Median filter technology is a non-linear technology that can preserve image edge while removing noise. It is used in many fields widely, e. g. image enhancing and restoration.
中值滤波技术是一种在去除噪声的同时能较好保护图像边缘细节的非线性技术，在图像增强和恢复等领域中得到了广泛的应用。
There are two main tasks while processing the pictures – to drag the maximum details from the usually dim objects and noise removing.
处理照片有两大任务——从普遍黯淡的天体里提取最多的细节，以及去除噪点。
The task of a phase-lock receiver is to reproduce the original signal while removing as much of the noise as possible.
锁相接收机的作用是重建原信号而尽可能地去除噪声。
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