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2 ways to rotate an image by an angle in Python

Rotate Image By An Angle In Python

Hey, folks! In this article, we will be unveiling ways to rotate an image by an angle in Python.

By rotating an image we mean that the image is rotated by its centre to a specified degree.

Technique 1: Python Image Library(PIL)

PIL -- Python Image Library is a module that contains in-built functions to manipulate and work with image as an input to the functions.

PIL provides in-built image.rotate(angle) function to rotate an image by an angle in Python.

Syntax:

image.rotate(angle)

In order to load an image or pass an image to the rotate() function, we need to use the below snippet of code:

Image.open(r"URL of the image")

We need to use the below snippet of code to display the image:

image.show()

Example 1:

from PIL import Image 

 
img = Image.open(r"C:\Users\HP\OneDrive\Desktop\Penskull Education.png") 

rotate_img= img.rotate(125)

rotate_img.show() 

In the above snippet of code, we have rotated the input image by an angle of 125 degree.

Input Image:

Input Image
Input Image

Output:

125degree
125 degree – rotation

Example 2:

from PIL import Image 

 
img = Image.open(r"C:\Users\HP\OneDrive\Desktop\Penskull Education -- 01.png") 

rotate_img= img.rotate(45)

rotate_img.show() 

In this example, the image is being rotated by an angle of 45 degree.

Output:

45 degree - rotation
45 degree – rotation

Technique 2: OpenCV to rotate an image by an angle in Python

Python OpenCV is a module that deals with real-time applications related to computer vision. It contains a good number of built-in functions to deal with images as input from the user.

OpenCV works well with another image processing library named ‘imutils‘ to manipulate and work with images.

The imutils.rotate() function is used to rotate an image by an angle in Python

Syntax:

imutils.rotate(image, angle=angle)

Syntax: To read an image as input using OpenCV

cv2.imread(r"image path/URL")

Syntax: To display the image using OpenCV

cv2.imshow("output--msg",image)

Example:

import cv2
import imutils
image = cv2.imread(r"C:\Users\HP\OneDrive\Desktop\Penskull Education.png")

rot = imutils.rotate(image, angle=45)
cv2.imshow("Rotated", rot)
cv2.waitKey(0)

Output:

Rotation Using OpenCV
Rotation Using OpenCV

Conclusion

Thus, in this article, we have discussed various ways by which we can rotate the input image by an angle in Python using different libraries.

I strongly recommend the readers to go through Cropping an Image in Python, to understand more about the functionalities available to manipulate the images in Python.


References