Image Preparer, v1.2.0

The utility for image preparation.

Support optimization of images in JPEG format; add an optimization step via the advpng tool from the AdvanceCOMP project; improve search of images.

Change Log

search of images:
- fix the bug with ignoring files with extensions in uppercase;
- support Perl-compatible regular expressions (PCREs) in a pattern of image filenames;
optimization of images:
- in PNG format:
  - via the advpng tool from the AdvanceCOMP project;
- in JPEG format:
  - via the jpegoptim tool.

Description

This is the utility for image preparation: resizing of images larger than the specified size and optimization of images in PNG and JPEG formats.

This is a simple script that combines several well-known tools and sets a particular mode for their running. The script also collects some statistics about the results of processing.

I use it to prepare images (screenshots and photos) for my blog.

⚠️ Warning! To avoid damaging the images or significantly degrading their quality, the script should not be run repeatedly on files that have already been processed by it.

Features

search of images:
- recursive search (optionally);
- filtering by a pattern of image filenames (uses Perl-compatible regular expressions (PCREs));
resizing of images larger than the specified size with the Lanczos filter (optionally);
optimization of images (optionally):
- in PNG format:
  - via the pngquant tool;
  - via the OptiPNG tool;
  - via the advpng tool from the AdvanceCOMP project;
- in JPEG format:
  - via the jpegoptim tool;
logging of image changes:
- logging of a change of an image resolution on resizing;
- logging of a change of an image size:
  - on the following operations:
    - resizing;
    - optimization;
  - logging of a total change of image sizes:
    - total change after all the optimization steps;
    - total change after both resizing and optimization operations;
    - total change for all images together;
  - logging of a saved image size in percent.

Requirements

ImageMagick >=6.7.7-10, <7.0;
pngquant >=2.9.1, <3.0;
OptiPNG >=0.7.6, <1.0;
AdvanceCOMP >=2.1.0, <3.0;
jpegoptim >=1.4.6, <2.0.

Installation of the Requirements

On Ubuntu:

$ sudo apt update \
  && sudo apt install imagemagick-6.q16 pngquant optipng advancecomp jpegoptim

Usage

$ image_preparer.bash -v | --version
$ image_preparer.bash -h | --help
$ image_preparer.bash [options] [<path>]

Options:

-v, --version — show the version;
-h, --help — show the help;
-n PATTERN, --name PATTERN — a pattern of image filenames (uses Perl-compatible regular expressions (PCREs); default: (?i)\.(png|jpe?g));
-r, --recursive — recursive search of images;
-w WIDTH, --width WIDTH — a maximum width of images (default: 640);
--no-resize — don't resize images;
--no-optimize — don't optimize images.

Arguments:

<path> — base path to images (default: .).

Repository

Link: https://github.com/thewizardplusplus/image-preparer/tree/v1.2.0.

Content: code.

License: MIT.

Screenshots

Optimization of images in PNG format