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14 February 2005 Improved digital speckle correlation method and its application
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According to image correlation and stereoscopic vision theory, an improved digital image correlation is proposed, which is called as three dimensional digital marker method. The stereoscopic vision and image correlation techniques are integrated, the symbol point before and after deformation is tracked and registered by image correlation algorithm, three dimensional displacement is restored by the two dimensional displacement component in image plane of both cameras. The new method is an improved version of previous two dimensional digital marker method, which not only has the advantages such as experimental procedure simpleness, wide range of deformation measurement, but also extends the applicable scope. Finally, the proposed method is used to the foam specimen rigid translation. The results show that the new method is capable of measuring three dimensional displacement simply and quickly.
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CanLin Zhou and YiLan Kang "Improved digital speckle correlation method and its application", Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005);

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