Stitch multiple images into one using OpenCV

stitch.py

##############################################################################
# Copyright 2019 Douglas De Rizzo Meneghetti

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
##############################################################################

# Usage
#     python stitch.py [DIRECTORY]
#
# Will read all JPG files in DIRECTORY and stitch them into
# one stitched.jpg file. Default directory is .

import cv2
import os
import sys

filepath = '.' if len(sys.argv) == 1 else sys.argv[1]

print('Loading images from {}'.format(filepath))

files = [os.path.join(filepath, i) for i in os.listdir(filepath) if i.endswith('.jpg')]

print(' Found {} jpg files'.format(len(files)))

print('Loading images...')
ims = [cv2.imread(x) for x in files]

s = cv2.Stitcher_create()

print('Stitching...')
(status, stitched) = s.stitch(ims)

if status != 0:
    raise ValueError('Error {}'.format(status))
else:
    outfile = os.path.join(filepath, 'stitched.jpg')
    cv2.imwrite(outfile, stitched)
    print('Done. Output saved to {}'.format(outfile))