Creates objects of class SimilarityTransformation from control points or directly from parameters
data.frame containing control point coordinates arranged in four (4) columns: X source, Y source, X target, Y target.
A vector of four (4) parameters for representing the
transformation, namely: a, b, c and d, where
Both controlPoints and parameters are optional, but one has to be given. In the case of the latter, the name of the argument has to be specified, e.g., SimilarityTransformation(parameters=c(1,2,3,4))
Object of the class SimilarityTransformation
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