[ITK] Metric Evaluation

[wassim bouzeid]

Hi Everyone,

I want to explore the domain of an image metric by exhaustive search (moving the second image with respect to the first image from a negative position to a positive position) so I am using the example in the source code MeanSquaresImageMetric1.cxx on 2D images. The time to compute the metric value for a specified parameters on these 2D images is approximately 0.02 sec. (PC with 32000 MB memory, and 1 cores @ 3201 MHz). 

When I am applying this example to 3D nifti images, the computation time of the metric value is large (more than 5 sec.).

Does anyone know how to speed up the computation time on 3D images without using an optimizer?

Thanks in advance.

Best,
Sam

 		 	   		  
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