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Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
book

Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

by Steven Lawrence Fernandes, Tim Cox
April 2018
Beginner content levelBeginner
552 pages
13h 58m
English
Packt Publishing
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

How to do it...

  1. Import the Computer Vision package - cv2:
import cv2 
# Import Numerical Python package - numpy as np 
import numpy as np 
  1. Read the image using the built-in imread function:
image = cv2.imread('image_5.jpg') 
  1. Display the original image using the built-in imshow function:
cv2.imshow("Original", image) 
  1. Wait until any key is pressed:
cv2.waitKey(0) 
  1. Execute the Canny edge detection system:
# cv2.Canny is the built-in function used to detect edges 
# cv2.Canny(image, threshold_1, threshold_2) 
canny = cv2.Canny(image, 50, 200) 
  1. Display the edge detected output image using the built-in imshow function:
cv2.imshow("Canny Edge Detection", canny) 
  1. Wait until any key is pressed:
cv2.waitKey(0)
  1. Execute the contour detection ...
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Publisher Resources

ISBN: 9781788629874Supplemental Content