US 12,225,321 B2
Validation of infrared (IR) camera distortion accuracy
Yongjun Wang, Pleasanton, CA (US); Marco Antonio Gaxiola Michel, San Francisco, CA (US); and Daniel Chou, San Diego, CA (US)
Assigned to GM Cruise Holdings LLC, San Francisco, CA (US)
Filed by GM Cruise Holdings LLC, San Francisco, CA (US)
Filed on Sep. 11, 2023, as Appl. No. 18/244,884.
Application 18/244,884 is a continuation of application No. 17/537,009, filed on Nov. 29, 2021, granted, now 11,792,356.
Prior Publication US 2023/0421720 A1, Dec. 28, 2023
Int. Cl. H04N 5/33 (2023.01); G06T 7/80 (2017.01); H04N 5/208 (2006.01); H04N 25/67 (2023.01)
CPC H04N 5/33 (2013.01) [H04N 5/208 (2013.01); H04N 25/67 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A method for determining an accuracy of an infrared (IR) camera, the method comprising:
receiving image data captured by an IR camera, wherein the image data is descriptive of one or more lines corresponding to one or more strings of a calibration harp;
analyzing a nonlinearity of the one or more lines of the image data;
determining a degree of distortion of the one or more lines based on the nonlinearity of the one or more lines;
connecting the one or more strings held under tension to an electrical current;
capturing one or more images of the one or more strings by the IR camera;
evaluating the one or more images of the one or more strings using a line fitting tool; and
repeating the capturing the one or more images and the evaluating the one or more images across a field of view of the IR camera.