Figure 3
From: Characterization of Necking Phenomena in High-Speed Experiments by Using a Single Camera
![Figure 3](http://media.springernature.com/full/springer-static/image/art%3A10.1155%2F2010%2F215956/MediaObjects/13640_2010_Article_316_Fig3_HTML.jpg)
Calibration target (a) and its positioning on the experimental stage (b). The centers of the white squares are automatically detected after a local thresholding and a calculation of the barycenters of the detected related components. The calibration is performed by matching the image coordinate of those centers and their 3D counterparts.