中文说明：人脸识别中的光照处理方法，BP神经网络用于函数拟合与模式识别，供做算法研究人员参考，脉冲响应的相关分析算法并检验，关于非线性离散系统辨识，最小均方误差等算法的MSE的计算。
English Description：
Light treatment method in face recognition, function fitting based on BP neural networks and pattern recognition, for research personnel, the impulse response of correlation analysis algorithm and test, identification of nonlinear discrete-time systems, minimum mean square error MSE of the algorithm calculation.