采用基于灰度质心法的径向截面扫描法对图像边缘进行亚像素级检测；
Applying the radial section scanning method based on gray centroid, the image edges are tested with a sub-pixel precision.
“散射点像元”质心的检测、跟踪和匹配；
Second, tracking and detecting 'the imaging cells of scattering points'.
新方法只需要检测每行的质心相对距离，从而实现了盲检。
The new scheme only needs to detect the relative distances of each line's centroid, in this way, it can realize blind detection.
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