Date   : Mon, 23 Jun 2008 21:13:13 +0100
From   : C.J.Thornley@... (Chris Thornley)
Subject: The Micro User

Also with a decent scanner you should be able to select or adjust a colour
filter. i.e. if the page had yellowed over the age you can tell the scanner
to exclude the red channel.

Chris


               />      Christopher J. Thornley is cjt@...
  (           //------------------------------------------------------,
 (*)OXOXOXOXO(*>=*=O=S=U=0=3=6=*=---------                             >
  (           \\------------------------------------------------------'
               \>       Home Page :-http://www.coolrose.fsnet.co.uk
 
-----Original Message-----
From: bbc-micro-bounces+c.j.thornley=coolrose.fsnet.co.uk@...
[mailto:bbc-micro-bounces+c.j.thornley=coolrose.fsnet.co.uk@...
uk] On Behalf Of Jules Richardson
Sent: 23 June 2008 15:02
To: bbc-micro@...
Subject: Re: [BBC-Micro] The Micro User

Mike Tomlinson wrote:
> In article <314mFTNIO6388S10.1213970833@...>, Dave 
> Moore <dllm@...> writes
>> (I can't help but feel 600dpi is overkill for magazines, as you'd end 
>> up requiring terabytes and terabytes of space to store the lossless
versions).
> 
> The files should be highly compressible though?

Not in my experience - there tends to be a lot of noise in the data which
reduces the compression algorithm's efficiency. It is possible to skew the
greyscale range (i.e. fold several tones into one, just not linearly) in
order to reduce filesize, but then it requires extra visual checks to make
sure that important data's not being lost.

This is one area where it's nice that storage is so cheap these days!

cheers

Jules


_______________________________________________
bbc-micro mailing list
bbc-micro@...
http://lists.cloud9.co.uk/mailman/listinfo/bbc-micro