First image processing program in Computer Vision - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to load an image using OpenCV.

Computer Vision

import cv2

image = cv2.[1]('sample.jpg')

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

Aresize

Bimshow

Cimwrite

Dimread

Attempts:

3 left

💡 Hint

Common Mistakes

Using imshow instead of imread to load image.

The function cv2.imread loads an image from a file into memory.

2fill in blank

medium

Complete the code to display the loaded image in a window.

Computer Vision

cv2.[1]('Display Window', image)
cv2.waitKey(0)
cv2.destroyAllWindows()

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

Aimread

Bimshow

Cimwrite

Dresize

Attempts:

3 left

💡 Hint

Common Mistakes

Using imread instead of imshow to display image.

The function cv2.imshow shows the image in a window with a given title.

3fill in blank

hard

Fix the error in the code to convert the image to grayscale.

Computer Vision

gray_image = cv2.cvtColor(image, [1])

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Acv2.COLOR_BGR2GRAY

Bcv2.COLOR_RGB2BGR

Ccv2.COLOR_BGR2RGB

Dcv2.COLOR_GRAY2BGR

Attempts:

3 left

💡 Hint

Common Mistakes

Using color conversions that do not produce grayscale images.

To convert a color image to grayscale, use cv2.COLOR_BGR2GRAY.

4fill in blank

hard

Fill both blanks to save the grayscale image to a file and then display it.

Computer Vision

cv2.[1]('gray_sample.jpg', gray_image)
cv2.[2]('Gray Image', gray_image)
cv2.waitKey(0)
cv2.destroyAllWindows()

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

Aimwrite

Bimshow

Cimread

Dresize

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up imread and imwrite functions.

cv2.imwrite saves an image to a file, and cv2.imshow displays it.

5fill in blank

hard

Fill all three blanks to resize the image to half its size and display it.

Computer Vision

height, width = image.shape[:2]
new_size = (width [1] 2, height [2] 2)
resized_image = cv2.[3](image, new_size)
cv2.imshow('Resized Image', resized_image)
cv2.waitKey(0)
cv2.destroyAllWindows()

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

A//

B/

Cresize

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using float division causing errors in size.

Using wrong function to resize.

Use integer division // to get new dimensions and cv2.resize to resize the image.