岩石电镜扫描图像的分形特征研究

Fractal Analysis of SEM Image for Rocks

基于分形和景观生态学的相关理论,开发了岩石电镜扫描图像的分形维数和间隙度指数分析程序.通过对某地下洞库的两种不同岩性的岩石所得到的电镜扫描图片进行分形维数和间隙度指数计算,讨论图像放大倍数和阈值大小对其二者计算结果的影响和规律.研究结果表明:放大倍数和阈值对于电镜扫描图像分形特征参数的计算具有重要的影响,分形维数和间隙度指数可以定量地描述电镜扫描图像的特征,对于揭示岩石的力学机理有着重要的意义.

Based on the theories of fractal and landscape ecology, this paper develops a program for estimating fractal dimension and lacunarity index of the scanning electron microscopy （SEM） image. According to the calculation of fractal dimension and lacunarity index of two kinds of rocks from an underground cavern, the influence of image magnification and threshold value are discussed. The result show that the threshold and magnification of SEM image have an impact on the calculation of fractal parameters. Fractal dimension and lacunarity index can quantitatively describe the characteristics of SEM image which has great significance to reveal the mechanism of rock mechanics.