From owner-freebsd-questions@FreeBSD.ORG Mon Sep 7 03:09:57 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9E3211065670 for ; Mon, 7 Sep 2009 03:09:57 +0000 (UTC) (envelope-from mdc@prgmr.com) Received: from mail.prgmr.com (mail.prgmr.com [64.62.173.114]) by mx1.freebsd.org (Postfix) with ESMTP id 8CC168FC17 for ; Mon, 7 Sep 2009 03:09:57 +0000 (UTC) Received: from frylock.local (c-71-202-68-54.hsd1.ca.comcast.net [71.202.68.54]) by mail.prgmr.com (Postfix) with ESMTP id 5609D68B5B for ; Sun, 6 Sep 2009 20:12:46 -0700 (PDT) Message-ID: <4AA47981.1090103@prgmr.com> Date: Sun, 06 Sep 2009 20:09:53 -0700 From: Michael David Crawford Organization: Prgmr.com User-Agent: Thunderbird 2.0.0.22 (Macintosh/20090605) MIME-Version: 1.0 CC: freebsd-questions@freebsd.org References: <20090906012107.E2731B7DD@kev.msw.wpafb.af.mil> In-Reply-To: <20090906012107.E2731B7DD@kev.msw.wpafb.af.mil> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: Is there such thing as a 'soft checksum' tool? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Sep 2009 03:09:57 -0000 > M> I'm looking for a pseudo-checksum tool for use with cataloging images. I've seen such tools advertised, but they were proprietary products and only worked on windows. One way you could approach it might be to use a blur filter to blur each of your images, and then to compare the blurred images. Small differences in individual pixels would be blurred away. Mike -- Michael David Crawford mdc@prgmr.com prgmr.com - We Don't Assume You Are Stupid. Xen-Powered Virtual Private Servers: http://prgmr.com/xen