CHAPTER 3
METHODOLOGY AND APPROACH
3.1 Introduction
This chapter will discuss on how the LPR system developed using median filter,
adaptive threshold, canny edge detection and morphology process for image preprocessing.
Also, template matching is used for character recognition. GUI will be
developed using MATLAB and the main function of the GUI is to recognize the license
plate number from input images and input videos. Different resolutions of input image
are taken to do the recognition experiment. All recognized plate number will be record in
the text file. Besides that, LPR system is only available for slow moving vehicles (less
than 20KM/h). Figure 3.1 shows the overall algorithms of the pre-processing in this
project whereas Figure 3.2 shows the overall algorithms of the character extraction and
recognition in this project.