解耦，恢复原信号，对信号进行频谱分析及滤波，到达过程是的泊松过程，车牌识别定位程序的部分功能，基于分段非线性权重值的Pso算法。- Decoupling, restore the original signal, The signal spectral analysis and filtering, Arrival process is a Poisson process, Part of the license plate recognition locator feature, Based on piecewise nonlinear weight value Pso algorithm.