Oneliner: text to image using imagemagick

$ convert -size 200x30 xc:transparent -font /usr/share/fonts/dejavu/DejaVuSansMono.ttf -fill black -pointsize 12 -draw "text 5,15 'this is just a test'" test.png

The result:

With this oneliner it’s very easy to create images of e-mail addresses for anti-spam purposes (pretty old-fashioned though).