Title :
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
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;
Conference_Titel :
Multimedia Technology (ICMT), 2011 International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-61284-771-9
DOI :
10.1109/ICMT.2011.6001804
