Inserting a line in a moving object

2021 9 6
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更新时间：2021 9 6
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I would like to insert a skeleton line that follows the movement of the tracked object.
The object is tracked using background subtraction.
Is such algorithm possible? If so how would I do it? A drawn red line example is shown in the following image below.

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Image Analyst
Image Analyst 2021-9-6
编辑：Image Analyst 2021-9-6

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Did you try calling plot() or rectangle()?
See attached demo.

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No I have not tried.
The demo shows the color tracking of the object but I was thinking whether you could insert line segments on the detected object and follow its movements?

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