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单词 Shearlet
释义

Shearlet

中文百科

剪切小波

抛物线缩放和剪切的几何效果,使用一些不同参数a和 s.
Shearing
典型剪切小波所产生之梯形频率.典型离散剪切小波系统的频率拼接.
Classical shearlet frequency tiling

在应用数学的分析方面,剪切小波是一个多尺度的架构,且在多变量问题中能高效率编码有各向异性的特点。起初,为了分析及稀疏近似多维方程序f \in L^2(\R^2),剪切小波在2006年被提出。剪切小波是小波分析的自然延伸,可以适应有各向异性特点的多元方程序,像是影像的轮廓、边缘。然而,各向同性的小波是不能得到此现象。

把抛物线的缩放、剪切、平移施加在数个生成函数后可建构出剪切小波。虽然所建构出的剪切小波不能建构出在空间L^2(\R^2)中的正交基底,它们仍然可以形成一个架构,且能允许任意函数的稳定扩张。

剪切小波具有以下几个重要性质:

剪切小波是迄今为止唯一有方向性且提供各向异性特点的稀疏估计的表现系统,可扩展至L^2(\R^d), d \ge 2的剪切小波系统。理论的全面介绍和剪切小波的应用可以在中看到。

英语百科

Shearlet 剪切小波

Geometric effects of parabolic scaling and shearing with several parameters a and s.
Shearing
Trapezoidal frequency support of the classical shearlet.Frequency tiling of the (discrete) classical shearlet system.
Classical shearlet frequency tiling

In applied mathematical analysis, shearlets are a multiscale framework which allows to efficiently encode anisotropic features in multivariate problem classes. Originally, shearlets were introduced in 2006 for the analysis as well as sparse approximation of functions f \in L^2(\R^2). They are a natural extension of wavelets to accommodate the fact that multivariate functions are typically governed by anisotropic features such as edges in images, however, wavelets as isotropic objects are not capable of capturing such phenomena.

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更新时间:2025/6/20 15:39:12