EdgeDetect.py

#!/usr/bin/env python3

import sys
try:
   import numpy as np
   import cv2
except:
    print("Please install opencv-python and numpy via pip")
    sys.exit(0)

if len(sys.argv) == 1:
    print("Usage: {} [PATH TO INPUT IMAGE FILE]".format(sys.argv[0]))
    sys.exit(0)

# Read the image from disk to memory
img = cv2.imread(sys.argv[1], 0)

# Canny Edge detect
edges = cv2.Canny(img,100,200)

cv2.imshow('Edge Detected Image', edges)

# Code to exit when Esc key is pressed.
while True:
   key = cv2.waitKey(3000) # Pause program loop for 3 seconds
   if key == 27:
       cv2.destroyAllWindows()
       break;

sys.exit(0);