کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
808154 | 1369639 | 2016 | 5 صفحه PDF | دانلود رایگان |
• Global look-up table strategy is used to accelerate B-spline interpolation in digital image correlation (DIC).
• Performance of the strategy is evaluated theoretically and experimentally.
• The strategy is found a superior substitute for the one with bicubic interpolation.
Global look-up table strategy proposed recently has been proven to be an efficient method to accelerate the interpolation, which is the most time-consuming part in the iterative sub-pixel digital image correlation (DIC) algorithms. In this paper, a global look-up table strategy with cubic B-spline interpolation is developed for the DIC method based on the inverse compositional Gauss–Newton (IC-GN) algorithm. The performance of this strategy, including accuracy, precision, and computation efficiency, is evaluated through a theoretical and experimental study, using the one with widely employed bicubic interpolation as a benchmark. The global look-up table strategy with cubic B-spline interpolation improves significantly the accuracy of the IC-GN algorithm-based DIC method compared with the one using the bicubic interpolation, at a trivial price of computation efficiency.
Journal: Theoretical and Applied Mechanics Letters - Volume 6, Issue 3, May 2016, Pages 126–130