Python PIL | ImageOps.postarize() method

PIL is the Python Imaging Library which provides the python interpreter with image editing capabilities. ImageOps module contains a number of ‘ready-made’ image processing operations. This module is somewhat experimental, and most operators only work on L and RGB images.

ImageOps.posterize() Reduce the number of bits for each color channel.In every change of bit change of colour contraction will be seen

Syntax: PIL.ImageOps.posterize(image)

Parameters:
image – The image used to posterize.
bits – The number of bits to keep for each channel (1-8). Bit 8 is the max bit can be used by the channel.

Returns: An image.

Image Used:

# Importing Image and ImageOps module from PIL package
from PIL import Image, ImageOps

# creating a image1 object
im1 = Image.open(r"C:\Users\System-Pc\Desktop\a.JPG")

# applying posterize method
im2 = ImageOps.posterize(im1, 2)

im2.show()

Output:

bit– Taking bit 4 here to understand the change in colour by changing bits in channel.

# Importing Image and ImageOps module from PIL package
from PIL import Image, ImageOps

# creating a image1 object
im1 = Image.open(r"C:\Users\System-Pc\Desktop\a.JPG")

# applying posterize method
im2 = ImageOps.posterize(im1, 4)

im2.show()

Output: