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Jan Heinen

29 Dec 2011 29 Dec '11

11:16 a.m.

Hello, lots of my images are huge 200x250mm. I reduce their size with: \externalfigure[cow][width=20mm, heigth=25mm] After generating the PDF, the pdf is very huge. 1. Can't Context put the reduced image into the PDF? 2. How can I generate one PDF version for printing (300dpi) and one for the screen (72dpi)? I am using Context mk-IV. Regards Jannis

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luigi scarso

29 Dec 29 Dec

12:45 p.m.

Hello,

lots of my images are huge 200x250mm. I reduce their size with: \externalfigure[cow][width=20mm, heigth=25mm]

After generating the PDF, the pdf is very huge.

1. Can't Context put the reduced image into the PDF? 2. How can I generate one PDF version for printing (300dpi) and one for the screen (72dpi)?

I am using Context mk-IV. no, you need something like ghostscript. In this case (if you have not problems of space and time) it's better to transform the pdf in ps with

On Thu, Dec 29, 2011 at 12:16 PM, Jan Heinen wrote: pdftops yourfile.pdf and then apply ghostscript to the final ps (see the documentation about ghostscript) -- luigi

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Hans Hagen

1:19 p.m.

On 29-12-2011 13:45, luigi scarso wrote:

...
Hello,

lots of my images are huge 200x250mm. I reduce their size with: \externalfigure[cow][width=20mm, heigth=25mm]

After generating the PDF, the pdf is very huge.

1. Can't Context put the reduced image into the PDF? 2. How can I generate one PDF version for printing (300dpi) and one for the screen (72dpi)?

I am using Context mk-IV. no, you need something like ghostscript. In this case (if you have not problems of space and time) it's better to transform the pdf in ps with

On Thu, Dec 29, 2011 at 12:16 PM, Jan Heinen wrote: pdftops yourfile.pdf and then apply ghostscript to the final ps (see the documentation about ghostscript)

ghostscript can do that directly with the pdf (no need to go through ps) (also see: http://article.gmane.org/gmane.comp.tex.context/71919/match=lowres) ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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luigi scarso

1:32 p.m.

On 29-12-2011 13:45, luigi scarso wrote:

...
On Thu, Dec 29, 2011 at 12:16 PM, Jan Heinen wrote:

...
Hello,

lots of my images are huge 200x250mm. I reduce their size with: \externalfigure[cow][width=20mm, heigth=25mm]

After generating the PDF, the pdf is very huge.

1. Can't Context put the reduced image into the PDF? 2. How can I generate one PDF version for printing (300dpi) and one for the screen (72dpi)?

I am using Context mk-IV.

no, you need something like ghostscript. In this case (if you have not problems of space and time) it's better to transform the pdf in ps with pdftops yourfile.pdf and then apply ghostscript to the final ps (see the documentation about ghostscript)

ghostscript can do that directly with the pdf (no need to go through ps)

(also see: http://article.gmane.org/gmane.comp.tex.context/71919/match=lowres) yes, but latest ghostscript (ver. 9) sometimes fail when used

On Thu, Dec 29, 2011 at 2:19 PM, Hans Hagen wrote: directly with pdf. pdf -> pdftops ->ps ->ghostscript ->pdf seems to be more robust and gives better results (although space and time consuming). -- luigi

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Jan Heinen

4:34 p.m.

/ pdf -> pdftops ->ps ->ghostscript ->pdf />/ seems to be more robust and gives better results />/ -- />/ luigi / I will give it a try: Can you tell me the commands with all the parameters I need ?

I have tried the following: #!/bin/sh suffix="_opt.pdf" pdftops -paper match -level3 $1.pdf tmp.ps gs -sDEVICE=pdfwrite -dPDFSETTINGS=/ebook -dColorConversionStrategy=/LeaveColorUnchanged -dBATCH -dNOPAUSE -sOutputFile=$1.pdf$suffix tmp.ps rm tmp.ps But in some cases the PDF-files got bigger instead of smaller. Regards Jannis

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luigi scarso

4:57 p.m.

On Thu, Dec 29, 2011 at 5:34 PM, Jan Heinen wrote:

...
pdf -> pdftops ->ps ->ghostscript ->pdf seems to be more robust and gives better results -- luigi

I will give it a try: Can you tell me the commands with all the parameters I need ?

I have tried the following:

#!/bin/sh suffix="_opt.pdf" pdftops -paper match -level3 $1.pdf tmp.ps gs -sDEVICE=pdfwrite -dPDFSETTINGS=/ebook -dColorConversionStrategy=/LeaveColorUnchanged -dBATCH -dNOPAUSE -sOutputFile=$1.pdf$suffix tmp.ps rm tmp.ps

But in some cases the PDF-files got bigger instead of smaller. Yes this also my experience. I suppose that gs acts only on images, not streams compression You can try qpdf http://qpdf.sourceforge.net see 3.4. Advanced Transformation Options http://qpdf.sourceforge.net/files/qpdf-manual.html#ref.advanced-transformati...

-- luigi

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Jan Heinen

6:44 p.m.

I found another way to compress PDFs: The ConText-command \pdfcompresslevel=9 qpdf and ghostwriter also helped. Thanx Jannis

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Hans Hagen

6:47 p.m.

On 29-12-2011 19:44, Jan Heinen wrote:

I found another way to compress PDFs: The ConText-command

\pdfcompresslevel=9

qpdf and ghostwriter also helped.

use \maximumpdfcompression instead if the low level \pdf* command ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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Hans Hagen
Jan Heinen
luigi scarso