提出了一种基于图像灰度值切线方向的边缘检测方法。首先搜索确定当前点的灰度值切线方向,然后根据此切线方向两侧像素的灰度变化情况生成边缘图像。对于含噪声的图像,引入噪声检测方法,无需平滑预处理,直接就能得到边界图。实验证明该方法是简单有效的边缘检测方法。 An edge detection method based on tangential direction of image gray value is proposed. First search to determine the current point of the tangential direction of the grayscale, and then according to the tangent direction of the pixels on both sides of the grayscale changes to generate edge images. For noise-containing images, the noise detection method is introduced, and the boundary map can be obtained directly without smoothing preprocessing. Experiments show that this method is a simple and effective edge detection method.