改进传统BP算法提升机动车牌照字符识别性能

BP算法已广泛应用在机动车牌照识别系统中,但如何进一步提高车牌识别的速度和准确率是车牌识别系统最根本的问题。本文针对标准BP算法的不足,提出通过对作用函数进行修正、自适应调整迭代过程步长进行BP算法改进,对比分析改进前后BP算法在车牌识别技术中的应用,显示改进后的算法具有收敛速度快、识别时间短、识别率高等方面的优点,识别性能得到了很大优化。

Modifying Traditional BP algorithm for Better Vehicle License Plate Recognition Capability

BP algorithm has been widely applied to vehicle license plate recognition. However, this approach is challenged by the basic problem in the recognition system itself, that is, the accuracy of recognition. Aiming at the limitation of standard BP algorithm, this papers puts forward a method to improve the BP algorithm by modifying the action function and regulating the learning rate. A tested comparison shows that the improved algorithm is much more efficient in license plate recognition thanks to its fast convergence speed, rapid recognition ability and high recognition rate.