Usage: asftndg in.pgm <c.pgm cc.pgm|null null> connex rmax out.pgm
Description: Alternate sequential filter controled by topology for multilevel images. Disc- or Ball-shaped structuring elements of increasing radius, ranging from 1 to rmax, are generated. Let D1...Dn be these structuring elements, sorted by increasing radius. Let I(0) = in.pgm, the ith intermediate result I(i) is obtained by the homotopic pseudo-closing of the homotopic pseudo-opening of I(i-1) by the structuring element Di. Two images c.pgm and cc.pgm can be given to serve as constraints. The image c.pgm must be 0 except for the points x that are to be preserved, which can be set to 255 or to I[x]. The image cc.pgm must be 255 except for the points x that are to be preserved, which can be set to 0 or to I[x]. The result out.pgm contains the final result I(n).
Types supported: byte 2d, byte 3d
Category: morpho, topogray
1.2.18