov. 14, 2016, granted, now 10,477,127, issued on Nov. 12, 2019.
Application 15/351,222 is a continuation of application No. 14/214,791, filed on Mar. 15, 2014, granted, now 9,492,060, issued on Nov. 15, 2016.
Claims priority of provisional application 61/791,186, filed on Mar. 15, 2013.
Prior Publication US 2021/0160444 A1, May 27, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 25/673 (2023.01); A61B 1/00 (2006.01); A61B 1/06 (2006.01); A61B 5/24 (2021.01); H04N 13/239 (2018.01); H04N 23/10 (2023.01); H04N 23/50 (2023.01); H04N 23/56 (2023.01); H04N 23/88 (2023.01)
CPC H04N 25/673 (2023.01) [A61B 1/00006 (2013.01); A61B 1/000095 (2022.02); A61B 1/00057 (2013.01); A61B 1/00137 (2013.01); A61B 1/06 (2013.01); A61B 1/0655 (2022.02); A61B 5/24 (2021.01); H04N 23/10 (2023.01); H04N 23/56 (2023.01); H04N 23/88 (2023.01); H04N 13/239 (2018.05); H04N 23/555 (2023.01); H04N 2209/044 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method for adjusting white balance in a digital imaging process for use with an endoscope in ambient light deficient environments comprising:
providing, during a training period, a cap that selectively covers a distal end of a lumen of the endoscope such that the cap is blocking external illumination to each pixel in a pixel array;
illuminating, during the training period, an interior of the cap using a controlled source of electromagnetic radiation;
determining, after the endoscope reaches its operating temperature during the training period, white balance coefficients while the cap is covering the distal end of the lumen and while illuminating the interior of the cap by the controlled source of electromagnetic radiation;
removing the cap from the distal end of the lumen at the operating temperature for the endoscope;
in response to removing the cap from the distal end of the lumen, sensing electromagnetic radiation with the pixel array to create an image frame; and
correcting white balance of the image frame using the white balance coefficients.