[magick-users] Image quality after resampling is not good - am I using the wrong options?

[omicronpersei8 at imagemagick.org]

> The source images are in most cases PDF and often 300ppi with color

Try the following

  convert -density 400 too-big-scan.pdf -resize 50% just-right-size.gif

Throw in a -monochrome or a +dither -monochrome to create black/white images.