L. Oriat et E. Lantz, SUBPIXEL DETECTION OF THE CENTER OF AN OBJECT USING A SPECTRAL PHASE ALGORITHM ON THE IMAGE, Pattern recognition, 31(6), 1998, pp. 761-771
This paper presents an algorithm designed for detecting the center of
an object with central symmetry in an image. It is well known that the
spectral phase of such an object is a plane whose orientation depends
on the object position in the image. Our algorithm applies weighting
of the moduli to determine the slope and the orientation of this wrapp
ed phase plane in the image spectrum. A comparison is made with other
conventional methods and shows the advantages of this algorithm: subpi
xel resolution, computing speed, ease of implementation. (C) 1998 Patt
ern Recognition Society. Published by Elsevier Science Ltd. All rights
reserved.