以下为句子列表：
英文: An image denosing method which combine wavelet packet transform with median filter used in the system of the online measuring of pellets diameters was presented.
中文: 提出了一种将小波包变换和中值滤波相结合的球团矿图像去噪方法。
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英文: In order to better detect the image edge information, firstly, non-linear median filter technology of characteristic direction was applied to filter out the Gauss noise; secondly, (3,1) biorthogonal spline wavelet was used as the primitive wavelet filter,
中文: 在激光探测系统中，微弱的回波图像淹没在强背景噪声中，为更好地检测这类含噪图像的边缘信息，首先应用特征方向非线性中值滤波技术，滤去高斯噪声；其次，选择(3,1)双正交样条小波作为原始小波滤波器，采用提升方案构造最优双正交小波滤波器，应用构造的双正交小波进行多尺度小波边缘检测；同时，通过定义浮动阈值，并应用于图像边缘检测，较准确地定位了边缘位置。
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