If the snake as described in Section XXXXXXXXXXis initialized in an empty image, how would you expect it to evolve during the fitting procedure? The spacing element of the snake prior (Equation...

If the snake as described in Section 17.2 is initialized in an empty image, how would you expect it to evolve during the fitting procedure?

The spacing element of the snake prior (Equation 17.5) encourages all of the control points of the snake to be the equidistant. An alternative approach is to give the snake a tendency to shrink (so that it collapses around objects). Write out an alternative expression for the spacing term that accomplishes this goal.