调幅/调频图像的多小波分析

G. Metikas, S. Olhede
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引用次数: 3

摘要

我们考虑具有主导局部频率的图像的特征和分析:这一类包含二维信号,写成幅度和频率调制分量的和。我们介绍了用多向量值连续莫尔斯小波分析这类信号。我们计算图像的连续小波变换和相关尺度图,提取图像的局部幅度、频率和优势方向。对于被加性噪声污染的图像,我们使用具有最佳定位的几个正交母小波函数来估计图像的局部特征:这允许构建具有减少可变性和偏差的局部图像特征估计器
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiple wavelet analysis of amplitude/frequency modulated images
We consider characterisation and analysis of images with dominant local frequencies: this class contains two-dimensional signals written as sums of amplitude and frequency modulated components. We introduce the usage of the multiple vector-valued continuous Morse wavelets for analysis of such signals. We calculate the continuous wavelet transform and the associated scalogram of an image to extract its local amplitude, frequency and dominant orientation. For images contaminated by additive noise, we estimate the local features of the image using several orthogonal mother wavelet functions with optimal localisation: this allows for the construction of estimators of local image features with reduced variability and bias
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