## Abstract A new approach to approximate the 3βD shape of multiple sclerosis (MS) lesions and to calculate their volumes is presented. The suggested method utilizes sets of MS lesion contours taken from segmented MR images and approximates their 3βD surfaces by spherical harmonics. This method was
Determination of the Orientation of 3D Objects Using Spherical Harmonics
β Scribed by Gilles Burel; Hugues Henoco
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 502 KB
- Volume
- 57
- Category
- Article
- ISSN
- 1077-3169
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β¦ Synopsis
The paper describes a method for estimation of the orientation of 3D objects without point correspondence information. It is based on decomposition of the object onto a basis of spherical harmonics. Tensors are obtained, and their normalization provides the orientation of the object. Theoretical and experimental results show that the approach is more accurate than the classical method based on the diagonalization of the inertia matrix. Fast registration of 3D objects is a problem of practical interest in domains such as robotics and medical imaging, where it helps to compare multimodal data. 1995 Acarenic Press, Inc.
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