Summary: Morphological texture gradients: Denition and
application to colour and texture watershed
Centre de Morphologie Mathématique, Ecole des Mines de Paris, 35, rue Saint-Honoré,
77305 Fontainebleau, France
Abstract This paper deals with a morphological approach to calculate tex-
ture gradients and it is shown how to use them for image seg-
mentation according to the texture; and more generally, for joint
colour/texture segmentation (i.e., structural segmentation). The
starting point is a decomposition of the colour image into two com-
ponents: the object layer and the texture layer. A multi-scale local
analysis from the texture layer is built using morphological op-
erators (openings/closings or levelings) to dene the gradients of
texture. The proposed texture gradient is then combined with the
colour gradient to produce mixed segmentations by watershed.
Keywords: granulometry, leveling, colour/texture decomposition, colour gra-
dient, texture gradient, watershed transformation.