Skip to content

Instantly share code, notes, and snippets.

@agalea91
Last active October 19, 2019 11:58
Show Gist options
  • Star 1 You must be signed in to star a gist
  • Fork 1 You must be signed in to fork a gist
  • Save agalea91/12149be6d4f64ba61c7b1d222fce3174 to your computer and use it in GitHub Desktop.
Save agalea91/12149be6d4f64ba61c7b1d222fce3174 to your computer and use it in GitHub Desktop.
Resize a folder of images to a set max width / height dimension, keeping proportions constrained
import click
import glob
import os
from PIL import Image
@click.command()
@click.option(
'--max-px-size',
default=2560,
help='The max height / width of image in pixels.'
)
@click.option(
'--images-folder',
default='images',
help='Name of folder containing images.'
)
def main(max_px_size, images_folder):
imgs = []
imgs += sorted(glob.glob(os.path.join(images_folder, '*.jpg')))
imgs += sorted(glob.glob(os.path.join(images_folder, '*.jpeg')))
print('Image files to resize:')
print('\n'.join(imgs))
output_folder = '{}-{}px'.format(images_folder, max_px_size)
if not os.path.exists(output_folder):
os.makedirs(output_folder)
for img_path in imgs:
try:
resize(img_path, max_px_size, output_folder)
except Exception as e:
with open('error.txt', 'w') as f:
f.write(str(e))
def resize(img_path, max_px_size, output_folder):
with Image.open(img_path) as img:
width_0, height_0 = img.size
out_f_name = os.path.split(img_path)[-1]
out_f_path = os.path.join(output_folder, out_f_name)
if max((width_0, height_0)) <= max_px_size:
print('writing {} to disk (no change from original)'.format(out_f_path))
img.save(out_f_path)
return
if width_0 > height_0:
wpercent = max_px_size / float(width_0)
hsize = int(float(height_0) * float(wpercent))
img = img.resize((max_px_size, hsize), Image.ANTIALIAS)
print('writing {} to disk'.format(out_f_path))
img.save(out_f_path)
return
if width_0 < height_0:
hpercent = max_px_size / float(height_0)
wsize = int(float(width_0) * float(hpercent))
img = img.resize((wsize, max_px_size), Image.ANTIALIAS)
print('writing {} to disk'.format(out_f_path))
img.save(out_f_path)
return
if __name__ == '__main__':
main()
@agalea91
Copy link
Author

agalea91 commented May 31, 2018

This script should be placed outside the images folder. By default this folder should be named images. The default max dimension size is 2560px, but it can be specified manually using the CLI e.g.

python photo-batch-resize-constrained.py --max-px-size 4000 --images-folder my_SLR_pictures

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment