Because roof edge is different from step edge, their detection methods are different.

由于屋脊边缘的特点不同于阶跃边缘，他们的检测方法也不同。

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The proposed model is based on an ideal step edge; therefore, it will be improved to fit other kinds of edges.

由于该模型只是基于理想的阶跃边缘，故对于其他类型的边缘的定位尚有待进一步研究。

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This step is tricky; you have to drag the view onto the left edge of the pane.

这个步骤要注意技巧；必须将视图拖到面板的左边缘上。

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But among the tasks the machine can perform in a single step are edge detection, inversion, the identification of lines and shapes of different orientations, and the filling-in of concave shapes all things that are useful in image-processing, and not all of which can be managed by digital technology.

ECONOMIST: Analogue computing

So, in this upcoming week, can you step to the edge of your circle to meet some unusual people?

FORBES: The Unusuals Innovate!

It's barely visible today and, should you step over the edge, it'd take you 12 seconds to hit bottom.

FORBES: Magazine Article