|[mmhistogram] [Up] [mmblob]||Measurements|
Implemented in Python.
|y||Image Gray-scale (uint8 or uint16) or binary image.
If number of labels is less than 65535, the data type is uint16, otherwise it is int32.
mmlabel creates the image
y by labeling the connect components of a binary image
f, according to the connectivity defined by the structuring element
Bc. The background pixels (with value 0) are not labeled. The maximum label value in the output image gives the number of its connected components.
def mmlabel(f, Bc=None): from Numeric import allclose, ravel, nonzero, array if Bc is None: Bc = mmsecross() assert mmisbinary,'Can only label binary image' zero = mmsubm(f,f) # zero image faux=f r = array(zero) label = 1 y = mmgray( f,'uint16',0) # zero image (output) while not allclose(faux,0): x=nonzero(ravel(faux)) # get first unlabeled pixel fmark = array(zero) fmark.flat[x] = 1 # get the first unlabeled pixel r = mminfrec( fmark, faux, Bc) # detects all pixels connected to it faux = mmsubm( faux, r) # remove them from faux r = mmgray( r,'uint16',label) # label them with the value label y = mmunion( y, r) # merge them with the labeled image label = label + 1 return y
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|Copyright (c) 2003, Roberto A. Lotufo, UNICAMP-University of Campinas; Rubens C. Machado, CenPRA-Renato Archer Research Center.|