The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 2024
Filed:
Dec. 28, 2023
China University of Geosciences (Wuhan), Wuhan, CN;
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, CN;
Yule Hu, Wuhan, CN;
Yuyong Jiao, Wuhan, CN;
Xuefeng Yan, Wuhan, CN;
Zengqiang Han, Wuhan, CN;
Yiteng Wang, Wuhan, CN;
Luyi Shen, Wuhan, CN;
Junpeng Zou, Wuhan, CN;
Fei Zheng, Wuhan, CN;
Peng Zhang, Wuhan, CN;
Abstract
A method for three-dimensional (3D) imaging of an underground goaf includes: obtaining a video image and point cloud data of an underground goaf; determining a posture transformation matrix, and aligning the video image and the point cloud data; identifying a material texture based on the video image to obtain material texture information; dividing the point cloud data into triangular meshes to form an initial 3D model of the underground goaf; mapping the material texture information onto the 3D model to form a target 3D model with a material texture attribute; calculating a bidirectional reflectance distribution function (BRDF) of the target 3D model based on the material texture attribute; simulating global illumination, and constructing a rendering equation; and making a setting to emit ray from a viewpoint, and performing ray tracing based on the rendering equation to obtain a high-brightness real scene image of the underground goaf.