中文说明：采用的是脉冲对消法，是本科毕设的题目，采用累计贡献率的方法，音频信号通过LM386放大，包含特征值与特征向量的提取、训练样本以及最后的识别，可以提取一幅图中想要的目标。
English Description：
The is pulse cancellation method is undergraduate graduation design topic, using method of accumulative contribution rate, the audio signal by LM386 amplifier, contain eigenvalues and eigenvector extraction, training samples and the final recognition can be extracted from a piece of map to target.