Image rotation is a common image processing task that involves rotating an image by a certain angle around its center. In Python, the imageio library provides a simple and convenient way to read, write, and manipulate images. In this blog post, we will explore how to rotate an image using imageio in Python.

Installing ImageIO

To begin, you need to install imageio library. You can install it using pip by running the following command:

pip install imageio

Rotating an Image

Once you have installed imageio, you can start rotating images. Let’s go through a simple example to rotate an image by 90 degrees clockwise.

import imageio
import numpy as np

# Load the image
image = imageio.imread('path/to/image.jpg')

# Rotate the image by 90 degrees clockwise
rotated_image = np.rot90(image, k=1)

# Save the rotated image
imageio.imsave('path/to/rotated_image.jpg', rotated_image)

In the code above, we first load the image using imageio.imread() function. Next, we use np.rot90() function from NumPy library to rotate the image by 90 degrees clockwise. Finally, we save the rotated image using imageio.imsave() function.

You can experiment with different rotation angles by changing the k parameter in the np.rot90() function. For example, if you want to rotate the image by 180 degrees, set k=2.

Conclusion

Image rotation is a useful technique in image processing that allows you to manipulate the orientation of an image. With imageio library in Python, you can easily rotate images by any desired angle. Whether you want to correct the alignment of an image or apply artistic effects, image rotation can be a powerful tool. Give it a try and see how it can enhance your image processing workflows.