#sobel edge detection
import cv2
import numpy as np

image_path = "corners.jpg"
image = cv2.imread(image_path, cv2.IMREAD_GRAYSCALE)


SobelX = np.array([[-1, 0, 1], 
                   [-2, 0, 2], 
                   [-1, 0, 1]])

SobelY = np.array([[-1, -2, -1], 
                   [ 0,  0,  0], 
                   [ 1,  2,  1]])

gradient_x = cv2.filter2D(image, -1, SobelX)
gradient_y = cv2.filter2D(image, -1, SobelY)

gradient_x = np.float32(gradient_x)
gradient_y = np.float32(gradient_y)

edges = cv2.magnitude(gradient_x, gradient_y)

cv2.imshow("Original Image", image)
cv2.imshow("Sobel Edge Detection", edges.astype(np.uint8))
cv2.waitKey(0)
cv2.destroyAllWindows()