IMPROVING EXTRACTION OF IMPULSE RESPONSE FUNCTIONS USING STATIONARY WAVELET SHRINKAGE IN TERAHERTZ REFLECTION IMAGING
IMPROVING EXTRACTION OF IMPULSE RESPONSE FUNCTIONS USING STATIONARY WAVELET SHRINKAGE IN TERAHERTZ REFLECTION IMAGING
复制标题
利用太赫兹反射成像中的稳态小波收缩改进脉冲响应函数的提取
DOI：
10.1142/s0219477510000319
复制
发表时间：
2010-12-01
影响因子：
1.8
通讯作者：
Pickwell-Macpherson, Emma
中科院分区：
文献类型：
--
作者：
Chen, Yang;Sun, Yiwen;Pickwell-Macpherson, Emma
在太赫兹成像中，通常进行反卷积以提取感兴趣样本的脉冲响应函数。反滤波过程放大了噪声，本文研究了如何在不过度平滑和丢失有用信息的情况下抑制噪声。我们利用平稳小波收缩理论提出了一种鲁棒的反卷积过程，它比其他流行的方法（如双高斯滤波）有显著的改进。我们用水和异丙醇的实验数据证明了这种方法的成功。
In terahertz imaging, deconvolution is often performed to extract the impulse response function of the sample of interest. The inverse filtering process amplifies the noise and in this paper we investigate how we can suppress the noise without over-smoothing and losing useful information. We propose a robust deconvolution process utilizing stationary wavelet shrinkage theory which shows significant improvement over other popular methods such as double Gaussian filtering. We demonstrate the success of our approach on experimental data of water and isopropanol.