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首页> 外文期刊>IEEE Transactions on Pattern Analysis and Machine Intelligence >Wavelet approximation-based affine invariant shape representation functions
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Wavelet approximation-based affine invariant shape representation functions

机译:基于小波逼近的仿射不变形状表示函数

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摘要

In this paper, new wavelet-based affine invariant functions for shape representation are presented. Unlike the previous representation functions, only the approximation coefficients are used to obtain the proposed functions. One of the derived functions is computed by applying a single wavelet transform; the other function is calculated by applying two different wavelet transforms with two different wavelet families. One drawback of the previously derived detail-based invariant representation functions is that they are sensitive to noise at the finer scale levels, which limits the number of scale levels that can be used. The experimental results in this paper demonstrate that the proposed functions are more stable and less sensitive to noise than the detail-based functions.
机译:本文提出了一种新的基于小波的仿射不变函数来表示形状。与以前的表示函数不同,仅使用近似系数来获得建议的函数。通过应用单个小波变换来计算派生函数之一;另一个函数是通过对两个不同的小波族应用两个不同的小波变换来计算的。先前派生的基于细节的不变表示函数的一个缺点是它们对较小比例级别的噪声敏感,这限制了可以使用的比例级别的数量。本文的实验结果表明,与基于细节的功能相比,所提出的功能更加稳定,对噪声的敏感度更低。

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