%0 Journal Article %T Introducing Virtual DIC to Remove Interpolation Bias and Process Optimal Patterns %+ Institut Pascal (IP) %A Shi, Y. %A Blaysat, B. %A Chanal, Hélène %A Grédiac, M. %Z IDEX-ISITE initiative 16-IDEX-0001 (CAP 20-25)the AURA regional council %< avec comité de lecture %@ 0014-4851 %J Experimental Mechanics %I Society for Experimental Mechanics %8 2023-02-14 %D 2023 %R 10.1007/s11340-023-00941-2 %K Digital Image Correlation %K DIC %K Metrology %K Full-field measurement %K Checkerboard patterns %Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph]Journal articles %X Background: Digital Image Correlation (DIC) is an image-based measurement technique routinely used in experimental mechanics, which provides displacement and strain maps of an observed surface/volume. The metrological performance of DIC has reached its limit which is directly determined by the texture of the imaged surface/volume. Objective : This paper proposes a novel DIC strategy, which relies on a virtual image. This image, noiseless and of infinite resolution, is moreover optimized for providing measurements with the best metrological performance. Methods : The so-called Virtual DIC retrieves the displacement fields by comparing this virtual image to the experimental images. No interpolation is required andprocessing optimal textures such as checkerboards is possible. Results : Virtual DIC is first applied on synthetic images for comparison purposes with a usual DIC approach. Outstanding metrological performance is observed thanks to the possibility of processing checkerboard patterns. Conclusions : The proposed Virtual DIC is twofold: (i) thanks to the use of a closed-form expression, built-in DIC operators are elaborated without recurring to noisy and poorly defined real images. Interpolation is therefore avoided; (ii) it makes possible it to process checkerboard patterns, which offers the best metrological performance. %G English %2 https://uca.hal.science/hal-04002213/document %2 https://uca.hal.science/hal-04002213/file/main.pdf %L hal-04002213 %U https://uca.hal.science/hal-04002213 %~ PRES_CLERMONT %~ CNRS %~ UNIV-BPCLERMONT %~ INSTITUT_PASCAL %~ ACL-SPI %~ ANR %~ CLERMONT-AUVERGNE-INP %~ TEST3-HALCNRS