: Making a PNG to PDF with very high quality I have seen that several authors of scientific papers include in their work, black and white graphics (university logos mainly) that appear to have

@Lengel450

PDF files are able to store vector drawings as original vectors. If you have a pdf like a flyer where that logo is used you can try opening it in inkscape to see if you can use the logo and delete the other stuff.

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@Sarah814

Both of your images are printable without fixing if you do not need them higher than 5 cm. If you need them as 20 cm high, they can be enlargened wthout losing the sharpness by OnOne Perfect Resize. That will unfortunately reveal some bad edges, but they were easy to fix.

This space only allows me to show a couple of snippets as screenshots about the enlargening results:





Vectorizig is not a must. It's another quessing process that easily give unwanted results.

The grey edges that you mentioned are a part of the ITCelaya logo. Unfortunately they are so thin that your tracing software struggles. Adobe Illustrator is not more clever. A proper CAD drawing vectorizer is surely better because it assumes all lines and curves to be done with drawing tools that produce solid edges without sharp spikes in or out. Oly corners are assumed to be sharp.

ADDENDUM: If you have a right to use these logos and their owners even keep it preferable, they surely send high resolution versions to you.

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@Fox8063795

See whether you can get a vector version of the logo. From the way it looks, it has been created with a vector based software (most likely Adobe Illustrator).

If that is not possible, vectorize it yourself, in Illustrator, or with another suitable tool.

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@Mendez620

There are several websites such as png2pdf.com that offer to convert between images, pdfs, and many other file formats.

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