__init__(self, func, jacobian, hessian=None, spring_constants=0.1, distance_function=None, step_finder='gradient-descent', logger=None, **opts): 

get_dist(self, p1, p2): 

get_tangent(self, guess, mask, cur, prev, next): 

adjust_jacobian(self, jac, guess, mask, cur, prev, next): 

image_pairwise_contribution(self, guess, mask, cur, prev, next, order=0):