Abstract: A method for extracting a surface deformation feature of an object based on linear scanning three-dimensional point cloud is disclosed comprising: performing data acquisition by using a three-dimensional measurement sensor based on line structured light, and obtaining a three-dimensional point cloud data of a surface of the object after data pre-processing; eliminating influences of abnormal data and textures on extraction of sectional main profiles, to accurately obtain the sectional main profiles of the object; obtaining a binary image based on deformation feature points extracted from sections, in conjunction with a deformation feature knowledge base, and preliminarily positioning a deformation region based on sub-block images to obtain a set of target morphology sub-blocks; then performing a morphological operation on deformation feature points in the set of target morphology sub-blocks, and generating a deformation region of confidence ROC, and then performing a region growth to extract a target using ge
Type:
Grant
Filed:
January 15, 2016
Date of Patent:
August 25, 2020
Assignee:
WUHAN WUDA ZOYON SCIENCE AND TECHNOLOGY CO., LTD
Inventors:
Qingquan Li, Min Cao, Dejin Zhang, Hong Lin, Ying Chen
Abstract: A three-dimensional measurement sensor based on line structured light, comprising a sensing head and a controller. The sensing head is used for collecting section data and attitude information of its own, and matching the section data with the self attitude information. The sensing head comprises a three-dimensional camera, an attitude sensor, a laser and a control sub-board, wherein the three-dimensional camera is installed at a certain angle relative to the laser, and acquires elevation and grey information about an object surface corresponding to laser rays using a triangulation principle. The attitude sensor, the three-dimensional camera and the laser are installed on the same rigid plane, and the attitude sensor reflects measurement attitude of the three-dimensional camera and the laser in real time. The controller is used for measuring and controlling the sensing head, performing data processing transmission and supporting external control.
Type:
Grant
Filed:
August 26, 2016
Date of Patent:
February 25, 2020
Assignee:
WUHAN WUDA ZOYON SCIENCE AND TECHNOLOGY CO., LTD
Inventors:
Qingquan Li, Dejin Zhang, Min Cao, Xinlin Wang, Hong Lin
Abstract: The present invention discloses a stepwise refinement detection method for pavement cracks, processing pavement images comprising the following primary steps: extracting and processing marking lines, extracting ROA, adaptive threshold segmentation based on ROA, extracting ROC and region growth based on ROC direction feature weighting.
Type:
Grant
Filed:
April 27, 2015
Date of Patent:
November 26, 2019
Assignee:
WUHAN WUDA ZOYON SCIENCE AND TECHNOLOGY CO., LTD.
Inventors:
Qingquan Li, Dejin Zhang, Min Cao, Hong Lin
Abstract: A three-dimensional measurement sensor based on line structured light, comprising a sensing head and a controller. The sensing head is used for collecting section data and attitude information of its own, and matching the section data with the self attitude information. The sensing head comprises a three-dimensional camera, an attitude sensor, a laser and a control sub-board, wherein the three-dimensional camera is installed at a certain angle relative to the laser, and acquires elevation and grey information about an object surface corresponding to laser rays using a triangulation principle. The attitude sensor, the three-dimensional camera and the laser are installed on the same rigid plane, and the attitude sensor reflects measurement attitude of the three-dimensional camera and the laser in real time. The controller is used for measuring and controlling the sensing head, performing data processing transmission and supporting external control.
Type:
Application
Filed:
August 26, 2016
Publication date:
August 1, 2019
Applicant:
WUHAN WUDA ZOYON SCIENCE AND TECHNOLOGY CO., LTD
Inventors:
Qingquan LI, Dejin ZHANG, Min CAO, Xinlin WANG, Hong LIN
Abstract: A method for extracting a surface deformation feature of an object based on linear scanning three-dimensional point cloud is disclosed comprising: performing data acquisition by using a three-dimensional measurement sensor based on line structured light, and obtaining a three-dimensional point cloud data of a surface of the object after data pre-processing; eliminating influences of abnormal data and textures on extraction of sectional main profiles, to accurately obtain the sectional main profiles of the object; obtaining a binary image based on deformation feature points extracted from sections, in conjunction with a deformation feature knowledge base, and preliminarily positioning a deformation region based on sub-block images to obtain a set of target morphology sub-blocks; then performing a morphological operation on deformation feature points in the set of target morphology sub-blocks, and generating a deformation region of confidence ROC, and then performing a region growth to extract a target using ge
Type:
Application
Filed:
January 25, 2016
Publication date:
June 27, 2019
Applicant:
WUHAN WUDA ZOYON SCIENCE AND TECHNOLOGY CO., LTD.
Inventors:
Qingquan LI, Min CAO, Dejin ZHANG, Hong LIN, Ying CHEN