Digital image correlation (DIC) is an effective displacement field measurement method featuring non-contact and full-field, which has been successfully applied in lots of fields, especially in the field of experimental mechanics. Unfortunately, the traditional DIC technique (TDIC) depends on the output values of image sensor heavily that usually noised in practical imaging system. So, TDIC cannot deal with bias error introduced by the image noise effectively. In this paper, a kernel based DIC is proposed to help reduce the bias error by establishing and optimizing a weighted correlation function. Compared with the methods of low-pass filtering, KDIC preserves the high frequency information well but reduces the bias error caused by image noise effectively. To demonstrate, two kinds of kernel function are analyzed. One is Epanechnikov kernel, with which KDIC is equivalent to TDIC. The other is Gaussian kernel, which can be used to improve the anti-noise performance of TDIC and get more accurate sub-pixel displacements. Both simulation analyses and experimental results validate the effectiveness of this new method.
목차
Abstract 1. Introduction 2. Introductions of TDIC and KDIC 2.1. Basic Principles of TDIC 2.2. Definition of KDIC 3. Simulation Analysis 4. Experimental Verification 5. Conclusion Acknowledgements References
Huan Shen [ Energy and Power College, Nanjing University of Aeronautics and Astronautics, No. 29, Yudao Street, Baixia District, Nanjing 210016, China, Aeronautics Science and Technology Key Laboratory of full scale aircraft structure and fatigue, No. 85, Dianzi 2nd Road, Yanta District, Xi’an 710065, China ]
Peize Zhang [ Energy and Power College, Nanjing University of Aeronautics and Astronautics, No. 29, Yudao Street, Baixia District, Nanjing 210016, China ]
Xiang Shen [ Aeronautics Science and Technology Key Laboratory of full scale aircraft structure and fatigue, No. 85, Dianzi 2nd Road, Yanta District, Xi’an 710065, China ]
보안공학연구지원센터(IJSIP) [Science & Engineering Research Support Center, Republic of Korea(IJSIP)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Signal Processing, Image Processing and Pattern Recognition
간기
격월간
pISSN
2005-4254
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Signal Processing, Image Processing and Pattern Recognition Vol.8 No.3