中文说明：在超声图像去噪是具有挑战性的，由于散斑效应不易建模。设计一个有效的斑点减少滤波器。我们提出的方法obnlm。
English Description：
In ultrasound imaging, denoising is challenging since the speckle artifacts cannot be easily modeled. to design an efficient speckle reduction filter. we propose this method OBNLM.