Three-Dimensional Reconstruction of Fracture Surface of Duplex Stainless Steel Using Stereo Matching.
Three-Dimensional Reconstruction of Fracture Surface of Duplex Stainless Steel Using Stereo Matching.
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利用立体匹配对双相不锈钢断裂表面进行三维重建。
DOI：
10.2472/jsms.51.188
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Y. Kitagawa
中科院分区：
文献类型：
--
作者：
T. Kuroda;K. Ikeuchi;Y. Kitagawa
提出了从三维扫描电镜断口形貌中重建三维形貌的算法。这是一种基于区域的多步立体匹配算法，其目的是为了达到较高的精度，即在第一步中使用较大的窗口面积和搜索面积来搜索立体摄影中对应的点，而不会出现不匹配的情况。下一步，在第一个对应点周围，将寡妇区和搜索区域的大小设置为小于第一步的大小，然后确定第二个对应点。此过程重复到第四步。利用该算法重建了铁素体-奥氏体双相不锈钢断口的dem（数字高程模型）。重建的dem呈现出倾斜的表面，并将重建的dem与真实表面的横截面形貌进行了直接比较。重建的DEM准确地揭示了裂缝表面的凹陷形态和细节特征。
The algorism of the reconstruction of three-dimensional topography from stereoscopic SEM fractographs has been developed. This is an area-based multi-step stereo matching algorithm in order to achieve high accuracy, that is, the corresponding points in stereo photography were searched using a large window area and search area without occurrence of mismatching for the first step. For the next step, the sizes of widow area and search area were set smaller than those of the first step around the first corresponding point and then the second corresponding point is determined. This procedure is repeated up to fourth step.DEMs (Digital Elevation Model) of the fracture surfaces of ferritic-austenitic duplex stainless steels were reconstructed using the developed algorithm. The DEMs showed slanted surfaces, and direct comparison of the cross sectional topography between the reconstructed DEMs and the real surface was performed. The reconstructed DEM revealed exactly the shape of the dimple patterns and detailed features on the fracture surface.