Learning Robotics using Python - Second Edition

Capturing from the web camera

The following code will capture an image using the webcam with the device name /dev/video0 or /dev/video1.

We need to import the numpy and cv2 modules for capturing an image from a camera:

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

The following function will create a VideoCapture object. The VideoCapture class is used to capture videos from video files or cameras. The initialization argument of the VideoCapture class is the index of a camera or the name of a video file. The device index is just a number that is used to specify the camera. The first camera index is 0, and has the device name /dev/video0-that's why we will put 0 in the following code:

cap = cv2.VideoCapture(0) 

The following section of ...