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HelpMe: A Heuristic License Plate Correction
Method for Big Data Application
Guochao Jia, Xu Tao, Yan Liu, and Wanchun Dou
State Key Laboratory for Novel Software Technology, Nanjing University
Nanjing, 210023, P.R.China
{
jackjianju,wondertx,zizhuoy
}
@gmail.com
douwc@nju.edu.cn
Abstract.
Serving as a critical feature of vehicle flow in Intelligent
Transportation System (ITS) of Smart City, license plate information
has been applied in many momentous transportation applications. How-
ever, ITS suffers from the low accuracy of license plate recognition due
to changeful and uncontrollable environment and machinery malfunc-
tion from tra
c equipment deployed on a large scale. Therefore, it is
challenging for license plate recognition to satisfy high accuracy and low
latency in the condition of large-scale trac data sets. In this paper, a
Heuristic License Plate Correction Method, named HelpMe, is proposed
to address the challenges above. It aims at recognizing and correcting
the incorrect license plate information in real-time with high accuracy.
Technically, a heuristic method is adopted to guide the correction pro-
cess. Moreover, in order to process the large-scale data sets eciently,
HelpMe is implemented on HANA cluster (an in-memory database). Fi-
nally, extensive experiments are conducted on a real-world data set to
evaluate the feasibility and eciency of HelpMe.
Keywords:
Intelligent Transportation System, license plate recognition
and correction, heuristic method, in-memory database, big data applica-
tion
1
Introduction
Recent years have witnessed an explosive growth of trac data which is col-
lected by diversiform devices and sensors such as cameras, RFID tags, vehicle
GPS trackers and so on. These large data sets, so-called “Big Data”[1,2], have
a strong influence on both academia and industry. In order to cope with com-
plex and changeable trac situation, Smart City comes into being [3,4,5,6]. Cur-
rently, many Chinese cities have made a considerable development in the process
of Smart City construction, especially in ITS [7,8]. Hundreds of Smart Base Sta-
tions (SBSs) have been built along the primary road in urban areas. The SBS is
an advanced monitoring device equipped with HD cameras and sensitive RFID
readers. Not all vehicles are equipped with RFID tags, especially non-local ones.
Corresponding author.
