Received: from mailgate003.isp.belgacom.be (mailgate003.isp.belgacom.be [195.238.6.88])
	by maildelivery022.isp.belgacom.be (Postfix) with ESMTP id 156FC1A4083
	for <joris.at.lebbeke@skynet.be>; Fri, 11 Jan 2008 02:19:48 +0100 (CET)
Received: from r153.dmsolutions.ca (HELO duke.maptools.org) ([209.217.116.153])
  by in.mx.skynet.be with ESMTP; 11 Jan 2008 02:19:48 +0100
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 m0B11QVJ011790;
	Thu, 10 Jan 2008 20:02:15 -0500
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 m0B0xqRv011719
	for <tiff@lists.maptools.org>; Thu, 10 Jan 2008 19:59:52 -0500
Received: from freddy.simplesystems.org (freddy.simplesystems.org
	[65.66.246.65])
	by scooby.simplesystems.org (8.12.10+Sun/8.12.10) with ESMTP id
	m0B0xfCI012806; Thu, 10 Jan 2008 18:59:41 -0600 (CST)
Date: Thu, 10 Jan 2008 18:59:41 -0600 (CST)
From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
X-X-Sender: bfriesen@freddy.simplesystems.org
To: Nikhil Shirahatti <shirahatti@gmail.com>
Subject: Re: [Tiff] LibTiff..Reading partial strips
In-Reply-To: <fb91ffe0801101504s44de11ebw9ac61b28e01e706a@mail.gmail.com>
Message-ID: <Pine.SOC.4.64.0801101858540.2557@freddy.simplesystems.org>
References: <fb91ffe0801101103o3addbc5bhd6fb7234fbef1216@mail.gmail.com> 
	<Pine.SOC.4.64.0801101531190.2557@freddy.simplesystems.org> 
	<fb91ffe0801101340g1ea9c156h11b53e0d1aa7a03e@mail.gmail.com> 
	<4786976C.7030502@pobox.com>
	<fb91ffe0801101448l52a29d76q3cf0fad4fb9987e@mail.gmail.com>
	<fb91ffe0801101504s44de11ebw9ac61b28e01e706a@mail.gmail.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Cc: 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.000029d8
X-MSP-STORE: Fri, 11 Jan 2008 02:19:49 +0100
Status:   

On Thu, 10 Jan 2008, Nikhil Shirahatti wrote:

> Also, I may only want to read the first N pixels ..lets say the interesting
> data was in the first N pixels ..then why read the remaining?
> If the ReadStrip is done several times(lets say 10000 rows) then each time
> we end up reading M pixels (M >> N)  rather than N..and this does cause a
> performance hit..

It sounds like you will need to write your own TIFF reader in order to 
satisfy these many complex objectives.

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/
