Members of a wavelet family: an original and two shifted and dilated copies. (a) Original wavelet ψ with width w. (b) Large-scale wavelet ψa,b, with width aw that is larger than the original width w. (c) Fine-scale wavelet ψa,b with narrow width.
Crab carapaces from five different species b–f as deformations of a. By transforming the grid coordinates, the variation in the shapes of the carapaces is minimized. (After D. W. Thompson, On Growth and Form, Cambridge University Press, 1917)