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The Computer Vision Workshop

You're reading from  The Computer Vision Workshop

Product type Book
Published in Jul 2020
Publisher Packt
ISBN-13 9781800201774
Pages 568 pages
Edition 1st Edition
Languages
Authors (3):
Hafsa Asad Hafsa Asad
Profile icon Hafsa Asad
Vishwesh Ravi Shrimali Vishwesh Ravi Shrimali
Profile icon Vishwesh Ravi Shrimali
Nikhil Singh Nikhil Singh
Profile icon Nikhil Singh
View More author details
Toc

1. Basics of Image Processing

Activity 1.01: Mirror Effect with a Twist

Solution:

  1. Let's start by importing the necessary libraries:
    # Load modules
    import cv2
    import numpy as np
    import matplotlib.pyplot as plt
  2. Next, let's specify the magic command for displaying images in a notebook:
    %matplotlib inline
  3. Now, we can load the image and display it using Matplotlib.

    Note

    Before proceeding, ensure that you can change the path to the images (highlighted) based on where the image is saved in your system.

    The code is as follows:

    # Load image
    img = cv2.imread("../data/lion.jpg")
    plt.imshow(img[:,:,::-1])
    plt.show()

    The output is as follows:

    Figure 1.42: Image that we are going to use in this activity

  4. Next, let's display the image's shape:
    # Get image shape
    img.shape

    The output is (407, 640, 3).

  5. Convert the image into HSV:
    # Convert image to HSV
    imgHSV = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
    plt.imshow(imgHSV[:,:,::-1])
    plt.show()

    The output is as follows...

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