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PDF to jpeg conversion with ghostscript
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| varun8211@gmail.com 2007-09-14, 4:19 am |
| When I use this command :
gs -q -dSAFER -dJPEGQ=$quality -dTextAlphaBits=4 -dGraphicsAlphaBits=4
-r200 -dNOPAUSE -dBATCH -sDEVICE=jpeg $outputSpec -c \"<< /UseCIEColor
true >> setpagedevice \" -f $sourceFile
to convert CMYK PDf to jpeg, it works good but if the PDf is RGB, the
the out put jpeg is not good.
any idea why ?
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| In article <1189749567.213096.61270@57g2000hsv.googlegroups.com>,
varun8211@gmail.com says...
> When I use this command :
> gs -q -dSAFER -dJPEGQ=$quality -dTextAlphaBits=4 -dGraphicsAlphaBits=4
> -r200 -dNOPAUSE -dBATCH -sDEVICE=jpeg $outputSpec -c \"<< /UseCIEColor
> true >> setpagedevice \" -f $sourceFile
>
> to convert CMYK PDf to jpeg, it works good but if the PDf is RGB, the
> the out put jpeg is not good.
>
>
> any idea why ?
You have set /UseCIEColor to true, what are you using for a Color
Rendering Dictionary ?
If you want to use CIE colour correction its vitally important to use a
CRD which gives correct colours for your device.
Its also possible that the DefaultRGB resource supplied with GhostScript
isn't ideal, have you tried changing it ?
Ken
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