Meters to Pixel Conversion

[drofp]

How were the meters to pixel values found in line_fit.py?

I'm assuming the standard width of a highway lane (3.7m) was used for the x-direction, and you simply found the difference of x-values between the two lanes after the polyfit.

I am still unsure, however, of how you found the y-direction values. Did you measure out the length to the horizon? or is this the vertical length that can be detected by polyfit? What was your procedure for calibrating and finding these values?

advanced_lane_detection/line_fit.py

Line 231 in d9be934

ym_per_pix = 30/720 # meters per pixel in y dimension