The edge of image is manifested as discontinuity in image, what edge detection means is to doled (in the image ) those discontinuous points or sharp variation points.
图像的边缘表现为图像上的不连续性，边缘检测就是检测图像上的不连续点或陡变点。
Based on the variation principle, the composite element method (CEM) is studied for seepage analysis considering discontinuous surfaces and drainage holes.
基于变分原理，研究渗流分析中模拟排水孔和不连续面的复合单元法。
Based on the variation principle, the composite element method (CEM) is studied for seepage analysis considering discontinuous surfaces and drainage holes.
基于变分原理，研究渗流分析中模拟排水孔和不连续面的复合单元法。
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