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Weighted Window in Digital Image Correlation Method

WANG Min1,CEN Yu-wan1,HU Xiao-fang2,XIE Neng-gang1,XU De-yi1 (1 School of Mechanical Engineering,Anhui University of Technology,Maanshan,Anhui 243002,China) (2 Chinese Academy Sciences Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China,Hefei 230026,China)  
In the digital image correlation method,the first step to obtain the displacements of each point in the images taken before and after deformation was to confirm its integer pixel displacement,then to compute its sub-pixel displacement using the correlation coefficient of the integer pixel.A new computing method about the integer pixel was developed,which was by using weighted window to compute the integer pixel displacement of each point.The numerical simulation results show that it can improve the displacement accuracy.
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