Received: from sgi.sgi.com (192.48.153.1) by cerious.com
 with SMTP (Apple Internet Mail Server 1.1.1); Thu, 13 Mar 1997 05:43:21 -0500
Received: from cthulhu.engr.sgi.com (cthulhu.engr.sgi.com [192.26.80.2]) by sgi.sgi.com (950413.SGI.8.6.12/950213.SGI.AUTOCF) via ESMTP id CAA02287; Thu, 13 Mar 1997 02:35:02 -0800
Received: (from daemon@localhost) by cthulhu.engr.sgi.com (950413.SGI.8.6.12/960327.SGI.AUTOCF) id CAA04523 for tiff-list; Thu, 13 Mar 1997 02:53:06 GMT
Received: from sgi.sgi.com (sgi.engr.sgi.com [192.26.80.37]) by cthulhu.engr.sgi.com (950413.SGI.8.6.12/960327.SGI.AUTOCF) via ESMTP id SAA04508 for <tiff-relay@relay.engr.sgi.com>; Wed, 12 Mar 1997 18:53:04 -0800
Received: from mothra.Trimble.COM (mothra.trimble.com [206.40.88.20]) by sgi.sgi.com (950413.SGI.8.6.12/950213.SGI.AUTOCF) via ESMTP id SAA21897 for <tiff@sgi.com>; Wed, 12 Mar 1997 18:52:59 -0800
Received: from Trimble.COM by mothra.Trimble.COM (SMI-8.6/SMI-SVR4)
	id SAA13909; Wed, 12 Mar 1997 18:54:58 -0800
Received: from ukko.trimble.co.nz by Trimble.COM (4.1/SMI-4.1)
	id AA09782; Wed, 12 Mar 97 18:59:04 PST
Received: from fs1.trimble.co.nz (fs1.trimble.co.nz [155.63.248.10])
	by ukko.trimble.co.nz (8.8.5/8.8.5) with ESMTP id PAA04703
	for <tiff@sgi.com>; Fri, 14 Mar 1997 15:53:59 +1300
Received: from TNZ-FS1/SpoolDir by fs1.trimble.co.nz (Mercury 1.21);
    13 Mar 97 15:56:57 +1300
Received: from SpoolDir by TNZ-FS1 (Mercury 1.30); 13 Mar 97 15:56:40 +1300
From: "Dennis Connor" <Dennis.Connor@trimble.co.nz>
Organization: Trimble Navigation New Zealand
To: tiff@sgi.com
Date: Thu, 13 Mar 1997 15:56:34 +1300
Subject: Re: Palette sizes
Priority: normal
X-Mailer: Pegasus Mail for Windows (v2.42)
Message-Id: <23B1AC85AC6@fs1.trimble.co.nz>
Sender: owner-tiff@relay.engr.SGI.COM
Precedence: bulk
Status: R

> I have found some TIFF files with palette sizes less than 3 * (2**BitsPerSample)
> i.e, a files with a palette of 230, not 256, colors. 

> But i have seen some images with this settings. I don't know the  origin, there is 
>no reference of any source inside this files. They store palettes of 
>fewer  number of colors, only the ones that the image data references.
> 
>What am I supposed to think, this is a wrong tiff, a corrupted 
>file or a good and readable tiff ?

Good & readable.   In my experience, this is often the case.   In any 
case, you only need the palette for the colors used......


Dennis Connor

 
