dedup.py

import os, hashlib

md = dict()
for root, dirs, files in os.walk("/storage/emulated/0/DCIM/Camera"):
    for file in files:
        if file.endswith(".jpg"):
             fpath = os.path.join(root, file)
             cksum = hashlib.md5(open(fpath, 'rb').read()).hexdigest()
             if cksum in md:
                print('Dup: {} of {}'.format(fpath, md[cksum]))
             else:
                md[cksum] = fpath