Application of Reparameterized Fourier Descriptors of E-Beam Target Boundaries

摘要

Two methods are derived for obtaining Fourier descriptors of simple plane closed curves. The results produced are dependent on a desirable parametric form of the curve (i.e., using arc length or central angle) and not on the actual parametric form that is available. When applied to a typical target boundary, each resulting set of Fourier descriptors defines the boundary harmonic content, but the magnitudes and distributions must be interpreted in the proper context. (ERA citation 81:026712)