Patterns recovery and Imaging

The Fast Marching method is able to use (at least!) two kinds of information from an image:
- the numerical values of the pixels (in grey or color scales)
- the variation of these values (the gradient intensity color).

Patterns recovery: White pixels can be used as a mask of obstacles

Original image
Recovery process
Seeds
Mask

Imaging:

1.- Without mask:

Original image
Imaging process
Valid intermediate state
Later state

2.- With mask:

Seeds & Mask
Imaging with mask
Same state, also valid
A little bit better