Usage: htkernu in.pgm <imcond.pgm|null> connex out.pgm
Description: Grayscale ultimate homotopic thickening (refs. [BEC97, CBB01]). The parameter connex gives the connectivity used for the minima; possible choices are 4, 8 in 2D and 6, 26 in 3D. Let F be the function corresponding to the input image in.pgm. Let G be the function corresponding to the input image imcond.pgm, or the null function if the keyword null is used. The algorithm is the following:
Repeat until stability:
select p constructible for F such that F(p) is maximal
F(p) = min{ delta+(p,F), G(p) }
Result: F
References:
[BEC97] G. Bertrand, J. C. Everat and M. Couprie: "Image segmentation through operators based upon topology", Journal of Electronic Imaging, Vol. 6, No. 4, pp. 395-405, 1997.
[CBB01] M. Couprie, F.N. Bezerra, Gilles Bertrand: "Topological operators for grayscale image processing", Journal of Electronic Imaging, Vol. 10, No. 4, pp. 1003-1015, 2001.
Types supported: byte 2D, byte 3D.
Category: topogray
1.2.18