TY  - JOUR
PY  - 2017//
TI  - A novel pixel-based method to estimate the instantaneous velocity of a vehicle from CCTV images
JO  - Journal of forensic sciences
A1  - Liu, Shengxiong
A1  - Yang, Xiuju
A1  - Cui, Jianguo
A1  - Yin, Zhiyong
SP  - 1071
EP  - 1074
VL  - 62
IS  - 4
N2  - In traffic forensic identifications, it was usually unfavorable that estimated velocities of questioned vehicles derived from frame-based methods eventually turned out to be close to but a bit less than speed limits. In this paper, a novel pixel-based method was presented to estimate vehicles' relatively instantaneous velocities. First, two adjacent pixels' actual distance was acquired from the closed-circuit television (CCTV) images. Then, the instantaneous average velocity within this one frame interval time (FIT) was calculated out. The frame-based method and its evaluating result were also introduced in this paper. The results showed that the velocity estimated by this new pixel-based method was higher than which derived from the frame-based method. Employing this presented novel method in these cases, it could be more accurately identified whether or not the vehicles had exceeded the speed limits, and then the responsibilities could be consequently assigned impartially.<br><br>© 2017 American Academy of Forensic Sciences.<p />  <p>Language: en</p>
LA  - en
SN  - 0022-1198
UR  - http://dx.doi.org/10.1111/1556-4029.13381
ID  - ref1
ER  -