[Coco] [Color Computer] 1984 djvu conversion

[Tim Fadden]

Strangely enough, I just scanned 1982-07, 64 pages.  I did the pages 
with color in color, and the rest greyscale, 300dpi.  The total size of 
the pages in jpeg images is 97 meg.  I then used two different programs 
to create a pdf document.  Both were set for 300 dpi. 100% quality.  one 
converter made a pdf at 41meg, and the other turned out 168 meg!  go 
figure that out!...   I looked at both of them with acroread and 
enlarged to 1600%  I couldn't tell the difference between the files.   
All pdf creators are not equal!..


Tim




Bob Devries wrote:
> I'm using ScanGear CS which came with my CanoScan 5200F scanner. It 
> integrates into Adobe Acrobat Pro 6 through the TWAIN interface.
>
> I'm scanning in black & white at 300DPI. There are no other settings 
> available in that mode.
>
> -- 
> Regards, Bob Devries, Dalby, Queensland, Australia
>
> Isaiah 50:4 The sovereign Lord has given me
> the capacity to be his spokesman,
> so that I know how to help the weary.
>
> website: http://www.home.gil.com.au/~bdevasl
> my blog: http://bdevries.invigorated.org/
>
> ----- Original Message ----- From: "Tim Fadden" <t.fadden at cox.net>
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Sent: Tuesday, May 19, 2009 11:19 AM
> Subject: Re: [Coco] [Color Computer] 1984 djvu conversion
>
>
>> There are lots of variables.  Did the scanner do color, greyscale, or 
>> line art?  When the pdf was made, was it created at 300dpi, also 
>> there are settings for % of quality.  All of those affect the file size.
>>
>> Tim
>>
>> Bob Devries wrote:
>>> HAHAHAHA,
>>>
>>> I was going to suggest that our scanners "downunder" are more 
>>> efficient, but Dez is an Aussie too. Of course, he *IS* closer to 
>>> the equator than I am.....
>>>
>>> -- 
>>> Regards, Bob Devries, Dalby, Queensland, Australia
>>>
>>> Isaiah 50:4 The sovereign Lord has given me
>>> the capacity to be his spokesman,
>>> so that I know how to help the weary.
>>>
>>> website: http://www.home.gil.com.au/~bdevasl
>>> my blog: http://bdevries.invigorated.org/
>>>
>>> ----- Original Message ----- From: "John W. Linville" 
>>> <linville at tuxdriver.com>
>>> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>>> Sent: Tuesday, May 19, 2009 9:55 AM
>>> Subject: Re: [Coco] [Color Computer] 1984 djvu conversion
>>>
>>>
>>>> On Tue, May 19, 2009 at 09:50:01AM +1000, Bob Devries wrote:
>>>>> I have difficulty understanding why the PDF files of these 
>>>>> magazines are
>>>>> so large.
>>>>>
>>>>> I have scanned some of my copies of Australian Rainbow. All pages 
>>>>> except
>>>>> the front and back covers are black & white, and I scanned them at 
>>>>> 300
>>>>> DPI. They are readable... as much as the originals were readable (but
>>>>> that's another story)... but they are not text searchable.
>>>>>
>>>>> Of the 30 magazines I scanned, the largest PDF file size was 
>>>>> 6939KB from
>>>>> 76 pages (275mm x 205mm) and the smallest 1800KB from 60 pages.
>>>>
>>>> Perhaps you are measuring using metric bytes?  I think they are 
>>>> bigger...
>>>>
>>>> :-) :-) :-)
>>>>
>>>> John
>>>> -- 
>>>> John W. Linville Someday the world will need a hero, and you
>>>> linville at tuxdriver.com might be all we have.  Be ready.
>>>>
>>>> -- 
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>>>
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>>>
>>
>>
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