Batch Resize Images

Do you have a bunch of images dumped in a hard drive that you want to resize to a smaller size? This script is for you.

Description

A simple python script that uses PIL and joblib to resize images in a directory to a specified fraction.

Crawls the source directory for images and resizes them to a specified fraction of the original size. The resized images are saved in the corresponding directory structure in the destination directory.

Usage

python3 resize_images.py src/ dest/ --debug --quality 85 --percent 40 --min_width 1000 --jobs -1

dest/ will be created if it does not exist

Performance

On an 8 core i7-6700HQ it takes about 15 seconds to resize 224 images of size ~5000x3000 to 40% of their original size.

• This results in a reduction from 1024 MB to 102 MB (10%)

• Or with 75 quality: 1024 MB to 75 MB (7.5%)

Arguments

positional arguments:
  input_dir             Input directory containing images to resize
  output_dir            Output directory to save resized images

optional arguments:
     -h, --help                    show this help message and exit
     -d --debug                    Enable debug mode
     -q QUALITY --quality QUALITY  Quality of resized images (0 - 100)
     -p --percent PERCENT          Percent to resize images (0.0 - 1.0)
     -w --min_width MIN_WIDTH      Minimum width(or height which ever is bigger) of resized images
     -j --jobs JOBS                Number of jobs to run in parallel

Requirements

joblib==1.2.0