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. 2016 Jul 1;11(7):e0157854. doi: 10.1371/journal.pone.0157854

Fig 5. Checkerboard image acquisition and analysis.

Fig 5

(a) The checkerboard images are acquired by the Google Glass at different orientations and different imaging distances. (b) The bar graph displays the mean reprojection errors for the acquired images, with an average error of around 0.54 pixels.