US 12,457,313 B2
Three-dimensional (3D) reconstruction device and method of flame spectra
Xun Cao, Jiangsu (CN); Lijing Cai, Jiangsu (CN); Yan Zhang, Jiangsu (CN); Zhengyu Liu, Jiangsu (CN); and Chen Wang, Jiangsu (CN)
Assigned to NANJING UNIVERSITY, Jiangsu (CN)
Appl. No. 18/251,410
Filed by NANJING UNIVERSITY, Jiangsu (CN)
PCT Filed May 12, 2021, PCT No. PCT/CN2021/093258
§ 371(c)(1), (2) Date May 2, 2023,
PCT Pub. No. WO2022/116478, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 202011397676.0 (CN), filed on Dec. 4, 2020.
Prior Publication US 2023/0421746 A1, Dec. 28, 2023
Int. Cl. H04N 13/282 (2018.01); G06T 5/70 (2024.01); G06T 15/00 (2011.01)
CPC H04N 13/282 (2018.05) [G06T 5/70 (2024.01); G06T 15/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A reconstruction method for 3D flame spectrum, comprising following the steps of:
S1: placing a calibration cylinder in a combustion area to be reconstructed, capturing images of the calibration cylinder, and extracting corner coordinates of the calibration cylinder in a plurality of directions in the images of the calibration cylinder as corner coordinates of the combustion area to be reconstructed in the plurality of directions;
S2: removing the calibration cylinder and setting a fire in the combustion area to be reconstructed, capturing images of a flame from different shooting angles synchronously by a plurality of prism-mask shooting systems and a plurality of mirrors disposed around the flame to obtain hyperspectral data of the flame, and pre-processing the data; and
S3: reconstructing a 3D flame spectrum for each of a plurality of spectral channels by a 3D reconstruction algorithm of flame spectra,
wherein each prism-mask shoot system is provided with two of the plurality of mirrors disposed on a left side and a right side of an axis of the prism-mask shooting system to reflect data of the flame into the prism-mask shooting system to acquire hyperspectral data of the flame.