TY  - JOUR
PY  - 2020//
TI  - Car speed estimation based on image scale factor
JO  - Forensic science international
A1  - Costa, Luciano R.
A1  - Rauen, Michelle S.
A1  - Fronza, Andressa B.
SP  - e110229
EP  - e110229
VL  - 310
IS  - 
N2  - Speed estimation by video analysis has been an increasingly common method for obtaining the speed of vehicles involved in traffic accidents. Generally, the estimate is based on reference measurements obtained on site or on measurements calculated by photogrammetric techniques. In this work, we proposed an alternative method for estimating the speed of a vehicle with longitudinal trajectory relative to the camera, either approaching it or moving away from it. The method uses the "image scale factor in pixels" to calculate the distance from the vehicle to the camera in different video frames, thus allowing the estimation of a vehicle's average speed. The results were verified by means of a simulation, with a vehicle moving at known speeds. The small deviation obtained supports the forensic use of the method in speed estimation by video analysis.<br><br>Copyright © 2020 Elsevier B.V. All rights reserved.<p />  <p>Language: en</p>
LA  - en
SN  - 0379-0738
UR  - http://dx.doi.org/10.1016/j.forsciint.2020.110229
ID  - ref1
ER  -