How do you calculate pixel to mm in this projects? about vehicle_speed_estimation HOT 6 CLOSED

@zaiplanet Hello,
That is from Korean formats of lines on the road.
The white line should be 8 meters and the space between white lines should be 12 meters at the highway, Korea.

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@zaiplanet
You should know the real-world length between two points. Then you can get each point's pixel coordinates.
The formula is very simple you can understand it via the below picture.

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if i set custom polygon area detect, can i calculate to pixel from this area? ^^

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@zaiplanet Yes, if you set new areas, you should be updated that parameters.

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@swhan0329
i try set 2 custom polygon below:
pg1 = np.array([[490, 400], [380, 400],[260, 470], [410, 475]])
pg2 = np.array([[412, 475], [490, 400], [595, 400], [570, 480]])

How will i update that parameters ? Do you tell me calculate formula?
Thanks you.

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@swhan0329
I understand^^ . Thank you so much for your support

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