Smart Internet of Things Projects

Accessing camera modules from the OpenCV library

In the previous section, we used a still image as a source for the OpenCV library. We can use a camera as the source of a still image. A camera generates video data, which is a collection of still images. To access camera modules from the OpenCV library, follow these steps:

1. To access a camera from OpenCV, we can use the VideoCapture object. We call read() to read a frame, which is a still of a frame.
2. For a demo, we use the camera USB drive. Just connect this device to the Raspberry Pi board through the USB drive. Then, we write the following scripts with your text editor:

   import numpy as np import cv2 cap = cv2.VideoCapture(0) while True: # Capture frame-by-frame ret, frame = cap.read() # Display the ...