picamera2 library basics in Raspberry Pi - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Picamera2 class from the picamera2 library.

Raspberry Pi

from picamera2 import [1]

Drag options to blanks, or click blank then click option'

APicamera2

BCamera

CCamera2

DPiCamera

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'PiCamera' which is from the older picamera library.

Using 'Camera' or 'Camera2' which are not valid class names.

The Picamera2 class is the main class to control the camera in the picamera2 library.

2fill in blank

medium

Complete the code to create a Picamera2 object and start the camera preview.

Raspberry Pi

picam2 = Picamera2()
picam2.[1]()

Drag options to blanks, or click blank then click option'

Apreview

Bstart

Cstart_preview

Dopen

Attempts:

3 left

💡 Hint

Common Mistakes

Using start_preview() which is not a method in picamera2.

Using preview() which does not exist.

The start() method initializes and starts the camera capture.

3fill in blank

hard

Fix the error in the code to capture an image and save it to a file.

Raspberry Pi

picam2 = Picamera2()
picam2.start()
image = picam2.[1]()
image.save('test.jpg')

Drag options to blanks, or click blank then click option'

Acapture_image

Bget_image

Ctake_picture

Dcapture

Attempts:

3 left

💡 Hint

Common Mistakes

Using capture_image() which does not exist.

Using get_image() which is not the correct method.

The correct method to capture an image is capture(). It returns an image object that can be saved.

4fill in blank

hard

Fill both blanks to create a preview window and wait for 5 seconds before stopping the camera.

Raspberry Pi

import time
picam2 = Picamera2()
picam2.[1]()
time.[2](5)
picam2.stop()

Drag options to blanks, or click blank then click option'

Astart

Bsleep

Cwait

Dpause

Attempts:

3 left

💡 Hint

Common Mistakes

Using wait() or pause() which are not functions in the time module.

Using stop() before waiting.

Use start() to begin the camera and time.sleep(5) to wait 5 seconds.

5fill in blank

hard

Fill all three blanks to configure the camera for a 640x480 preview and capture an image.

Raspberry Pi

picam2 = Picamera2()
config = picam2.create_preview_configuration({'size': ([1], [2])})
picam2.configure(config)
picam2.start()
image = picam2.[3]()

Drag options to blanks, or click blank then click option'

A640

B480

Ccapture

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping width and height values.

Using start() instead of capture() to get an image.

The preview size is set to 640x480. The method to capture an image is capture().