Table 1.

Summary of the parameters required to determine the step size for the optimizer

Type		Rigid					Elastic
Resolution (in number of pixels)		16	8	4	2	1	8	4	4	2	2
No of iterations		4096	2048	1024	512	256	4096	2048	1024	512	256
Gradient descent parameters	a			4000			2000	7000	20000	20000	30000
	A			50					50
	$\alpha$			0.6					0.602