Biorthogonal Loop-Subdivision Wavelets

Biorthogonal Loop-Subdivision Wavelets
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DOI:
10.1007/s00607-003-0044-0
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发表时间:
2004-04
期刊:
影响因子:
3.7
通讯作者:
M. Bertram
M. Bertram
中科院分区:
计算机科学3区
文献类型:
--
作者:
M. Bertram

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基于提升格式,我们提出了一种用于Loop细分的双正交小波构造。我们的小波变换使用由Loop细分为任意流形三角形网格递归定义的尺度函数。我们关于局部尺度函数正交化我们的小波。这样,当降低分辨率并将几何细节转换为稀疏小波系数时,小波分析会在局部计算最小二乘拟合。我们的方法的贡献是在线性时间内进行局部计算、小波分析和综合。我们给出的数值例子支持我们方案的稳定性。
We present a biorthogonal wavelet construction for Loop subdivision, based on the lifting scheme. Our wavelet transform uses scaling functions that are recursively defined by Loop subdivision for arbitrary manifold triangle meshes. We orthogonalize our wavelets with respect to local scaling functions. This way, the wavelet analysis computes locally a least squares fit when reducing the resolution and converting geometric detail into sparse wavelet coefficients. The contribution of our approach is local computation of both, wavelet analysis and synthesis in linear time. We provide numerical examples supporting the stability of our scheme.