*This project is an assignment for an image processing course • The purpose of this project is to eliminate cosmic rays from the image, which would interfere with celestial observations. Therefore, while eliminating these rays, the shape of the celestial body should not be affected. • The method is to use cv2 of Python to convert the original image into a negative film, then use Laplacian edge detection to find the edge line, and finally use the convolution algorithm to smooth the edge line that matches the feature.