Python Pillow - Flip and Rotate Images

Prerequisites: Pillow

Python Pillow or PIL is the Python library that provides image editing and manipulating features. The Image Module in it provides a number of functions to flip and rotate images. image.transpose() is the function used to rotate and flip images with necessary keywords as parameters.

Syntax:

image.transpose(appropriate keyword)

In the examples given below, we will be exploring all possible rotations using an appropriate keyword.

Image used:

Flipping Images

• Anticlockwise: To flip an image in anti-clockwise direction the keyword that needs to be passed is Image.TRANSPOSE.

Syntax:

img.transpose(Image.TRANSPOSE)

Example:

from PIL import Image


img = Image.open('geek.jpg')

# flip anti-clockwise
flip_img = img.transpose(Image.TRANSPOSE)

flip_img.show()

Output :

Clockwise: To flip an image in the clockwise direction the keyword that needs to be passed is Image.TRANSVERSE.

Syntax:

 img.transpose(Image.TRANSVERSE)

Example:

from PIL import Image


img  = Image.open('geek.jpg')

# flip clockwise 
flip_img= img.transpose(Image.TRANSVERSE)

flip_img.show()

Output :

Horizontal Flip: For horizontal flip, pass Image.FLIP_LEFT_RIGHT as the keyword.

Syntax :

 img.transpose(Image.FLIP_LEFT_RIGHT)

Example:

from PIL import Image


img = Image.open('geek.jpg')

# flip horizontal
flip_img = img.transpose(Image.FLIP_LEFT_RIGHT)

flip_img.show()

Output :

Vertical flip: To flip vertically pass image.FLIP_TOP_BOTTOM as keyword

Syntax:

img.transpose(Image.FLIP_TOP_BOTTOM)

Example:

from PIL import Image


img = Image.open('geek.jpg')

# flip vertical
flip_img = img.transpose(Image.FLIP_TOP_BOTTOM)

flip_img.show()

Output :

Rotating Images

Image rotation is done by specific angles and for that again specific keywords need to passed as discussed below:

Rotate by 90 degrees: The keyword used for this is Image.ROTATE_90

Syntax :

img.transpose(Image.ROTATE_90)

Example:

from PIL import Image


img = Image.open('geek.jpg')

# rotate by 90 degrees
rot_img = img.transpose(Image.ROTATE_90)

rot_img.show()

Output :

Rotate by 180 degrees: To rotate by 180 degrees the keyword used is Image.ROTATE_180

Syntax :

 img.transpose(Image.ROTATE_180)

Example:

from PIL import Image


img = Image.open('geek.jpg')

# rotate by 180 degrees
rot_img = img.transpose(Image.ROTATE_180)

rot_img.show()

Output:

Rotate by 270 degrees: To rotate by 270 degrees the keyword used is Image.ROTATE_270

Syntax :

img.transpose(Image.ROTATE_270)

Example:

from PIL import Image


img = Image.open('geek.jpg')

# rotate by 270 degrees
rot_img = img.transpose(Image.ROTATE_270)

rot_img.show()

Output: