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- The application of de noising by soft thresholding on wavelet transform to ultrasonic detection echo is discussed. 研究小波变换软阈值去噪方法在超声检测回波处理中的应用。
- Three high frequency parts from wavelet transforms are turned into spherical coordinate, in which it applies the method to image de noising by the wavelet shrinkage parameters based on statistical characteristics. 该方法把线性小波变换后得到的 3个高频分量通过球坐标变换后 ;得到球坐标下 3个分量 ;然后在球坐标中根据图像统计特性设定的收缩因子处理小波收缩去噪 .
- In this paper,mean threshold is presented on which wavelet packet de noising is studied. 文中提出了平均阈值的概念 ;并在此基础上研究了小波包去噪的效果 .
- Then an improved method, namely translation invariant de noising was proposed. 在此基础上 ,探讨了对传统的阈值方法的改进 ,即平移不变小波变换去噪法。
- A low-complex automatic gain control (AGC) adjustment strategy by threshold comparison is proposed. 给出了一种低复杂性的阈值比较的自动增益控制(AGC)调整策略；
- This paper presented a new method based on nonlinear wavelet transform to image de noising. 提出一种新的非线性小波变换去噪方法 .
- After scanning the object image and labeling the connected component, the background and foreground noise could be removed easily by threshold value area expunction. 该方法仅需对图像作一次全扫描即可标记物体所有连通部分，统计标识号，根据阈值面积消除法即可快速去除图像中所有前景和背景噪声。
- In the end,the statistics of the operational volume of wavelet de noising is made. 最后对小波去噪的运算量进行了统计 .
- It has been proved that the wavelet packet de noising is an effective method prior to wavelet de noising. 仿真结果表明 ,基于平均阈值的小波包去噪是一种有效的去噪方法 ,其效果优于小波去噪
- The algorithm includes two major phases: 1）removing white noise and acnode noise by threshold segmentation and grayscale neighborhood property respectively; 该算法的主要步骤分两步：1）分别采用阈值分割和灰度邻域属性法消除白噪声及孤点噪声；
- In analytical chemistry,wavelet transform has been mainly utilized for signal smoothing,de noising and compression. 在分析化学领域中,小波分析也逐渐应用于去噪与平滑、数据压缩等方面。
- The result indicates that the wavelet transform has practical value in the performance of de noising and real time processing. 结果表明 ;小波变换在去噪性能和实时处理方面均具有实用价值 .
- Compared with[1],the proposed algorithm can be realized without the a priori knowledge about source directions and de noising preprocessing. 与文献 [1]不同 ;算法的实现不需要方位估计的先验知识和协方差矩阵的去噪预处理 .
- After making discrete stationary wavelet transform to an infrared image, de noising is done in the high frequency sub bands with better resolution. 对红外图像进行离散平稳小波变换后 ,对分辨率较好的各高频子带直接利用所提出的去噪方法去噪 ;
- To find the best scheme of wavelet de noising,various parameters that influence the performance of wavelet de noising are studied in this paper. 为了找到最佳的小波去噪方案 ;本文对各种影响小波去噪性能的参数作了比较研究 .
- Male crickets make a chirping noise by rubbing their front wings together. 雄蟋蟀以前翼相互摩擦而发出啁啾之声。
- Simulation tests are made to verify that the partial features of the original signal can be reserved after de noising via this method. 为了验证该方法可以在去噪的同时有效的保留原信号的特征分量 ,进行了模拟故障试验。
- This insect makes its strange noise by rubbing its back legs together. 这只昆虫将两只后腿反复摩擦发出一种奇怪的声音。
- This paper illustrates a method to de noise of radar weak signal. 通过建立尺度空间新内积、新范数的方法来构造新型小波变换 ;并且实现了用该系列小波变换对雷达弱信号去噪的目的 .
- This kind of method can detect some detailed anomalies those cannot be detected by threshold,and the compariso n between it and GLR test was given. 该检测方法比阈值方法有更强的检测功能,并与传统GLR测试方法进行对比。
