因为相对于单一的背景，他有一个边缘分明的外观，所以，使用多边形套索工具选取他是十分容易的。

As he is a hard edged surface against a flat background it should be fairly easy to select him using the Polygonal Lasso Tool.

youdao

本文研究了多种红外目标运动跟踪算法，结合本系统红外目标特性与图像背景特性，选取了适合本系统的算法。

According to the characters of the infrared target and the background figure, kinds of infrared target tracking algorithms are studied, and the suitable ones are selected.

youdao

在编辑区域中，未被选取的文字的背景颜色。

Background color for unselected text in the editing area.

youdao