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Resize Image

Colab Version

import matplotlib.pyplot as plt
import numpy as np
from skimage.io import imread
from skimage.transform import resize
url = 'https://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Claude_Monet%2C_Saint-Georges_majeur_au_cr%C3%A9puscule.jpg/800px-Claude_Monet%2C_Saint-Georges_majeur_au_cr%C3%A9puscule.jpg'
im = imread(url)
plt.imshow(im);
im = resize(im,(512,512))
plt.imshow(im);

This Python code snippet demonstrates how to use the matplotlib, numpy, and scikit-image libraries to download an image from a URL, resize it, and display it using matplotlib.pyplot.

Here's a step-by-step explanation of the code:

  1. Import the necessary libraries:

    • import matplotlib.pyplot as plt: This imports the matplotlib library under the alias plt, which is commonly used for creating plots and displaying images.
    • import numpy as np: This imports the numpy library under the alias np, which is used for numerical operations and array manipulations.
    • from skimage.io import imread: This imports the imread function from the skimage.io module, which is part of the scikit-image library and is used to read images.
    • from skimage.transform import resize: This imports the resize function from the skimage.transform module, which is used for resizing images.

  2. Define a URL:

    url = 'https://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Claude_Monet%2C_Saint-Georges_majeur_au_cr%C3%A9puscule.jpg/800px-Claude_Monet%2C_Saint-Georges_majeur_au_cr%C3%A9puscule.jpg'

    This URL points to an image hosted on Wikimedia Commons.

  3. Read and display the original image:

    im = imread(url)
plt.imshow(im)
    • im = imread(url): This line reads the image from the specified URL using the imread function and stores it in the variable im.
    • plt.imshow(im): This line displays the original image using plt.imshow. This is a quick way to visualize the image.

  4. Resize and display the resized image:

    im = resize(im, (512, 512))
plt.imshow(im)
    • im = resize(im, (512, 512)): This line resizes the im image to have dimensions 512x512 pixels using the resize function. The result is stored back in the im variable.
    • plt.imshow(im): This line displays the resized image. The second call to plt.imshow replaces the original image displayed with the resized one, allowing you to visualize the resized image.

In summary, this code fetches an image from a URL, displays the original image, resizes it to 512x512 pixels, and then displays the resized version of the image using matplotlib. This can be useful for various image processing tasks and visualizations.