| Y. Avrithis, Y. Xirouxakis and S. Kollias |
| Affine-Invariant Curve Normalization for Object Shape Representation, Classification and Retrieval |
| Machine Vision and Applications, Springer Verlag, Vol. 13, Issue 2, 2001, pp. 80-94. |
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ABSTRACT
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| A novel method for two-dimensional curve normalization with respect to affine transformations is presented in this paper, allowing an affine-invariant curve representation to be obtained without any actual loss of information on the original curve. It can be applied as a pre-processing step to any shape representation, classification, recognition or retrieval technique, since it effectively decouples the problem of affine-invariant description from feature extraction and pattern matching. Curves estimated from object contours are first modeled by cubic B-splines and then normalized in several steps in order to eliminate translation, scaling, skew, starting point, rotation and reflection transformations, based on a combination of curve features including moments and Fourier descriptors.
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| 01 January , 2001 |
| Y. Avrithis, Y. Xirouxakis and S. Kollias, "Affine-Invariant Curve Normalization for Object Shape Representation, Classification and Retrieval", Machine Vision and Applications, Springer Verlag, Vol. 13, Issue 2, 2001, pp. 80-94. |
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