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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What function is used to capture video from a webcam in OpenCV?
💡 Hint: Think about functions that start capturing video.
Question 2
Easy
How do you display the video frames captured from the webcam?
💡 Hint: This function creates a window.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the default index number for the primary camera in OpenCV?
- 1
- 0
- 2
💡 Hint: It is often the first camera recognized by the system.
Question 2
True or False: cv2.VideoCapture(1) is used to access the second webcam device.
- True
- False
💡 Hint: Consider how camera indices are assigned.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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?
💡 Hint: You'll need to integrate the face detection code from section 21.5.
Question 2
How would you improve the frame rate of the webcam feed? Discuss techniques and implement changes to reduce processing load.
💡 Hint: Consider how changing frame size affects processing time.
Challenge and get performance evaluation