论文部分内容阅读
大地电磁去噪方法种类多,且各有其优缺点。本文引入汤井田教授的一种新方法——数学形态滤波法,它是依据形态学原理而创建的一种新型的非线性滤波方法,在信号和图像处理领域中得到广泛的运用。本文通过仿真实验设计一个加噪的正弦曲线,通过经腐蚀运算、膨胀运算、开闭运算、闭开运算和经形态滤波后分析曲线特征,之后对比经组合广义形态滤波在同一结构元素不同长度、同一长度不同结构元素滤波效果,最后将组合广义形态滤波引进到实测的音频大地电磁数据中,对比其滤波前和滤波后的视电阻率曲线,结果表明形态滤波能有效抑制音频大地电磁法中大尺度干扰,取得了良好的应用效果。
There are many kinds of methods for removing electromagnetic noise from the earth, and each has its advantages and disadvantages. This paper introduces Professor Tang Jingtian a new method - the mathematical morphology filtering method, which is based on morphological principles to create a new type of nonlinear filtering method, in the field of signal and image processing has been widely used. In this paper, we design a sinusoid with noise by simulating experiments, analyze the curve features through the erosion operation, expansion operation, opening and closing operation, closed-open operation and morphological filtering. After that, The same length of different structural elements of the filtering effect, and finally the combination of generalized morphological filtering is introduced into the measured audio and magnetic data of the earth, compared with its pre-filter and post-filter apparent resistivity curve results show that morphological filtering can effectively inhibit the large electromagnetic audio method Scale interference, and achieved good results.