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The main concepts that image registration involves are transformation and similarity. Care must be taken, however, when choosing a proper methods for each. By identifying some valuable properties that ought to be preserved, one can put together a sensible registration scheme.
There is yet little agreement on the power of each of the existing methods and comparisons are often biassed. Pointers will be provided to additional methods and approaches in later sections. Also, several possible results and comparisons will be proposed.