Python and OpenCV Quiz

What is the purpose of resizing and rescaling images and video frames in OpenCV?

• To increase computational strain

• To prevent computational strain

• To decrease the quality of the media files

• To add more information to the media files

What method is used to read images in OpenCV?

• cv.read_image

• cv.imread

• cv.load_image

• cv.open_image

What does the cv.waitKey(0) function do in OpenCV?

• Waits for 0 milliseconds for a key to be pressed

• Waits for a specific delay for a key to be pressed

• Waits for an infinite amount of time for a key to be pressed

• Waits for a specific delay for a mouse click

What is the purpose of the cv.resize method in OpenCV?

• To rotate the image

• To resize the image to a particular dimension

• To convert the image to grayscale

• To crop the image

What is the purpose of the cv.VideoCapture method in OpenCV?

• To capture video frames from the internet

• To capture video frames from a file path

• To capture images from the webcam

• To capture video frames from a live stream

What does the negative 215 assertion failed error indicate in OpenCV?

• The image or video frame could not be read

• The image or video frame is too large

• The image or video file does not exist

• The image or video frame is corrupted

What is the purpose of the cv.imshow method in OpenCV?

• To rotate the image

• To convert the image to grayscale

• To display the image as a new window

• To resize the image

What is the purpose of the cv.waitKey(20) function in OpenCV?

• Waits for 20 milliseconds for a key to be pressed

• Waits for a specific delay for a key to be pressed

• Waits for an infinite amount of time for a key to be pressed

• Waits for a specific delay for a mouse click

What is the purpose of the cv.VideoCapture.set method in OpenCV?

• To set the quality of the video

• To set the duration of the video

• To set the resolution of the video

• To set the frame rate of the video

What is the purpose of the cv.destroyAllWindows method in OpenCV?

• To close a specific window

• To minimize all windows

• To maximize all windows

• To destroy all windows