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Figure 2a: During movements labeled with m1, m2, m3, and m4, over the border of the shape, the ways taken on the xaxis have been labeled with x1, x2, x3, and x4; and the ways on the yaxis, with y1, y2, y3, and y4. As shown, the total way on the xaxis, in other words sum of x1, x2, x3, and x4, is equal to twofold the maximum width; and the total way on the yaxis, twofold the maximum height Figure 2b: In order to calculate an asymmetry score (auto  A score), fi rst, the absolute differences between number of pixels over the diameter and number of pixels under the diameter are determined for each point on the diameter. Then, their sum is divided by the area of the shape 
