岩石铸体薄片图像的喉道分割算法

The Segmentation Method of Throat of Rock Casting Body Image

为了克服传统岩石铸体图像喉道分割不准确、耗时等问题,提出一种基于拐点检测的喉道分割方法。喉道的定义是连接相邻岩石孔腔的最窄部分,而孔隙区域最窄处两端边界往往向内形成凹陷,所以采用基于拐点检测的喉道分割。首先,对于孔隙边界外轮廓进行凹点的检测,对于内轮廓进行凸点的检测,然后根据孔隙喉道定义通过筛选与匹配算法对拐点进行处理,并利用对角边缘最短距离的方法处理拐点数为奇数的情况,从而形成分割线用以喉道分割。对多组不同情况的铸体图片进行分割实验,实验结果表明,该方法具有良好的喉道分割效果。

In order to avoid inaccuracy and time-consuming produced by traditional segmentation method of throat on rock casting body image,pro-poses a new method for segmentation of throat based on detection of inflection point.The definition of throat is the narrowest part of adja-cent rock pore.The narrowest pass of rock pore is usually depressed,so uses the segmentation method of throat based on detection of inflec-tion point.Firstly,need to detect inflection points of outer contours and inner contours and according to the definition of throat to filter and match inflection points.When the number of points is odd,utilizes the shortest distance of diagonal edge to process it.Lastly,throats would be formed by a pair of inflection points.Experiments of segmentation on different multiple rock images are proceeded.The results indicate that the algorithm has good performance in the segmentation of throat.