[magick-users] black and white png

[RA A. Winzer (Koenig & Dey)]

Hello and thank you,

----- Original Message ----- 
From: "Fred Weinhaus"
> see http://www.imagemagick.org/Usage/quantize/#two_color
>

I've already seen this and much more. My problem still is, that I don't work 
for me.
I always get just a white picture without any text if I use

   convert source.ps -colors 2 -colospace gray -normalize dest.png

I'm also wondering why

   convert -density 200 source.ps -colorspace gray dest.png

gives me a 64bit TrueColor-picture as result.

Quite good works for me

   convert -type grayscale -density 200 -monochrome source.ps dest.png

But there is a fork-effect with the letters. Although I need to print the 
pictures sometimes I can't use this. Maybe someone has a hint for me with 
this last line...

The 2-bit-image isn't a dogma. It's just that I have an archiv filled with 
picture from a scanner which only delivers b/w-pictures, but dithered. That 
looks not bad. I still think that the pictures I print over 
postscript-driver -> samba -> ps-file -> convert -> png should better be in 
8 bit with 256 grayscales. But the size of the pictures is to much.
If I reload these pictures and save them again I can have half the size.