Web Image Optimisation with GIMP -

Why image optimization?

To save loading .

My old way

ImageMagick provides a great CLI utility to convert and compress images for any purposes. However, to -crop images, I have to specify the numbers in pixels. One certainly works much more efficiently with a GUI tool.

My new way

GIMP can do anything that Adobe Photoshop can do, even saving images for web. In the linked page to this powerful GIMP plugin tutorial, the link for the GNU/Linux binary file is broken.

Compile from source code (optional)

Unluckily, autogen.sh can’t recognise the Automake 1.15 installed. I tried following all answers in a related question, but they didn’t solve the problem.

Installation on GNU/Linux

To download it for Debian-based distros, you may search for gimp-plugin-registry in your favourite package manager (Aptitude, Synaptic, etc).

My preferred parameters

Max dimension: 1200 px
JPEG for photos
- Quality: 0.8–0.95 (0.6 is OK for huge photos )
- Smoothness: 0.10–0.15
- Progressif
- EXIF data
PNG for computer drawn raster graphics
- Transparent background if possible to discard background noise (with Magical Wand and Intelligent Scissors).
- Use black and white colors for black-and-white pictures .