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3 cards from this section. Quick, good the night before a test.
What function is used to capture video from a webcam in OpenCV?
Think about functions that start capturing video.
How do you display the video frames captured from the webcam?
This function creates a window.
What is the default index number for the primary camera in OpenCV?
It is often the first camera recognized by the system.
True or False: cv2.VideoCapture(1) is used to access the second webcam device.
Consider how camera indices are assigned.
Using the webcam video captured, write code to detect faces in real-time and draw rectangles around them. What modifications will you make to integrate face detection into the webcam feed?
You'll need to integrate the face detection code from section 21.5.
How would you improve the frame rate of the webcam feed? Discuss techniques and implement changes to reduce processing load.
Consider how changing frame size affects processing time.
6 more questions in this section. Enroll free to practise them all.
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