二维窗函数的设计与应用

Design and application of 2D window function

中国地质大学地球物理与信息技术学院,北京 100083

Department of Geophysics and Intorma-tion Technology, China University of Geosciences, Beijing 100083, China

为了改善滤波效果,传统的二维滤波都是在变换域内加一个过渡带。根据在时间一空间域对冲激响应加时窗的方法,提供了几个二维窗函数,并给出二维窗函数应该满足的条件。实际资料处理结果表明,合理地选择窗函数能很好地改善滤波因子,提高资料的信噪比,同时也较好地保持反射信息的波形特性和振幅特征。

To improve filtering effectiveness, traditional 2D filtering generally adds a transition belt in the transform domain. Following the method that imposes window function on responses in time-space domain, we provide several 2D window functions and put forward the conditions those funcdons should meet. Real seismic data processing shows that proper 2D window function ensures more acceptable filter factor, which not only improves the signal-to-noise ratio of seismic data but also preserves the waveform and amplitude characteristics of reflection signals.