曲率值 meaning in English

zero of curvature

Tests relating to pavements . measurement of a rolling load deflection . part 2 : determination of deflection and curvature values using modified behkelman beam
路面试验.滚动加载挠度测量.第2部分:用改进的贝克曼量仪测定挠度和曲率值
Because the data mutate on the position that is the edge , the normal curvature on some orientation changes from positive to negative . so it is thought whether some point is judged the edge - point by this character
由于边缘是图像上像素发生突变的位置，所以在图像曲面上某一方向的法曲率值会出现由正到负的变化，故此应用这个性质来判断曲面上某点是否为边缘点。