A method to express complex curves concisely and with high fidelity.
Piecewise spline interpolation between judiciously selected points on a curve reproduces it with great precision. A number of points much smaller than in current digitization techniques is needed and their positions fully characterize a curve. We present the rules to select the nodal points and we demonstrate that their positions are very sensitive to changes in wave form. They can therefore be used to identify a curve in parts or in its entirety, to provide its mathematical definition.
D000818:Animals; D004594:Electrophysiology; D006801:Humans; D008433:Mathematics; D008954:Models, Biological