Movie 1

Approximation of a closed contour using Elliptic Fourier Analysis. A given two-dimensional shape can be approximated using EFA by summing n elliptic harmonics as follows: each nth elliptic harmonic traces n clockwise or counter-clockwise revolutions while moving around the previous elliptic harmonic.

Morphometrics of complex cell shapes: lobe contribution elliptic Fourier analysis (LOCO-EFA)

Yara E. Sánchez-Corrales, Matthew Hartley, Jop van Rooij, Athanasius F.M. Marée, and Verônica A. Grieneisen

Development 2018. 145:None-None; doi: 10.1242/dev.156778