Set best guess registration parameters based on input properties

[cpinter]

Register plugin in subject hierarchy allows selecting two input volumes and the main registration method, which saves the user more than half the user interactions needed. However, more detailed parameter setting would be possible based on the image modalities and possibly other image properties. These settings could be stored in parameter set nodes that are deployed in the SlicerRT install tree, and loaded on demand when certain conditions are met after selecting the two input volumes and the registration method.

Migrated from https://app.assembla.com/spaces/slicerrt/tickets/582-set-best-guess-registration-parameters-based-on-input-properties/details

[cpinter]

Registration case llibrary: http://www.na-mic.org/Wiki/index.php/Projects:RegistrationDocumentation:UseCaseInventory

• Add description there
• Make sure all cases are handled well by this function
• Add RT-related cases (CT-CBCT etc.)

[cpinter]

Input image complexity could also be measured