Full-field strain measurement using a two-dimensional Savitzky-Golay digital differentiator in digital image correlation

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Equivalence of digital image correlation criteria for pattern matching. (2010, methodology): “Detailed implementation algorithms for the ZNSSD criterion and PSSD ab criterion can be found in our previous works [28,17].”
High-temperature digital image correlation method for full-field deformation measurement at 1200 °C (2010, methodology): “From the ZNCC correlation coefficient map, we can also conclude that no evident decorrelation effect occurred in the image recorded at 1200 ◦C, which further verifies the effectiveness of the bandpass filter imaging system.”
Fast, Robust and Accurate Digital Image Correlation Calculation Without Redundant Computations (2013, unknown): “[10] and subsequently improved by others [11–16].”
Recent Progress in Digital Image Correlation (2011, methodology): “The ZNSSD criterion, which is insensitive to both offset and scale changes of the intensity of the target subset [8,14], is defined as 2”
Smoothing Measured Displacements and Computing Strains Utilising Finite Element Method (2011, methodology): “For this reason, a least-squares method has long been widely used for the numerical differentiation in the calculation of in-plane strains from the displacements [6-8].”