Return-Path: <tiff-bounces@lists.maptools.org>
Received: from inas026.isp.belgacom.be (localhost [127.0.0.1])
        by inav015.isp.belgacom.be (8.12.11/8.12.11/Skynet-IN-AV-3.00) with ESMTP id j8PKYxmY002838
        for <joris.at.lebbeke@skynet.be>; Sun, 25 Sep 2005 22:34:59 +0200
        (envelope-from <tiff-bounces@lists.maptools.org>)
Received: from inmx012.isp.belgacom.be (inmx012.isp.belgacom.be [195.238.3.90])
        by inas026.isp.belgacom.be (8.12.11/8.12.11/Skynet-IN-AS-2.03) with ESMTP id j8PKYprs002869
        for <joris.at.lebbeke@skynet.be>; Sun, 25 Sep 2005 22:34:51 +0200
        (envelope-from <tiff-bounces@lists.maptools.org>)
Received: from duke.maptools.org (r153.dmsolutions.ca [209.217.116.153] (may be forged))
        by inmx012.isp.belgacom.be (8.12.11/8.12.11/Skynet-IN-2.32) with ESMTP id j8PKYlgG016207
        for <joris.at.lebbeke@skynet.be>; Sun, 25 Sep 2005 22:34:47 +0200
        (envelope-from <tiff-bounces@lists.maptools.org>)
Received: from duke.maptools.org (duke.maptools.org [127.0.0.1])
	by duke.maptools.org (8.12.11/8.12.10) with ESMTP id j8PKVD4X029093;
	Sun, 25 Sep 2005 16:31:31 -0400
Received: from scooby.simplesystems.org (scooby.simplesystems.org
	[65.66.246.67])
	by duke.maptools.org (8.12.11/8.12.10) with ESMTP id j8PKVBYm029090
	for <tiff@lists.maptools.org>; Sun, 25 Sep 2005 16:31:11 -0400
Received: from blade.simplesystems.org (blade.simplesystems.org [65.66.246.74])
	by scooby.simplesystems.org (8.12.10+Sun/8.12.10) with ESMTP id
	j8PKVA8a028667; Sun, 25 Sep 2005 15:31:10 -0500 (CDT)
Date: Sun, 25 Sep 2005 15:31:10 -0500 (CDT)
From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
X-X-Sender: bfriesen@blade.simplesystems.org
To: edward@sidefx.com
Subject: Re: [Tiff] Additional Lossless Compression Schemes
In-Reply-To: <2379.64.228.70.111.1127676458.squirrel@webmail.sidefx.com>
Message-ID: <Pine.SOC.4.60.0509251511570.19359@blade.simplesystems.org>
References: <2379.64.228.70.111.1127676458.squirrel@webmail.sidefx.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: TIFF <tiff@lists.maptools.org>
X-BeenThere: tiff@lists.maptools.org
X-Mailman-Version: 2.1.4
Precedence: list
List-Id: TIFF and libtiff discussion <tiff.lists.maptools.org>
List-Unsubscribe: <http://lists.maptools.org/mailman/listinfo/tiff>,
	<mailto:tiff-request@lists.maptools.org?subject=unsubscribe>
List-Archive: <http://lists.maptools.org/mailman/private/tiff>
List-Post: <mailto:tiff@lists.maptools.org>
List-Help: <mailto:tiff-request@lists.maptools.org?subject=help>
List-Subscribe: <http://lists.maptools.org/mailman/listinfo/tiff>,
	<mailto:tiff-request@lists.maptools.org?subject=subscribe>
Sender: tiff-bounces@lists.maptools.org
Errors-To: tiff-bounces@lists.maptools.org
X-UIDL: 000000000023ceae.00000c6e
X-MSP-STORE: Sun, 25 Sep 2005 22:35:05 +0200
Status:   

On Sun, 25 Sep 2005 edward@sidefx.com wrote:
> I'm not sure what Joris meant here by "large", I'd like to point out that
> more and more CG films are going to IMAX. According to one source
> (http://cat2.mit.edu/sagrada/cg.htm), the typical resolution here is 4K
> wide although the theoretical limit of IMAX is 8K.

If there is a theoretical limit for IMAX then I expect it is more like 
21K when the broadest part of the image is considered (IMAX frames are 
rotated sideways on 70mm film).  The NorthLight scanner is specified 
to scan IMAX at 8K.  I am not sure if this means that the narrow 
(70mm) edge is scanned at 8K, or if this is the rotated resolution.

IMAX frames have 10X the area of 35mm frames.  To put this in 
perspective, if a 10-bit 4K scan of a 35mm frame takes 50MB then a 
similar scan of an IMAX frame would take 500MB.

The largest 35mm film scan I have encountered is 16-bit and has the 
dimensions 5232x4376.  This requires 131MB of disk space.  10X that 
is 1.31GB of disk space.

CG will naturally require much larger files than a film scan.

http://history.acusd.edu/gen/filmnotes/imax.html

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
_______________________________________________
Tiff mailing list: Tiff@lists.maptools.org
http://lists.maptools.org/mailman/listinfo/tiff
http://www.remotesensing.org/libtiff/
