US 12,106,543 B2
Method for extracting spectral information of a substance under test
Min Liu, Shenzhen (CN); Zhe Ren, Shenzhen (CN); Xingchao Yu, Shenzhen (CN); Jinbiao Huang, Shenzhen (CN); and Bin Guo, Shenzhen (CN)
Assigned to SHENZHEN HYPERNANO OPTICS TECHNOLOGY CO., LTD., Shenzhen (CN)
Appl. No. 17/603,318
Filed by SHENZHEN HYPERNANO OPTICS TECHNOLOGY CO., LTD., Shenzhen (CN)
PCT Filed Mar. 30, 2020, PCT No. PCT/CN2020/081962
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2021/195817, PCT Pub. Date Oct. 7, 2021.
Prior Publication US 2022/0207856 A1, Jun. 30, 2022
Int. Cl. G06K 9/00 (2022.01); G01J 3/28 (2006.01); G01N 21/25 (2006.01); G01N 21/27 (2006.01); G01N 21/31 (2006.01); G01N 21/55 (2014.01); G06T 7/90 (2017.01); G06V 10/143 (2022.01); G06V 10/25 (2022.01); G06V 10/58 (2022.01); H04N 5/30 (2006.01); H04N 23/10 (2023.01)
CPC G06V 10/58 (2022.01) [G01J 3/2803 (2013.01); G01N 21/25 (2013.01); G01N 21/27 (2013.01); G01N 21/31 (2013.01); G01N 21/55 (2013.01); G06T 7/90 (2017.01); G06V 10/143 (2022.01); G06V 10/25 (2022.01); H04N 5/30 (2013.01); H04N 23/10 (2023.01); G01J 2003/2826 (2013.01); G01N 2021/556 (2013.01); G01N 2021/557 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for extracting spectral information of a substance under test, comprising the following steps:
S1: identifying a pixel region A(x, y) occupied by an object under test from an acquired hyperspectral image;
S2: extracting a specular reflection region Aq and a diffuse reflection region Ar from the pixel region A(x, y), and calculating a representative spectrum Iq(ω) of the specular reflection region Aq and a representative spectrum Ir(ω) of the diffuse reflection region Ar, respectively; and S3: by comparing each element in the representative spectrum Iq(ω) of the specular reflection region Aq with each element in the representative spectrum Ir(ω) of the diffuse reflection region Ar, separating information of a light source from spectral information of the object under test to obtain a first spectral invariant C(ω).