一种基于Canny算子的图像边缘检测方法

An Image Edge Detection Method based on Canny Operator

边缘检测即是通过一定算法得到清晰、完整的图像轮廓。用Canny算子提取图像边缘特征应用得十分广泛,其提取图像边缘特征的步骤为:先通过图像预处理对图像信息进行平滑去噪;再用高斯滤波器确定图像梯度的幅值与方向;接下来用非极大值抑制的方法确定边缘点;然后采用双域值法检测并连接目标边缘;最后过滤边缘干扰信息,以去除伪边缘。Canny算子有较好的边缘检测性能,可以有效抑制噪声信号及去除伪边缘。

Edge detection is a clear and complete image contour by a certain algorithm.The edge of the image is extracted by Canny operator.The edge feature of the image is extracted by smoothing the image information by image preprocessing.The Gaussian filter is used to determine the amplitude of the image gradient.And then use the double-domain method to detect and connect the target edge.Finally,the edge interference information is filtered to remove the pseudo edge.Canny operator has better edge detection performance,can effectively suppress the noise signal and remove the pseudo edge.