| 郭建中,林书玉.超声检测中维纳逆滤波解卷积方法的改进研究[J].,2005,24(2):97-102 |
| 超声检测中维纳逆滤波解卷积方法的改进研究 |
| A modified Wiener inverse filter for deconvolution in ultrasonic detection |
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| 中文摘要: |
| 维纳逆滤波是利用解卷积技术提高超声检测纵向分辨率的算法之一。本文分析了其传统算法 对噪声适应性不理想的原因,提出一种改进方法,利用检测系统信噪比先验知识,进行频域解卷积处 理,在此基础上,对检测系统频带内的处理结果建模,插补估计出频带外受噪声干扰影响较大的数 据,然后再变换到时域。计算机模拟及相应实验结果表明,这些改进方法较为理想,具有较强的噪声 适应能力。 |
| 英文摘要: |
| Wiener inverse filter is one of the deconvolution methods to renew echo for improving the vertical resolution. This paper explains why the traditional algorithm is not stable, and then presents a modified algorithm to improve the problem, which is based on using a modified prior SNR and applying the spectrum extrapolation method to the date outside of the frequency band. Computer simulation and experimental observation show that this method of modification is feasible. |
| DOI：10.11684/j.issn.1000-310X.2005.02.008 |
| 中文关键词: 解卷积 维纳逆滤波 改进 |
| 英文关键词: Deconvolution Wiener inverse filter Modification. |
| 基金项目:陕西省自然科学基金资助项目(2004A08) |
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