Before revision:  The dual-sparsity based non-rigid registration model is enhanced with a reweighting scheme, and solved by transferring the model into some alternating optimized subproblems which have exact solutions and guaranteed convergence.
After revision:  The dual-sparsity based non-rigid registration model is enhanced with a reweighting scheme, and solved by transferring the model into four alternately-optimized subproblems which have exact solutions and guaranteed convergence.