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AI-TRAFFIC
AI-ROAD 3D
Sensor width: This value can be obtained from the cameras datasheet and is given as a fraction of inches
(e.g. 1/1.8’’ is 7.18 mm)
A table for the conversion in millimeters is available here: https://en.wikipedia.org/wiki/Image_
sensor_format.
AI-ROAD 3D: 3D calibration – Step 3 - Case B
This way to perform the calibration is the most comfortable but AI-ROAD 3D: 3D calibration – Step 3 -
Case A, p. 111 in general is more accurate.
Draw a reference line (yellow) and give a reference length
Fig. 77: Draw a reference line (yellow) and give a reference length
As shown in the image belowt, you can draw a reference line parallel to the motion direction and give the
real length in meters of the line
Be careful that the lines are drawn with accuracy, since an error in this step may negatively affect
the results of the calibration.
Fig. 78: Draw a reference line (yellow) and give a reference length
112 / 153
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