基于改进差分边缘检测法的车牌字符二值化算法

A Binarization Algorithm of Licence Plate Recognition Based on Improved LLT

针对车牌字符光照和污损的复杂特征,对车牌图象的二值化算法进行了深入的分析和研究,提出了一种基于差分边缘检测算法的改进图象二值化算法.实验结果表明,改进算法能够有效地将字符清晰地从背景中分割出来,分割速度快并且有助于提高字符识别的正确率.

According to the characteristic of license plate with complicated-background image, a new binarization algorithm based on improved LLT is presented here. Compared with other binarization methods, the result shows that this algorithm can make the character segmented from the background distinctly, effectively approve the speed and accuracy of vehicle license plate recognition.