[Gimp-user] convert tiff image to bitonal

[Owen]

> Imagemagick does the job.
>
> Command I used was this:
>
> convert -colors 2 -density 600x600 -colorspace gray -compress group4
> pg_0015.pdf pg_0015.tif
>
> The tif files generated are bitonal and the djvulibre bitonal
> algorithm cjb2 works fine on them.
>
> Was not able to batch, so I used openoffice spreadsheet to generate a
> script containing 774 lines for the 774 images I had to convert. :-)


You could run a bash script something like this

WARNING - UNTESTED

for i in *.tiff; do echo "converting \"$i\"..."; convert "$i" -colors 2
-density 600x600 -colorspace gray -compress group4 "bitonal-$i"; done




Owen