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Message-ID: <457DC97E.3050902@xs4all.nl>
Date: Mon, 11 Dec 2006 22:11:26 +0100
From: Ko Versteeg <nl9222@xs4all.nl>
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To: rsgb_lf_group@blacksheep.org
References: <3f5.12571ae4.32ade2fe@aol.com>
In-Reply-To: <3f5.12571ae4.32ade2fe@aol.com>
Subject: Re: LF: Grabber image format
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MarkusVester@aol.com wrote:
> Dear LF Group,
>=20
> today I have changed the 8-bit image format for my grabber from .gif to=
=20
> .png. This appears to save some 20% of volume, due to a more effective=20
> lossless compression algorithm.
>=20
> When I started grabber operation I had tried various flavours of .jpg=20
> first, but the halved colour resolution soon turned out inadequate for=20
> many fine details on the colour-DF display. With 256 colours and=20
> lossless compression, resolution looked much better, but very weak=20
> signals and noise details tended to get masked off by too few dark=20
> palette entries. I got around that by brightening the original bitmap=20
> (gamma=3D1.49 in IrfanView) before reducing to 8 bits, and then darkeni=
ng=20
> the colour table again (gamma=3D0.67) before uploading.
>=20
> Please report if you find any difficulties displaying or downloading th=
e=20
> .png images.
>=20
> 73 de Markus, DF6NM
>=20
> http://members.aol.com/df6nm/Grabber.htm

Hi Markus
No problem here either
I am using .PNG for 2 years now on the website for some images, 6 i guess
that have to be clear [ without .JPG fringing and discoloring]

73 and Season Greetings, Ko.
--=20
  NL9222  "The only way out is Through"
  Loc: JO22KE [ Lat: 52=B0 12' 15.89" N ~ Lon: 04=B0 51' 42.04" E ]
  WWW: http://www.xs4all.nl/~nl9222


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