Labeling
            Algorithms that create images where pixels belonging to a same entity are set to a same intensity (label).
		- Labeling2d: Assigns the same label to each connected component of a two-dimensional binary or label image.
 - Labeling3d: Assigns a same label to each connected component of a three-dimensional binary or label image.
 - ReorderLabels: Forces values of a label image to be consecutive.
 - AssignLabel: Converts a binary image into a label image by changing its intensity values to a specific value.
 - AddObjectToLabel: Inserts a marker to a label image with a specific value.
 - GroupCloseLabelsl2d: Assigns a same label to objects that are closed to each other.
 
            
      In a label image, each intensity identifies a point belonging to a given set. Two types of label can be assigned
      to an image:
		- Labels identifying an object: the same label is assigned to the same connected components set. Two unconnected sets should have different labels.
 - Labels identifying a region: the same label is assigned to points presenting some common attributes such as lightness or texture. The same label can be assigned to several unconnected sets of points.