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简介小波变换的基本原理，给出 Ｍａｌｌａｔ 塔式算法的公式。采用小波变换的方法进行交通事件检测， 并给出了利用小波变换进行交通事件检测方法的程序流程图。利用实际数据进行了分析，分析结果表明小波分析用于交通流数据分析有其优越之处。
The basic principle of wavelet transform is introduced, and the formula of Mallat tower algorithm is given. The method of wavelet transform is used to detect traffic events, and the flow chart of the method of detecting traffic accidents using wavelet transform is given. The actual data were used to analyze the results. The analysis shows that the wavelet analysis has its advantages for traffic flow data analysis.