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Talks given at NuHAG events

Spherical Continuous Wavelet Transforms arising from sections of the Lorentz group


  Milton Ferreira

  given at  strobl07 (18.06.07 16:15)
  id:  563
  length:  25min
  status:  accepted
  type:  talk
  LINK-Presentation: 
  ABSTRACT:
We consider the conformal group of the unit sphere $S^{n-1},$ the Lorentz group $Spin^+(1,n)$ (double covering group of the proper Lorentz group $SO_0(1,n)$) for the study of spherical continuous wavelet transforms (SCWT). The parameter space is determined by a factorization of the gyrogroup of the unit ball by an appropriate gyro-subgroup. We define admissible local and global sections and we study some families of sections that give rise to SCWT. These SCWT extend the SCWT of J.P. Antoine and P. Vandergheynst , which itself arises from the fundamental section of our homogeneous space.
The advantage of these new SCWT is that they incorporate relativistic movements on the unit sphere which are suitable for signal processing on the unit sphere.


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