Documentation

[Paul Williams]

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