摘要:地震波初至时间的检测是地震信号处理中的一个重要环节。在地震波接收记录上 ,初至波振幅大于噪声振幅 ,初至时间位于纯噪声信号与地震有效信号和噪声之叠加信号之间的分界处。根据这些特征 ,本文把地震信号幅值数据处理成 256级灰度图 ,再把灰度图二值化 ,然后通过检测二值图像的边缘 ,获得地震波的初至时刻。对于存在较多的连续异常记录道 ,或其它强干扰信号的地震波记录 ,提出了二次或多次用不同阈值对图像进行二值化的检测方法。对实际地震记录的处理表明 ,本文方法具有较高的精度和效率。Abstract: This paper discusses a new method of first arrival p icking . The method is based on i mage p rocessingmethods . It is p ro2posed for the purpose of aut omatic and accurate p icking of large v olumes of first arrival p icks for refracti on static analysis . Thefirst step converts the seismic data int o a grey i mage . The second step converts the grey scale i mage t o a binary i mage . At lastsi mp le secondary p ick l ogic can be emp l oyed t o calculate a final p ick ti me . In the course of p icking, the paper discusses a newmethod t o influence the accuracy of p icking first arrival, converts the grey scale i mage t o more than 2 binary i mages by differentthreshold value . The experi mentati on has p r oven that the new method has great speed and efficiency .
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机译：摘要:地震波初至时间的检测是地震信号处理中的一个重要环节。在地震波接收记录上 ,初至波振幅大于噪声振幅 ,初至时间位于纯噪声信号与地震有效信号和噪声之叠加信号之间的分界处。根据这些特征 ,本文把地震信号幅值数据处理成 256级灰度图 ,再把灰度图二值化 ,然后通过检测二值图像的边缘 ,获得地震波的初至时刻。对于存在较多的连续异常记录道 ,或其它强干扰信号的地震波记录 ,提出了二次或多次用不同阈值对图像进行二值化的检测方法。对实际地震记录的处理表明 ,本文方法具有较高的精度和效率。Abstract: This paper discusses a new method of first arrival p icking . The method is based on i mage p rocessingmethods . It is p ro2posed for the purpose of aut omatic and accurate p icking of large v olumes of first arrival p icks for refracti on static analysis . Thefirst step converts the seismic data int o a grey i mage . The second step converts the grey scale i mage t o a binary i mage . At lastsi mp le secondary p ick l ogic can be emp l oyed t o calculate a final p ick ti me . In the course of p icking, the paper discusses a newmethod t o influence the accuracy of p icking first arrival, converts the grey scale i mage t o more than 2 binary i mages by differentthreshold value . The experi mentati on has p r oven that the new method has great speed and efficiency .
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