期刊
JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
卷 55, 期 7-8, 页码 199-211出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0309324720927102
关键词
Covariance matrix; noise floor level; stereocorrelation; uncertainty quantification
资金
- PRC MECACOMP
- SAFRAN Group
- DGAC
- CNRS
- ONERA
Multiview correlation is based on the use of explicitly parameterizing surfaces whose deformation is to be measured. In the present analyses, the surfaces are modeled as triangular facets (for local approaches), and with finite-element meshes (for global approaches) using a linear interpolation between nodal displacements. Displacement uncertainty due to the presence of noise in the images is considered. The noise floor levels of the latter are compared for both local and global cases with two different sets of pictures. A priori estimates based on the Hessian of the registration procedure are derived analytically, and a simplified expression is provided that is shown to be in very good agreement with their a posteriori evaluations. The uncertainty difference between local and global approaches is interpreted from their different spatial resolutions.
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