US 12,266,135 B2
Universal sensor performance and calibration target for multi-sensor imaging systems
Nijumudheen Muhassin, Pittsburgh, PA (US); Yew Kwang Low, Singapore (SG); and Jayesh Dwivedi, Pittsburgh, PA (US)
Assigned to Motional AD LLC, Boston, MA (US)
Filed by Motional AD LLC, Boston, MA (US)
Filed on Jan. 21, 2022, as Appl. No. 17/581,637.
Prior Publication US 2023/0252678 A1, Aug. 10, 2023
Int. Cl. H04N 17/02 (2006.01); G01S 7/40 (2006.01); G01S 7/497 (2006.01); G01S 13/89 (2006.01); G01S 17/89 (2020.01); G06T 5/73 (2024.01); G06T 7/80 (2017.01); H04N 17/00 (2006.01); H04N 25/615 (2023.01)
CPC G06T 7/80 (2017.01) [G01S 7/40 (2013.01); G01S 7/497 (2013.01); G01S 13/89 (2013.01); G01S 17/89 (2013.01); G06T 5/73 (2024.01); H04N 17/002 (2013.01); H04N 25/615 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A calibration target system, comprising:
at least one calibration target element comprising:
an outer perimeter,
a modular transfer function (MTF) testing area positioned on the at least one calibration target element within the outer perimeter, the MTF testing area comprising a light-absorbing surface and at least one slant edge that is non-orthogonal with respect to any side of the outer perimeter,
a through hole extending through the at least one calibration target element, and
a plurality of slots extending through the at least one calibration target element; and
at least one black body source positioned behind the at least one calibration target element, the black body source configured to emit black body radiation such that the black body radiation passes through the through hole and the plurality of slots.