Journal
OPTICS LETTERS
Volume 36, Issue 16, Pages 3070-3072Publisher
Optica Publishing Group
DOI: 10.1364/OL.36.003070
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Funding
- National Science Foundation (NSF) [0825806]
- United States Army Research Office (USARO) [W911NF-10-1-0502]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0825806] Funding Source: National Science Foundation
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The interpolation algorithm plays an essential role in the digital image correlation (DIC) technique for shape, deformation, and motion measurements with subpixel accuracies. At the present, little effort has been made to improve the interpolation methods used in DIC. In this Letter, a family of recursive interpolation schemes based on B-spline representation and its inverse gradient weighting version is employed to enhance the accuracy of DIC analysis. Theories are introduced, and simulation results are presented to illustrate the effectiveness of the method as compared with the common bicubic interpolation. (C) 2011 Optical Society of America
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