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From: "Andy Cave" <andy.cave@hamillroad.com>
To: "Bob Friesenhahn" <bfriesen@simple.dallas.tx.us>
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Subject: Re: [Tiff] hot to detect corrupt tif file
Date: Wed, 1 Jun 2005 01:50:16 +0100
Organization: Hamillroad Software
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Status:   

Hi Bob.

Certainly in printing/prepress, most (if not all) images are compressed.

Where/why do people not compress them in the RGB/color world? Which 
applications don't do this? [Nice to see statements such as this backed up 
by 'proof'.]

Andy.

----- Original Message ----- 
From: "Bob Friesenhahn" <bfriesen@simple.dallas.tx.us>
To: "Andy Cave" <andy.cave@hamillroad.com>
Cc: "Bruno LEDOUX" <brunoledoux@optusnet.com.au>; "Tiff List" 
<tiff@remotesensing.org>
Sent: Wednesday, June 01, 2005 1:45 AM
Subject: Re: [Tiff] hot to detect corrupt tif file


> On Wed, 1 Jun 2005, Andy Cave wrote:
>
>> Since most images are compressed, checking the band/tile offsets & sizes 
>> (and then reading each band/tile) is a good way of checking for this 
>> (corrupt file).
>
> The above statement "most images are compressed" reveals your area of 
> focus.  In the RGB/color world, a large portion of the images are not 
> compressed, leading many people to believe that TIFF is an inefficient 
> format which does not support compression at all.  In the black/white 
> monochrome world, most images are compressed.
>
> Bob
> ======================================
> Bob Friesenhahn
> bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
>
>
> 


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