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一种适用于图像测量的角点检测算法

Keywords: 角点检测,边缘拟合,图像测量

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Abstract:

根据角点一定是边缘点且是2条边缘或多条边缘交点的几何特征,提出了一种基于亚像素边缘拟合的角点提取算法.首先,获得形成角点的边缘所处的图像区域,在该区域中利用亚像素边缘检测算法求得边缘的方程,然后利用相邻2条直线方程分别求交点,最终取均值求出角点的亚像素坐标.通过与Bouguet算法比较,发现在视觉比较、投影误差相近的情况下,本文角点检测算法获得的尺寸测量值的平均绝对误差要小于Bouguet算法,证明本算法更适用于高精度的图像测量。

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