the rule that for example 10 of the picture elements additionally lie above the threshold with every step as soon as a level below the noise limit has been reached zero is immediately used as the growth boundary the first seed point cannot yet be allocated to any region it must exceed an intensity threshold l j at the start j 1 calculated according to the above method among the pixels with the amplitude gt l j that pixel is selected for which the sum of its own amplitude and that of the eight neighboring pixels is maximum when a point has thus been found then this is allocated to a region u2014 i e to region 1 at the start u2014 in step s 3 the region counter n is incremented by 1 in step s 4 the phase of the seed point is entered into the phase map the flag is correspondingly marked as u201c calculated u201d in step s 6 this seed point is shifted into the working queue since the working queue now contains an element namely the first seed point this seed point e is taken from the working queue in step s 7 and in step s 8 all neighboring pixels of e that were not yet processed when.