Image Processing - Implementing Sobel Filter

Question

I\'ve got a task to implement Sobel filter which is, as you know, an image processing filter for edge detection. But unfortunately, I\'ve got no experience in image processi

Answer 1

Of course, you could use OpenCV for this:

import cv2
import numpy as np

img = cv2.imread(INPUT_IMAGE)
img = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY).astype(float)

edge_x = cv2.Sobel(img,cv2.CV_64F,1,0,ksize=3)
edge_y = cv2.Sobel(img,cv2.CV_64F,0,1,ksize=3)    
edge = np.sqrt(edge_x**2 + edge_y**2)    # image can be normalized to 
                                         # fit into 0..255 color space
cv2.imwrite(OUTPUT_IMAGE, edge)

Input / Output: