[IuMaker]

Try https://vectorizer.ai/ it's main purpose is to convert images (rasters) into vectors (SVG). But it has great line detection and color acquisition, give it a go. Bare in mind that this will only work for images, so you will first need to convert the png into an image.

I know that it seems an odd suggestion, but I had to try different vectorization methods for a project of mine and this one was performing very well with low resolution images. Hope it helps.

[2big2fail_47]

Thanks. That sounds like a nice webapp. In my case it's easier to copy the text from the Mac Preview. Since M1 it does OCR quite well. This way I don't have to convert the pdf to png. Still i'd love a fully automated way.