Design and simulation of high-precision video extensometer based on camera calibration

Author

Zhang, Yewei ; Zhou, Fuqiang ; Wang, Su

Author_Institution

Inst. of Instrum. & Opto-Electron. Eng., Beijing Univ. of Aeronaut. & Astronaut., Beijing, China

fYear

2011

fDate

26-28 July 2011

Firstpage

6295

Lastpage

6298

Abstract

Strian measurement is an important issue in the mechanics of materials. In order to develop high-precision measurement system of video extensometer, a measuring model of single-camera measuring object on a fixed plane is established . Based on this model, lens distortion can be corrected by camera calibration and the transformation relationship from the spatial location of object to pixel coordinates in the image can be obtained. Then with the help of image processing technologies, the measurement function of the system is realized. In addition, theoretical analysis and simulation experiments demonstrate the feasibility of single-camera measuring fixed plane as well as the measurement accuracy.

Keywords

calibration; extensometers; image processing; image sensors; lenses; strain measurement; video cameras; camera calibration; high precision measurement system; high precision video extensometer; image processing technology; lens distortion; material mechanics; measurement function; object spatial location; pixel coordinate; single camera measuring fixed plane; single camera measuring object measuring model; strain measurement accuracy; Calibration; Cameras; Charge coupled devices; Distortion measurement; Extraterrestrial measurements; Instruments; Mechanical variables measurement; camera calibration; lens distortion correction; measurement on fixed plane; single-camera model; video extensometer;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Technology (ICMT), 2011 International Conference on

Conference_Location

Hangzhou

Print_ISBN

978-1-61284-771-9

Type

conf

DOI

10.1109/ICMT.2011.6001804

Filename

6001804