针对织物图像斑点噪声的特点，采用了一种新的图像边缘检测方法。
There is a kind of noise called speckle in fabric images, so a new kind of edges detection method is adopted.
其原因主要是超声图像本身分辨率、对比度较低，以及固有的斑点噪声的影响。
The main reason is that the resolution and contrast degree of the ultrasonic image itself is very low as well as the influence of intrinsic speckle noises.
相干斑点噪声是SAR影像的重要特征之一。
Speckle is one of the most important characters of SAR image.
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