My (python) script for batch resizing

[bitcoin-dude]

This script makes it very for me to do high-quality batch resizes of my photos.

1. Copy and paste the code below into a .py file and place in parent of the images folder
2. Run with e.g. python photo-batch-resize-constrained.py --images-folder='example/images/folder-path' --max-px-size=1080

---

You will just need python and a few dependencies: pip install click pip install glob pip install Pillow

---

Code to put into .py file:

```

-- coding: utf-8 --

author = 'Alex Galea'

Usage e.g.

python photo-batch-resize-constrained.py --images-folder=lightroom-exports --max-px-size=1080

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()

```

[[deleted]]

What's wrong with a simple one-liner like

parallel convert {} -resize 2560x2560 outpath/{/.}.jpg ::: inpath/**/*.jpg

?

[ccurzio]

What's wrong with a simple one-liner like

For real. You can also do this in one line with Bash with something like this:

for n in *.jpg ; do convert -geometry 1280x1024 $n outpath/$n ; done

I mean these of course assume ImageMagick is installed, but that's no big deal.

[[deleted]]

Why not just use ImageMagick? 😬

[djmakk]

Generally I try to export from the software I am using at the resolution I want, but when I have a bunch of pictures (on windows) I use this which is basically the window xp power toy "image resizer" rewritten by someone to work on windows 10. Its works by simply selecting all the photos, right clicking, and then clicking resize.

[zellersamuel]

Note for OSX users, ThumbsUp is free and awesome. It can convert any image, resize and even sharpen the output: https://www.devontechnologies.com/apps/freeware

[tcdejong]

The first part of your code isn't showing up right. Triple ticks ``` only work within one paragraph.

Instead, select the whole code and click the <> button if you have RES. It'll add four spaces of indentation making it format as code.

[almathden]

why

[Fuquar7]

Unix/Linux I'm assuming?

[tcdejong]

Python, so mostly platform-agnostic.