A scan of a text document saved as pdf was being printed rather poorly. The following processing improved the quality, darkening the text with less fuzziness.
convert -density 300 scan.pdf -brightness-contrast -20x40 -depth 4 -colors 4 darker.pdf
Your donation will support ongoing availability and give you access to the PDF version of this book. Desktop Survival Guides include Data Science, GNU/Linux, and MLHub. Books available on Amazon include Data Mining with Rattle and Essentials of Data Science. Popular open source software includes rattle, wajig, and mlhub. Hosted by Togaware, a pioneer of free and open source software since 1984. Copyright © 1995-2022 Graham.Williams@togaware.com Creative Commons Attribution-ShareAlike 4.0