US 12,276,770 B2
Resolution improvement in dual energy
Guillaume Jegou, Vitry-sur-Seine (FR); and Sébastien Grabeuil, Vitry-sur-Seine (FR)
Assigned to SMITHS DETECTION FRANCE S.A.S., Vitry-sur-Seine (FR)
Appl. No. 17/908,424
Filed by SMITHS DETECTION FRANCE S.A.S., Vitry-sur-Seine (FR)
PCT Filed Mar. 2, 2021, PCT No. PCT/GB2021/050521
§ 371(c)(1), (2) Date Aug. 31, 2022,
PCT Pub. No. WO2021/176207, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 2003046 (GB), filed on Mar. 3, 2020.
Prior Publication US 2023/0089927 A1, Mar. 23, 2023
Int. Cl. G01V 5/22 (2024.01); G06T 5/40 (2006.01); G06T 7/00 (2017.01); G06V 10/50 (2022.01); H04N 25/46 (2023.01)
CPC G01V 5/224 (2024.01) [G06T 5/40 (2013.01); G06T 7/0002 (2013.01); G06V 10/507 (2022.01); H04N 25/46 (2023.01); G06T 2207/30112 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for processing inspection data associated with cargo irradiated by a plurality N of pulses of inspection radiation, the method comprising:
obtaining the inspection data,
the inspection data being representative of intensity values of pixels of an inspection image of the cargo generated as a result of a plurality of detectors detecting the plurality N of pulses transmitted through the cargo, and
the inspection data comprising data associated with a higher energy mode, and data associated with a lower energy mode;
generating a histogram having, as a first axis, bins corresponding to pixel intensity values HM associated with the higher energy mode and, as a second axis, bins corresponding to pixel intensity values LM associated with the lower energy mode,
wherein generating the histogram comprises binning, for each pixel (i,j) of the inspection image corresponding to each pulse i and each detector j of the plurality of detectors, an occurrence in the obtained inspection data such that:

OG Complex Work Unit Math
selecting, on the generated histogram, for each bin of the pixel intensity values LM, a bin corresponding to a most frequent bin of the pixel intensity values HM; and
generating a transformation table by mapping each bin of the pixel intensity values LM with the selected bin of the pixel intensity values HM.