图像边缘检测方法在地震剖面同相轴自动检测中的应用研究

The study of application of edge measuring technique to the detection of phase axis of the seismic setion

为了提高地震剖面的信噪比和分辨率,使同相轴容易识别和追踪,便于地震资料解释,应用图像边缘检测方法检测地震剖面的同相轴.通过对比各种边缘检测方法对地震剖面的边缘检测效果,确定使用Canny算子对地震剖面进行边缘检测.但边缘检测的结果是灰度突变区域的包络线,并不能直接作为同相轴检测结果.根据地层反射同相轴灰度值较大这一特性,提取强灰度包络线的中轴作为同相轴的检测追踪结果,得到了正确的同相轴检测结果.并经过消除检测结果中的斑点边缘后,使同相轴显示更加清晰.

In order to enhance the signal-to-noise ratio and resolution of seismic section.detect phase axis and explain seismic section, using edge measuring technique to detect phase axis of seismic tection. Through contrast of the result of different edge measuring operator, we find the canny operator is good at seismic section edge measuring. But the result of edge measuring is just surround line of the break of gray and not the result of detection of phase axis. The gray of seismic phase axis is higher, so we sue the median axis of the surround line of the higher gray as the seismic phase axis and we get the right result. And after eliminating fleck yawp, the seismic phase axis is clearer.