Automated mapping of local layer slope and tracing of internal layers in radio echograms
Automated mapping of local layer slope and tracing of internal layers in radio echograms
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DOI：
10.3189/2014aog67a048
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发表时间：
2014
影响因子：
2.9
通讯作者：
C. Panton
中科院分区：
文献类型：
--
作者：
C. Panton
摘要本文提出了一种无线电回波图分层自动跟踪方法。该方法被设计为与大多数无线电回声测深回波图，并已成功地测试了180-210兆赫多通道相干测深仪。为了准确地跟踪层，首先通过积分由倾斜滤波器的强度响应推断的局部层斜率来计算近似层位置，然后使用迭代优化来细化位置。使用活动轮廓模型或蛇跟踪层，其可以被约束以保存回波图特征和平滑层。利用这种技术，可以追踪几百公里以外的内部层。该方法进行了测试之间的两个格陵兰岛深冰芯的年龄-深度关系是已知的。
Abstract An automated method is presented for tracing layers in radio echograms. The method is designed to work with most radio-echo sounding echograms and has been successfully tested with a 180–210 MHz multichannel coherent depth sounder. To accurately trace layers, first approximate layer positions are calculated by integrating the local layer slope which is inferred by the intensity response to a slanted filter, then the positions are refined using an iterative optimization. The layers are traced using an active contour model or snake, which can be constrained to conserve both echogram features and smooth layers. With this technique it is possible to trace internal layers over distances of several hundred kilometers. The method was tested between two Greenland deep ice cores where the age–depth relation is known.