The below example adds the channel data values of two images together. It divides the resulting value by 1.0, as decided by the value for argument scale. Lastly, it adds a value of 2, as decided by the vlaue of the offset argument.

# Importing Image and ImageChops module from PIL package 
from PIL import Image, ImageChops
  
# creating a image1 object
im1 = Image.open(r"C:\Users\sadow984\Desktop\a2.PNG")
  
# creating a image2 object
im2 = Image.open(r"C:\Users\sadow984\Desktop\x5.PNG")
  
# applying add method
im3 = ImageChops.add(im1, im2, scale = 1.0, offset = 2)
  
im3.show()