1 Dec
2006
1 Dec
'06
1:36 a.m.
arcarlini at iee.org wrote:
The RSX & RT-11 manuals I scanned had various
pages with colour -
for RSX-11M & RSX-11MPLUS it matters because various sections
only apply under certain conditions and colour is used to
indicate that.
I scanned the entire manual in B&W on one scanner
and then passed
the colour pages through a colour scanner: 600dpi @ 24-bit colour.
I know I should be able to get those pages down to a few 100KB
each but currently they're all still 24MB or so.
I have post-processed some of those manuals to split the colours into
layers, convert them to 1bpp and reassemble. This can make a spectacular
difference to file size.
For example, the original colour scan of AA-5286G-TC was 117 MiB. By
splitting the black and red into layers, the size has come down to 7.9 MiB.
I perform the image processing with a netpbm chain, and then assemble
the PDF with a Perl script, using PDF::API2.
--
Paul