CAJ | 학술논문

数学形态滤波是根据形态学原理创建的一种新型滤波方法，目前在信号处理的诸多领域得到成功运用。本文从形态滤波的基本原理出发，引入了一种多结构元素组成的滤波器用于大地电磁噪声消除。通过数值模拟展示了多结构元素滤波器的滤波效果，表明多结构元素滤波器在小尺度的范围内也有较好的滤波性能。同时，实测大地电磁信号的重构曲线和其视电阻率曲线显示多结构元素形态滤波对大地电磁噪声中的大尺度干扰噪声，如方波噪声和三角波噪声等，有较好的抑制作用，说明多结构元素形态滤波在大地电磁去噪中有较好的应用价值。
수학형태려파시근거형태학원리창건적일충신형려파방법，목전재신호처리적제다영역득도성공운용。본문종형태려파적기본원리출발，인입료일충다결구원소조성적려파기용우대지전자조성소제。통과수치모의전시료다결구원소려파기적려파효과，표명다결구원소려파기재소척도적범위내야유교호적려파성능。동시，실측대지전자신호적중구곡선화기시전조솔곡선현시다결구원소형태려파대대지전자조성중적대척도간우조성，여방파조성화삼각파조성등，유교호적억제작용，설명다결구원소형태려파재대지전자거조중유교호적응용개치。
Mathematical morphological filtering, which is a new type of filtering method based on morphological principle, has been ap-plied successfully in various signal processing problems. Based on the principles of the morphological filtering, the authors introduced a new filter structure for noise cancellation characterized by the multiple structural elements to improve SNR ( Signal to Noise Ratio) of MT data in this paper. With numerical simulation, the filtering effect of the multiple structural elements mathematical morphology filte-ring is demonstrated,which indicates that the multiple structural elements mathematical morphology filtering has a good performance in supressing the noise at a small scale. The results of curve reconstruction of the real magnetotelluric sounding data and the apparent re-sistance curve show that the generalized morphological filter can suppress the large-scale noise such as square wave and triangular wave. It is shown that the multiple structural elements morphological filtering has a good application value in the noise suppression of magnetotelluric sounding data.