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Distance Between Parallel Lines

Length of a perpendicular segment between them.

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Distance Between Parallel Lines
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RWA Distance Between Parallel Lines


Calibrating High Security Cameras


  • Distance Between Parallel Lines

Student Exploration

Can the distance between parallel lines tell an intelligent video surveillance system what to look and what to ignore?

See it in action here:

To properly calibrate an intelligent video surveillance camera “most manufacturers go for a little trick and introduce the concept of "markers of height." To calibrate the user in most cases, you must specify only a couple of markers, marking the height of one and the same object at different distances from the camera lens, as well as giving the actual height of the marked object.”

Read more here: http://synesis.ru/en/surveillance/contents/25d-space

Extension Investigation

Layering (optional)

E traverses his sister:

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