[time-nuts] 3586A HQ PDF Manual available -optimization-

Bob Camp lists at rtty.us
Fri Dec 10 17:48:22 UTC 2010


Hi

PDF does have a lot of flaws. There have been a number of issues with it
over the years. 

It is what pretty much everybody has already installed. It works on just
about every platform out there. That includes things like editors. Modern
versions are quite good at "what goes in is what comes out". 

Simply put - it's the default standard.

DjVu is wonderful for file size, but tough to find a version of for odd
platforms. Importing the file into your favorite editor, or exporting the
edited result generally involves multi step translation. It's used so rarely
that even for supported platforms, the first step will be - go get it and
install it. It's got the same sort of security holes that Acrobat has had.
It's not got the update empire to patch them. 

Simply put - it's a work in progress that may never be finished.

The money in all this comes from people paying for editors and the like.
That's a critical mass sort of thing. I don't see anybody displacing pdf any
time soon. I'd love to see it happen, but the deck is stacked against it.

For things that have archival value (like manuals) pdf is very much the way
to go. The odds of being able to read a pdf 20 or 30 years from now are
pretty good.  The same is not true of less well known formats. To me that
over-rides any of the better / worse / I can get around it stuff. 

Bob


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of K. Szeker
Sent: Friday, December 10, 2010 11:17 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 3586A HQ PDF Manual available -optimization-

Hi all,
why isn`t please, with respect to all working persones, the "DJVU-Formating
" better as all experiments to reduce some from datavolume? Regularly it
needs only ~10%-20% memory as pdf-files...
Best greetings!
Karesz

2010/12/10 <GandalfG8 at aol.com>

>
> In a message dated 10/12/2010 10:19:08 GMT Standard Time,
> rbarrioss at msn.com
>  writes:
>
> I've  downloaded the reduced-size PDF and, although not very obvious,
there
> is  loss of quality. See the attached comparison and see how sharpness  is
> reduced on the optimized capture at the right side. My goal was to  create
> the highest possible quality manuals, using the big sharp scans  found at
> KO4BB website. I'd prefer to release them as good (and big) as  possible
so
> that anyone who needs it can reduce the size (always at a  cost). The
> optimization can be done at any time but the lost bits are lost  forever,
>
>
>
> -------------
> I've also found that the Adobe optimisation option needs to be used with
> care and subtle, and sometimes not so subtle, loss of quaility seems to be
> inevitable.
> I never use it now on files intended for distribution.
>
> Whilst modern scanners can produce excellent quality in terms of
resolution
>  etc the two big problems I've observed with them, and with the  scanning
> techniques they seem to encourage, are the very large default file  sizes
> they tend to produce and the much reduced contrast, with the  latter
> usually
> being much more of a nuisance.
>
> Both seem to be due to the way in which everything gets treated as colour
> or greyscale and the only way I've found so far found of dealing with this
> on  completed PDFs is to extract all the pages as TIF files and process
>  them
> individually for contrast enhancement etc, and superfluous color depth
> reduction, in something like Photoshop or PaintShopPro.
>
> I've had some good results with this but you sure need one heck of a lot
of
>  patience and spare time, so mostly these days I give thanks for large
hard
>  drives and just try to live with it:-)
>
> regards
>
> Nigel
> GM8PZR
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