Mellin radial harmonic filter for scale invariant detection of contours
Guy Lebreton, Jianping Yao · Optics in Computing · 1997
Mellin-Radial harmonic (MRH) decomposition has been introduced by Mendlovic at al. [1] as an orthogonal expansion over the radius with a set of orthogonal basis functions Φ(r) = r i 2 πN − 1, with N integer: where (x0,y0) is the expansion center, R0 and r0 are the maximum and the minimum radius of input pattern.