How to get the orientation of a edge of a marker?

Asked Jun 09 '22 at 06:25

Active Jun 09 '22 at 06:25

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I have the following input image:

I need to get the orientation of the edges of the markers and draw them into the picture. This would be the result I need:

How can I achieve this? I want to use the whole edge instead of only two corner points for calculating the line/orientation of the marker edge for higher accuracy.

asked Jun 09 '22 at 06:25

michael

Each marker has four edges. How do we know which one you're interested in? – Cris Luengo Jun 09 '22 at 06:54
I am interested in the lower edges of the two markers on the left hand side and I am interested in the left edges of the upper two markers – michael Jun 09 '22 at 07:16
It looks like resemble to https://stackoverflow.com/questions/72148782/ – fana Jun 10 '22 at 02:20
Have a look at the [Hough Line Transform](https://docs.opencv.org/3.4/d9/db0/tutorial_hough_lines.html) – code-lukas Jun 10 '22 at 16:44

How to get the orientation of a edge of a marker?

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