[Progress Bars] Including them to show status of iterations for each parameter

[prerakmody]

Issue

• Working with large 3D volumes leads to a time consuming registration process.

Proposed Solution

• Having a progress bar (like tqdm) would be a useful indicator of how long the registration shall be running for
• The MaximumNumberOfIterations flag of the optimizer in the parameter files could be used to indicate the current status of each parameter.

Example

• The 3D CT, monomodal (for head and neck) preset contains two parameter maps
  • Rigid [with MaximumNumberOfIterations=250]
  • BSpline [with MaximumNumberOfIterations=1000]

Risks

• I am not sure if the iterations for the optimization process actually reaches the MaximumNumberOfIterations every single time.
• Though I have seen the following message in the logs

  • Time spent in resolution 1 (ITK initialization and iterating): 77.464 s. Stopping condition: Maximum number of iterations has been reached.