In this study, the authors present a simple method to estimate intrinsic and extrinsic parameters of the camera for roundabout traffic scenes. Unlike many previous works on camera calibration for roadway scenes by using parallel lines, the proposed work addresses camera calibration for roundabout scenes by using a circle. The proposed method can estimate focal length, pan angle, tilt angle and camera height by matching the ellipse equation extracted from an image with the perspective-transformed equation of the corresponding real-world circle. This method requires only one image for camera calibration. The method is validated with real-world roundabout traffic scenes and the calibration results are reasonably accurate compared with ground truth measurements.
Simple method for camera calibration of roundabout traffic scenes using a single circle
IET Intelligent Transport Systems ; 8 , 3 ; 175-182
2014-05-01
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
ground truth measurements , pan angle estimation , roundabout traffic scene camera calibration , camera intrinsic parameters , camera height estimation , focal length estimation , perspective-transformed equation , cameras , ellipse equation matching , road traffic , parameter estimation , traffic engineering computing , feature extraction , camera extrinsic parameters , image matching , calibration , natural scenes , tilt angle estimation
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