论文采用边过程的思想，提出了一种基于目标区域边界像素表示的围线追踪算法。

This paper presents an improved contour-tracing algorithm, in which the contour is represented by the boundary pixels of the object.

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微软甚至还为屏幕阅读设计了几款字体，比如Georgia和Verdana，这些都是以像素边界为准则，它们在屏幕上看起来很美，但印出来则没什么性格。

Indeed Microsoft actually designed font faces for on-screen reading, like Georgia and Verdana, around the pixel boundaries; these are beautiful on screen but don't have much character in print.

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frame 命令创建了一个称为 .rc 的窗口，其边界宽度为 2 个像素。

The frame command creates a window called .rc with a borderwidth of two pixels.

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