نتایج جستجو برای: 3 d transform
تعداد نتایج: 2310569 فیلتر نتایج به سال:
S U M M A R Y In this paper we derive 2.5-D short-period seismic modelling and imaging-inversion formulae in the Born approximation for anisotropic elastic media. The 2.5-D approach encompasses 3-D wave scattering measured in a common-azimuth acquisition geometry subject to 2-D computations under appropriate assumptions. The lowest possible symmetry of the medium in this approach, in principle,...
A new method is presented for fully automated regional quantification of the human neo-cortical thickness from 3-D MR images. The method does not require explicit extraction of the cortical surface, but instead is based on a geodesic distance transform of the binarized 3-D volumetric gray matter map obtained by automated segmentation. Regional cortical thickness distributions are derived by atl...
We calculate the F/D ratios of spin-nonflip baryon vertex for an arbitrary number of color degrees of freedom Nc both in the non-relativistic quark model with the SU(6) spin-flavor symmetry and in the chiral soliton model with SU(3) flavor symmetry. We find that the spin-nonflip F/D ratio tends to −1 in the limit of Nc → ∞. We show that this leading value F/D = −1 of spin-nonflip baryon vertex ...
This article describes useful theory and techniques for evaluating the dynamic performance of A/D converters. Four techniques are discussed: (1) beat frequency, (2) histogram analysis, (3) sine wave curve fitting, and (4) discrete finite Fourier transform.
3-D wavelet-based scalable video coding provides a viable alternative to standard MC-DCT coding. However, many current 3-D wavelet coders experience severe boundary effects across GOP boundaries. This paper proposes a memory efficient transform technique via lifting that effectively computes wavelet transforms of a video sequence continuously on the fly, thus eliminating the boundary effects du...
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