On 01/01 10:34, Frank Steinmetzger wrote: > On Mon, Jan 01, 2018 at 09:24:46PM +0100, tu...@posteo.de wrote: > > Hi, > > […] > > For displaying (the illusion of) different shades of gray, one need > > to convert the colored image into a so called "dithered" black and > > white image (newspapers often use this trick). > > Since -- in difference to the newspapers -- the pixels all have the > > same size and can only be switched on or off only a few dithering > > methods can be applied from which I want to choose the best suited > > for a certain image. > > > > The only problem: Which software can do this kind of conversion? > > The obvious answer Gimp has three methods. Open your photo, select Image → > Mode → Indexed. Select 1 bit colour depth and choose between the dithering > methods at the bottom of the dialog. > > -- > Gruß | Greetings | Qapla’ > Please do not share anything from, with or about me on any social network. > > The bad thing about Wikipedia jokes is > - Deleted due to lack of relevance. - >
Hi Frank, thanks for your help! :) Yes, Gimp would be one possibility...but I forgot to mention, that I am looking for a command line tool... I want to do 'mass dithering' and want neither a gui nor a heavy program like The Gimp. I checked pbmplus and found no useful part for that porpuse... Cheers Meino
