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

Don Latham djl at montana.com
Fri Dec 10 18:19:49 UTC 2010


DJVU is a wavelet decomposition scheme so as zoom in is done, the
resolution stays the same. Quite different from adobe. Unfortunately for
Lizardtech, DJVU never quite caught on.
Don


paul swed
> DJVU does work well but is quite uncommon.
> Every PC shipped these days seems to have adobe on it.
>
> On Fri, Dec 10, 2010 at 11:16 AM, K. Szeker <szeker.k at gmail.com> wrote:
>
>> 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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-- 
"Neither the voice of authority nor the weight of reason and argument are
as significant as experiment, for thence comes quiet to the mind."
R. Bacon


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com





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