PMID- 26974624
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160714
LR  - 20181023
IS  - 1539-4522 (Electronic)
IS  - 1559-128X (Linking)
VI  - 55
IP  - 7
DP  - 2016 Mar 1
TI  - 3D robust digital image correlation for vibration measurement.
PG  - 1641-8
LID - 10.1364/AO.55.001641 [doi]
AB  - Discrepancies of speckle images under dynamic measurement due to the different 
      viewing angles will deteriorate the correspondence in 3D digital image 
      correlation (3D-DIC) for vibration measurement. Facing this kind of bottleneck, 
      this paper presents two types of robust 3D-DIC methods for vibration measurement, 
      SSD-robust and SWD-robust, which use a sum of square difference (SSD) estimator 
      plus a Geman-McClure regulating term and a Welch estimator plus a Geman-McClure 
      regulating term, respectively. Because the regulating term with an adaptive 
      rejecting bound can lessen the influence of the abnormal pixel data in the 
      dynamical measuring process, the robustness of the algorithm is enhanced. The 
      robustness and precision evaluation experiments using a dual-frequency laser 
      interferometer are implemented. The experimental results indicate that the two 
      presented robust estimators can suppress the effects of the abnormality in the 
      speckle images and, meanwhile, keep higher precision in vibration measurement in 
      contrast with the traditional SSD method; thus, the SWD-robust and SSD-robust 
      methods are suitable for weak image noise and strong image noise, respectively.
FAU - Chen, Zhong
AU  - Chen Z
FAU - Zhang, Xianmin
AU  - Zhang X
FAU - Fatikow, Sergej
AU  - Fatikow S
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Appl Opt
JT  - Applied optics
JID - 0247660
EDAT- 2016/03/15 06:00
MHDA- 2016/03/15 06:01
CRDT- 2016/03/15 06:00
PHST- 2016/03/15 06:00 [entrez]
PHST- 2016/03/15 06:00 [pubmed]
PHST- 2016/03/15 06:01 [medline]
AID - 336728 [pii]
AID - 10.1364/AO.55.001641 [doi]
PST - ppublish
SO  - Appl Opt. 2016 Mar 1;55(7):1641-8. doi: 10.1364/AO.55.001641.