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2. An extremum principle for shape from contour;Brady;IEEE Trans. Pattern Anal. Mach. Intell. PAMI,1984
3. A Tensor Operator Method for Identifying the Affine Transformation Relating Image Pairs;Cyganski,1983
4. S. A. Friedberg, Symmetry Evaluators, Tech. Rep. 134, Computer Science Department, University of Rochester, revised January 1986.
5. Mapping Image Properties into Shape Constraints: Skewed Symmetry, Affine-Transformable Patterns, and the Shape-from-Texture Paradigm;Kanade,1980