Symmetries of 1-D images
The possible automorphism groups of scalar functions of a one-dimensional Euclidean domain are presented. The groups are determined relative to a class of transformations that allow an isometry of the function domain, simultaneous with a separate isometry of the function co-domain. Ten non-trivial automorphism groups are found. Seven of these are related to five of the seven Frieze groups.
image structure group theory visual perception image features