DIC Challenge 2.0: Developing Images and Guidelines for Evaluating Accuracy and Resolution of 2D Analyses

The DIC Challenge 2.0 follows on from the work accomplished in first Digital Image Correlation (DIC) Reu et al. (Experimental Mechanics 58(7):1067, 1). second challenge was required to better quantify spatial resolution of 2D-DIC codes. goal this paper is outline methods and images for community use evaluate performance their codes improve implementation 2D-DIC. This covers creation new analysis discussion results. It proposes a method unambiguously defining explores tradeoff between displacement strain noise (or measurement noise) wide variety by combination presented here factor called Metrological Efficiency Indicator (MEI). 2D generally followed expected theoretical performance, particularly displacement. comparison did however show that even with fairly uniform calculation varied widely. provides useful framework understanding analyzing software using provided images. details some unique errors associated these images, such as Pattern Induced Bias (PIB) imprecision introduced through method. Future authors claiming improvements accuracy are encouraged an unambiguous comparison.