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地震层析成像是一种调查和认识地下地质结构的有效方法,被广泛应用于工程与地质灾害和地球物理勘探等领域。它包括模型的参数化、正演计算、反演及图像重建、反演结果的评价四部分,其中反演及图像重建是地震层析技术的关键部分。因此,对图像重建算法的研究就尤为重要。在建立数值模型的基础上,通过对ART和SIRT数字化图像重建效果的分析与比较,得出SIRT方法重建图像效果最好。
Seismic tomography is an effective method to investigate and recognize underground geological structures and is widely used in engineering and geological disasters and geophysical exploration. It includes four parts: parameterization, forward calculation, inversion and image reconstruction of model, and evaluation of inversion results. Inversion and image reconstruction are the key parts of seismic tomography. Therefore, the research of image reconstruction algorithm is particularly important. Based on the numerical model, through the analysis and comparison of the reconstruction results of ART and SIRT digital images, it is concluded that the SIRT method has the best reconstruction effect.