X-GM-THRID: 1222420704841418116 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.70.56.11 with SMTP id e11cs374439wxa; Sun, 10 Dec 2006 15:44:06 -0800 (PST) Received: by 10.78.117.10 with SMTP id p10mr1283579huc.1165794245980; Sun, 10 Dec 2006 15:44:05 -0800 (PST) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id 4si1881939hue.2006.12.10.15.44.04; Sun, 10 Dec 2006 15:44:05 -0800 (PST) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1GtYI6-0007Ip-4V for rs_out_1@blacksheep.org; Sun, 10 Dec 2006 23:41:06 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1GtYI2-0007Ig-Ha for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2006 23:41:02 +0000 Received: from smtp5-g19.free.fr ([212.27.42.35]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1GtYQj-0000fB-Bw for rsgb_lf_group@blacksheep.org; Sun, 10 Dec 2006 23:50:06 +0000 Received: from [127.0.0.1] (unknown [82.247.200.10]) by smtp5-g19.free.fr (Postfix) with ESMTP id 242A3279CA for ; Mon, 11 Dec 2006 00:40:55 +0100 (CET) Message-ID: <457C9B07.6060605@online.fr> Date: Mon, 11 Dec 2006 00:40:55 +0100 From: =?ISO-8859-1?Q?Jean-Pierre_M=E9r=E9?= User-Agent: Thunderbird 1.5.0.8 (Windows/20061025) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <3f5.12571ae4.32ade2fe@aol.com> <002101c71cad$b7847660$bd01a8c0@acer9412> In-Reply-To: <002101c71cad$b7847660$bd01a8c0@acer9412> X-Antivirus: avast! (VPS 0655-1, 08/12/2006), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: Grabber image format Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 4513 Hi Markus , Good no problem ! 73 qro Jean-Pierre f1afj > ----- Original Message ----- > *From:* MarkusVester@aol.com > *To:* rsgb_lf_group@blacksheep.org > > *Sent:* Sunday, December 10, 2006 11:23 PM > *Subject:* LF: Grabber image format > > Dear LF Group, > > today I have changed the 8-bit image format for my grabber from > .gif to .png. This appears to save some 20% of volume, due to a > more effective lossless compression algorithm. > > When I started grabber operation I had tried various flavours of > .jpg first, but the halved colour resolution soon turned out > inadequate for many fine details on the colour-DF display. With > 256 colours and lossless compression, resolution looked much > better, but very weak signals and noise details tended to get > masked off by too few dark palette entries. I got around that by > brightening the original bitmap (gamma=3D1.49 in IrfanView) before > reducing to 8 bits, and then darkening the colour table again > (gamma=3D0.67) before uploading. > > Please report if you find any difficulties displaying or > downloading the .png images. > > 73 de Markus, DF6NM > > http://members.aol.com/df6nm/Grabber.htm > --=20 Visitez mon site radioamateur =E0 : http://jpmere.online.fr/ Analys=E9 avec AVAST Home =E9dition , garanti sans virus connu