1. A method for registering a set of source points (S) in a reference image representing an organic tissue with a set of target points (D) in a current image representing a deformed organic tissue, the method comprising determining a registration function (R) by iterative minimization of a registration energy E reg , the registration function corresponding to a transformation allowing source points (S) of the reference image to be mapped to corresponding target points (D) in the current image, wherein the registration function (R) is an elastic registration function meeting conditions to guarantee heed of physical criteria of the organic tissue, the conditions comprising: (a) a Jacobian of the elastic registration function is greater than 0; (b) the registration function is continuously differentiable; and (c) the registration function is bijective.