Legacy ImageMagick Discussions Archive

Hello,
I have scanned a children's book with text and colored drawings on the same page.
I have processed the pages with ScanTailor (combined mode), the result is black-white text and the drawings keep their color, it is very good.

But the pages have a big size (5 to 10mb, pages.tif).
Then with GIMP change color RGB to indexed (menu, image, mode, indexed color). This reduces its size to 1 or 2 mb.

my question.
Can I do this with imagemagick? change from RGB to indexed color and thus decrease size.
and can I do it for many pages at once?

Thanks.




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Linux openSUSE Tumbleweed KDE.
ImageMagick 7.0.7.11-2.1 (command line)

and if you want compress with lzw compression.

@fmw42

Yes, it works very well. (But it does not reduce the size as much as gimp. )

¿How can I do it with all the images in a folder (100 files) ?

Thanks.

Use mogrify rather than convert.

Lets say your images are in directory, test1. Create a new directory, test2, to hold the results.

change directories to test1 See http://www.imagemagick.org/Usage/basics/#mogrify

the script does not work.

I used and it worked very well.

thanks for your help.
greetings from Chile

path2/ was just placeholder for your actual path to your new directory