Abstract
Image moment is an important technique for pattern recognition. But, invariants constructed with high-order moments are sensitive to noise. Only a few invariants with low-order moments can be used in practice. In this paper, the definition of traditional moment is reviewed in polar coordinate system. Polar radius moment (PRM), which is defined by a linear combination of integrals on the symmetrical polar radiuses in an image, is proposed. Traditional moment is only a special case of PRM. Algorithm is developed to construct affine invariants with PRMs. In particular, the first-degree PRM is considered as the generalization of the zero-order moment. It can be used to construct affine invariants directly. The third-degree PRM can be viewed as the generalization of the second-order moment. Consequently, more invariants can be constructed with low-order (degree) moments. The experimental results also show that invariants with low-degree PRMs are more robust to noise.
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This work was supported in part by the National Science Foundation Under Grants 42275160, 61572015.
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Yang, J., Liu, C. & Li, F. Polar radius moment with application for affine invariants. Pattern Anal Applic 26, 529–542 (2023). https://doi.org/10.1007/s10044-022-01128-6
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DOI: https://doi.org/10.1007/s10044-022-01128-6