John Andersen írta:
On November 9, 2014 9:05:53 AM PST, "Carlos E. R." wrote:
On 2014-11-08 22:00, Istvan Gabor wrote:
How could I print the file in black and white in openSUSE?
You change printer settings. As your printer is b/w, it's driver should do automatically this conversion, unless it thinks that it is a colour unit. The problem is, in this case, what colour is converted to what grey level. A better solution was to change er... how to say this in English... the granularity? Filling colours with thin parallel lines inclined this way or the other, or with dots, etc. You had to do this when the graphics were generated, of course, not a print time.
You could alter the graphics with gimp.
-- Cheers / Saludos,
Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)
Way too much trouble Carlos. Editing a PDF to print it in b/w is a big mess.
The simplest way that I have found is to just use the settings in Okular to force black and white mode, adjust the slider for contrast, then print or save as a new PDF.
John, Carlos, thank you. Finally I could convert the pdf to grayscale using gs: gs -sDEVICE=pdfwrite -dNOPAUSE -dQUIET -dBATCH -sColorConversionStrategy=Gray -dProcessColorModel=/DeviceGray -OutputFile=out.pdf in.pd I found this command in a blog on the net. While the converted colors look good on screen, when printed they are still very pale, practically no difference compared to the original print. I guess this indicates that during the original print the same color conversion was made. What I did, was: I scanned the printed document in black and white using a threshold which resulted in the gray lines scanned as black. I printed out this scanned document; the quality is not perfect but acceptable for my purpose. I don't have a machine at hand which has okular. I will try okular when I'll have access such a computer. Thanks again, Istvan -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org