This is CSS dithering with "SVG backend" doing the heavy lifting by utilizing the feComposite filter

https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/E...

If we could get jbig2 native support in browsers we could do monochrome black and white images at ridiculously small file sizes.

A page of sheet music can be as small as 8kb. I'm using a wasm decoder right now, but I could forsee using css filters after the fact to make it look less sharp and aliased

I’ve messed with a similar idea here: https://untested.sonnet.io/notes/just-some-innocent-gradient...

(The linked web app doesn’t work on mobile in portrait mode, sorry!)

The biggest issue with this trick is that different engines calculate the filters differently, thus turning an okay-ish image into something that looks like a glitch.

Is this actually dithering?

I have dabbled with some dithering algorithms and while this is way faster than my naive js implementations, this looks pretty bad

Is this what they use at schools before they hand it over to the printer? /j

It feels and looks like threshold-quantized Perlin rather than actual proper dithering. Cool stuff that said!

I have to admit I don't think it's visually very appealing like that. It looks more like some sort of error/ glitch. Maybe my old Firefox does it weirdly?

The image quality is so bad, I don't get it?