Abstract:

Because of the influence of illumimation changes and insurfficient light, license plate location is much more difficult and has lower accuracy. The phase consistency was used for extracting the image edge information, and character texture was used for extracting the plate area in image. Using vertical projection to get the one-dimensional signal of scanning plate area. The interference of noise is filted out by using the wavelet multi-resolution characteristics. Finally, using statistic characteristics of license plate to extracte it. The simulation results show that the the accuracy of this algorithm can achieve 96% in the illumination and low light environment.

Key words: phase congruency, license plate location, wavelet reconstruction