Image Preparer, v1.1.0

The utility for image preparation.

Improve resizing of images and add logging of image changes.

Change Log

resizing of images:
- make resizing of images optional;
- skip images with an allowed resolution;
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.

Description

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

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 a name pattern of the find tool);
resizing of images larger than the specified size with the Lanczos filter (optionally);
optimization of images (optionally):
- via the pngquant tool;
- via the OptiPNG 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.

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 a name pattern of the find tool; default: *.png);
-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/v1.1.0.

Content: code.

License: MIT.