Learning Robotics using Python - Second Edition

Reading and displaying an image using the Python-OpenCV interface

The first example will load an image in grayscale and display it on the screen.

In the following section of code, we will import the numpy module for handling the image array. The cv2 module is the OpenCV wrapper for Python, which we can use to access OpenCV Python APIs. NumPy is an extension to the Python programming language, adding support for large multidimensional arrays and matrices, along with a large library of high-level mathematical functions to operate on these arrays (see https://pypi.python.org/pypi/numpy for more information):

#!/usr/bin/env python 
import numpy as np 
import cv2 

The following function will read the robot.jpg image and load this image in grayscale. ...