Image Segmentation via topological derivative

Segment an image using the topological derivative (continuous and discrete algorithms).

Segmentates an image using both the Continuum and Discrete Topological Derivative algorithms. The main idea behind this algorithms is to compute the topological derivative for an appropriate functional and a perturbation given by changing the class that a particular pixel is segmented in from one class to another in the set cls. This derivative is used as an indicator function to find the best class that each pixels should be classified in (see references in 'references.txt' file).