How can I convert a PNG to a PDF in high quality so it's not blurry or fuzzy?

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http://unix.stackexchange.com – There are a lot of questions out there about how to convert a PDF file to a PNG image, but I'm looking to take a nice sharp PNG file and just basically wrap it or embed it in a PDF file without having it look blurry or fuzzy. I realize with imagemagic installed I can do a simple conversion like: convert sample.png sample.pdf I've also tried a lot of the switches to set the depth, and also the quality setting: convert -quality 100 sample.png sample.pdf However the PDF still comes out looking blurry / fuzzy. Here's a sample image: As a png it's crisp and clean. When I convert it to a (HowTos)