In this paper, an area formula of polygon of inscribed or circumscribed ellipse is presented and the condition that the area reaches maximum value or minimum value is discussed.

提出了椭园内接或外切多边形面积公式，并讨论了其面积达到最大值与最小值的条件。

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Then this paper proposed a user-defined template based on the minimum enclosing rectangle(MER) to complete the finally orientation, and found the center of the eyes using the area.

根据眼睛的构造提出了一种基于最小外接矩形的自定义模板来实现眼睛的最终定位并利用区域质心标定出了眼睛区域的中心位置。

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This paper discusses the problem of covering an ordered point set by a sequence of rectangles with minimum width in the area of computational geometry.

讨论了计算几何学中的矩形条覆盖问题，提出解决该问题的一个有效算法，并对提出的算法进行了分析。

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