提出一种在噪声条件下将中值滤波与Sobel、Canny算子相结合进行图像边缘检测的方法。首先，采用中值滤波对图像进

行平滑处理，再利用Sobel、Canny算子检测图像边缘。仿真实验表明。该方法对图像边缘检测精度较高，抗噪声性能强，可

提高图像边缘检测效果。-This article proposed an image edge detection method based on the median value filter，Sobel and

Canny Operator under the noise condition．First，use the median value filter to smooth the image，and

then use Sobel and Ganny Operator to detect the image edge．The simulation experiment demonstrates that

this method will increase the precision of the image edge detection，enhance the anti—nose performance，

thus improving the effect of image edge detection．