Chapter 4

3D Moment Invariants to Translation, Rotation, and Scaling

Jan Flusser

Jan Flusser

Institute of Information Theory and Automation, Czech Academy of Sciences, Prague, Czech Republic

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Tomáš Suk

Tomáš Suk

Institute of Information Theory and Automation, Czech Academy of Sciences, Prague, Czech Republic

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Barbara Zitová

Barbara Zitová

Institute of Information Theory and Automation, Czech Academy of Sciences, Prague, Czech Republic

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First published: 28 October 2016
Citations: 2

Summary

Current medical imaging devices, such as MRI, f-MRI, CT, SPECT, and PET, provide us with full 3D images of the patient's body. Numerous 3D image processing algorithms are just extensions of the 2D versions by an additional dimension. In order to avoid numerical problems with geometric and complex moments, some authors proposed 3D invariants from orthogonal moments, such as Zernike moments and Gaussian-Hermite moments. The design of rotation moment invariants in 3D is much more difficult than in 2D. This chapter presents three alternative approaches in the sequel. The first one uses geometric moments, and the invariance is achieved by means of tensor algebra. The second one is based on spherical harmonics and can be viewed as an analogue to 2D complex moment invariants. The last one is a normalization approach. The chapter presents a survey of all existing reflection and rotation symmetries in 3D.

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