If len(i1.getbands()) == 1

from PIL import Image

i1 = Image.open('./image_1.png')

for i in range(18):
	i2 = Image.open('./image_%s.png'% i)
	pairs = zip(i1.getdata(), i2.getdata())
	if len(i1.getbands()) == 1:
		# for gray-scale jpegs
		dif = sum(abs(p1-p2) for p1,p2 in pairs)
	else:
		dif = sum(abs(c1-c2) for p1,p2 in pairs for c1,c2 in zip(p1,p2))
	ncomponents = i1.size[0] * i1.size[1] * 3
	print ("Difference (percentage):", (dif / 255.0 * 100) / ncomponents)

Source: stackoverflow.com

Similar codes

1 vote219 views1 answer
Ls.ProgrammingError: permission denied for table django_migrations
Python Django
3 votes173 views1 answer
Tf.squeeze()
Python
18 votes177 views4 answers
Reset index python
Python
4 votes188 views1 answer
String pick the first 2 characters python
Python
1 vote206 views1 answer
How to add to hashmap python
Python
1 vote203 views1 answer
For some valid urls also i'm getting 403 in requests.get() python
Python
0 vote181 views1 answer
What is {:02d}:{:02d} in python
Python
0 vote200 views1 answer
Inline for loop
Python
0 vote187 views1 answer
Top gun: maverick
Python
96 votes178 views2 answers
Random number pythn
Python