[Ham-Computers] RE: Scanning Text And Images Mixed

[Hsu, Aaron (NBC Universal)]

Duane,

Scan at 300dpi 8-bit grayscale (or 24-bit color if you need to save the
color).  Save each page as a seperate .TIF for maximum compatibility with
other programs.  Multi-page .TIF is OK if your apps support it, but it
requires a LOT of RAM if you have many pages (your app might load all the
pages before displaying).  LZW compression (lossless) is an option for .TIF
files; but, like multi-page, not all apps support it.

Uncompressed .TIF is the defacto "archive" format for graphics files.  .TIF
with LZW lossless compression will reduce filesize by about 20% on average,
depending on content.  Use .JPG (with minimal compression) only if storage
space is limited.

For reference:
 8x10 inch @ 300dpi @ 8-bit color/grayscale = 7MB raw image size
(uncompressed .TIF)
 8x10 inch @ 300dpi @ 24-bit color = 21MB raw image size (uncompressed .TIF)
 8x10 inch @ 300dpi @ 24-bit color = 5MB .JPG file at best quality with
minimal compression (4:1).

BTW, the "raw" sizes shown above also represent how much RAM is required to
load an entire image of that size and color depth.

73,

  - Aaron, NN6O


-----Original Message-----
From: ham-computers-bounces at mailman.qth.net
[mailto:ham-computers-bounces at mailman.qth.net] On Behalf Of Duane Fischer,
W8DBF
Sent: Thursday, August 11, 2005 12:57 PM
To: ham-computers at mailman.qth.net
Subject: [Ham-Computers] Scanning Text And Images Mixed


	
Hello All, 	

	I got a surprise last evening, what I was told was just text, is
not! It has some images mixed in, such as a cover sheet would. I showed it
to a friend and
he enlightened me. So, here we go one more once.	
	
What is the best resolution and mode to scan mixed text and graphics with
that
is to be saved to a CD, then transfered to a DVD?	
	
Yes it is possible that the viewer may want to print out the page.	
	
Because of constraints here, I can not use Adobe .pdf format. Each page will
remain as a stand alone within a folder dedicated to its particular theme.

	
Thank you gentlemen.	
	
Duane W8DBF	
dfischer at usol.com