虚圆点实际上是一退化的二次曲线。
重虚圆点四次曲线是很重要的一类高次平面曲线。
Bicircular quartic is a very important classics of higher plane curves.
提出一种基于图像边缘闭曲线拟合的虚警判据，能对潜在假目标进行准确的识别判断。
A false target criterion is introduced to distinguish between potential false objects and true beacon which based on the closed curve fitting of image edge.
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