Surface area of the egg is calculated by theoretically slicing the egg into 80 cross sections and regarding each as a right frustrum of a cone. The radii of the circles that make up the top and bottom of the cone (rt and rb) are equal to half the number of black pixels in the corresponding rows, and the height (h) of the frustrum is calculated as 1/80 times the total height of the egg.
The surface area of the perimeter of each frustrum is calculated as in Paganelli et al. (1974).
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The surface area of the perimeter of each frustrum is calculated as in Paganelli et al. (1974).
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