On the basis of thread image acquisition, the edge of axial-section contour threads was obtained through using the edge detection algorithm.

在获取螺纹图像的基础上，通过边缘检测算法获取螺纹轴剖面外轮廓的边缘。

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The system used image manipulation method to measure geometrical parameters, including binary image production, edge detection, contour hunting and the thread geometrical parameter calculation.

探讨了利用数字图像处理技术进行锥螺纹几何参数测量的方法，并给出了锥螺纹部分的尺寸测量结果。

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Among them algorithm partly includes to be drawn laser thread module, calculation contour module and takes the center color thread module;

其中算法部分包括提取激光线模块、计算轮廓线模块、取中心颜色线模块；

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