US 11,741,595 B2
Concealed substance detection with hyperspectral imaging
Jihang Wang, Sewickley, PA (US); Evan Krieger, Pittsburgh, PA (US); Rick Beideman, Pittsburgh, PA (US); and Lucas P. Zbur, Murrysville, PA (US)
Assigned to CHEMIMAGE CORPORATION, Pittsburgh, PA (US)
Filed by CHEMIMAGE CORPORATION, Pittsburgh, PA (US)
Filed on Apr. 27, 2021, as Appl. No. 17/241,834.
Claims priority of provisional application 63/016,097, filed on Apr. 27, 2020.
Prior Publication US 2021/0334954 A1, Oct. 28, 2021
Int. Cl. G06T 7/00 (2017.01); G06T 5/20 (2006.01)
CPC G06T 7/0008 (2013.01) [G06T 5/20 (2013.01); G06T 2207/10036 (2013.01); G06T 2207/20084 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method of distinguishing a target from a background in a sample, the method comprising:
generating a score image from a hyperspectral image, the hyperspectral image having been formed from photons that have interacted with a sample that includes the target and the background;
preprocessing the score image, the preprocessing comprising:
removing isolated outlier pixels from the score image,
performing substrate flat fielding of the score image,
performing hole detection and filling for the score image,
preforming image orientation of the score image, and
cropping the score image;
performing anomaly detection on the score image to remove confusants and identify one or more anomalies in the score image, the confusants including one or more of text, graphics, or images; and
classifying one or more anomalies as target or non-target.