Did you know that our oldest Web standard dates back from October 1994? It was the specification of Portable Network Graphics (PNG) w3.org/TR/REC-png-961001

W3C re-convened a PNG working group in 2021 to work on PNG Third Edition and plan a Fourth Edition aimed to standardize new features such as animation extension, or adding support for HDR imagery. w3.org/groups/wg/png/

You can query our Standards base w3.org/standards/stats/ #aboutW3C

A pertinent introduction to the PNG format, and why there are a lot of "smallest PNG" possible.

and the method is impressive and smart: garbage is added to the image and all of it remains black. It is however quite impressive to get an hashquine picture!

Draw vectorial images

and the project: https://github.com/methodofaction/Method-Draw