According to the characteristics of radar image, a method of image segmentation is suggested by performing threshold processing directly after edge detection instead of close curves.

根据雷达图像的特点提出边缘检测后不做曲线闭合，而直接进行阈值处理的图像分割。

youdao

After making a stop for a few hours at a British station on the edge of Antarctica, the two workers were flown to the southernmost Chilean city of Punta Arenas.

在南极洲边缘的一个英国站停留了几个小时后，这两名工人坐飞机到了智利最南端的城市，蓬塔阿雷纳斯。

youdao

At the edge of darkness, after about eight hours, I turned around and saw the Earth from our altitude at Hubble, 568 kilometers up.

在黑暗的边缘，大约8个小时后，我转过身来，从哈勃望远镜上看到了568公里高处的地球。

youdao

The water reached the northern edge of Sumatra about twenty minutes after the earthquake.

VOA: special.2009.03.17

With counting under way in the north, the party's ambitions are on a knife edge after a dramatic night of results.

BBC: Vote 2011: Labour assembly majority is on a knife edge

The Islanders had a 22-11 edge in shots on goal at that point, and they extended their edge after two periods to 28-13.

WSJ: Penguins End Islanders' Season

Earls, who has just turned 21, has been in electric form for Munster this season after failing to edge his way into the team last season.

BBC: Full-back Earls gets Ireland call