Deep Adaptive Log-Demons: Diffeomorphic Image Registration with Very Large Deformations

Algorithm 2

SURF/ELSTIX related registration framework.

Registration:

Input: Images , and initial velocity field

Output: Transformation from to

Pre-registration: through SURF related affine transformation or

ELASTIX to globally register and

Repeat

Demons registration:

 (i) Find updates mapping to

 (ii) Smooth updates:

 (iii) Update velocity field:

       (approximated with )

 (iv) Smooth velocity field:

 (v) Calculate traditional similarity metric SSD.

until convergence