shawshany / advance_lanefinding Goto Github PK

Hi, there. Thank you very much for sharing the code. I see the following lines for computing the meter per pixel, a necessary step to compute the curvature of the lane:

#merters per pixel in y or x dimension
ym_per_pix = 12/450
xm_per_pix = 3.7/911

But I cannot figure out how this is done. I also check the points for inverse perspective mapping matrix computing. I still cannot understand. Would you explain it? Thank you.