How to determine all the possible 3 layer combinations out of many files

Question

I have a list of 21 grayscale images. I want to determine and save all the possible 3 layer combinations out of these 21 images. Can anyone a suggest a way in python?

Take a look at `itertools.permutations()`. – BoarGules Feb 24 '21 at 10:00 — BoarGules, Feb 24 '21 at 10:00

tino · Accepted Answer · 2021-02-24T10:29:14.807

0

If you have 21 grayscale images, you could read them all and you would get 21 indices from 0 20.

The code to choose the indices combinations could look like:

import itertools

listOfIndices = list(range(20))
combinations = list(set(list(itertools.combinations(listOfIndices,3))))

This works for any combination without repetitions. If you are ok with the repetitions, the last line becomes:

combinations = list(itertools.combinations(listOfIndices,3))

where each of the element is a 3-index tuple.

edited Feb 24 '21 at 10:29

answered Feb 24 '21 at 10:04

tino

160
6

1

I think it's overkill to import `numpy` just to use the `arange()` function, considering we're using integer and therefore the build-tin `range()` function is equivalent. – Marcello Romani Feb 24 '21 at 10:21
I agree. i will modify the answer! – tino Feb 24 '21 at 10:28

How to determine all the possible 3 layer combinations out of many files

1 Answers1