[opensuse] printing colored pdf in grayscale or black and white
Hello: I have a pdf file with colored graphics but I have only a black and white printer. When printing the file the colored parts are almost invisibly pale. I would like to print the file in grayscale or black and white so that the colored parts would be visible. I have openSUSE 12.2 with KDE 3, and adobe reader 9 and kpdf. I could not find option to print in grayscale or black and white in either one. I remember that windows adobe reader has such option. How could I print the file in black and white in openSUSE? Thanks, Istvan -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 11/08/2014 01:00 PM, Istvan Gabor wrote:
Hello:
I have a pdf file with colored graphics but I have only a black and white printer. When printing the file the colored parts are almost invisibly pale. I would like to print the file in grayscale or black and white so that the colored parts would be visible. I have openSUSE 12.2 with KDE 3, and adobe reader 9 and kpdf. I could not find option to print in grayscale or black and white in either one. I remember that windows adobe reader has such option. How could I print the file in black and white in openSUSE?
Thanks,
Istvan
Are you sure there isn't a grayscale setting in your printer that will do a better job of rendering? I know that Okular has an option to convert to black and white, under configure, but I don't know if it will do a better job than your printer. -- After all is said and done, more is said than done. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
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)
On November 9, 2014 9:05:53 AM PST, "Carlos E. R." <robin.listas@telefonica.net> 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. -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
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
On 2014-11-09 21:37, Istvan Gabor wrote:
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.
Oh. Well, then I'll suggest another method. Import the original pdf in gimp, as a photo. Then adjust the colour curves, or use one of the filters to convert to BW. The quality will be better than print/scan-adjust/print... and maybe easier. -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)
participants (3)
-
Carlos E. R. -
Istvan Gabor -
John Andersen