How can I detect the mid-field line over the soccer field images ?

asked 2014-07-01 13:25:57 -0600

erogol
26 ●3

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Given the similar soccer field image, First, I need to detect the midfield line and more the merrier, I would like to learn the image projection for making the midfield line orthogonal evading the perfective distorion as if I am directly looking to the mid-field.

How can I apply those with OpenCV library?

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answered 2014-07-01 15:49:19 -0600

Witek

1156 ●1 ●9 ●19

For line detection, try adaptiveThreshold and then find lines with HoughLines. For perspective correction, you need to mark 4 points which relative real-world location you know and calculate homography. Finding 4 corners of half of the football field or the goal area would be good enough, but with this angle of view it will be quite unreliable.