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LF: Re: Grabber image format

To: <[email protected]>
Subject: LF: Re: Grabber image format
From: "Alan Melia" <[email protected]>
Date: Sun, 10 Dec 2006 23:30:16 -0000
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Hi Markus, the png file picture displays fine here too. Using IE 6 with
Win98SE. I dont remember putting anything special in for pngs but I do have
Irfanview loaded somewhere as well.

Best Wishes de Alan G3NYK

----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: 10 December 2006 22:23
Subject: LF: Grabber image format

> Dear LF Group,
> today I have changed the 8-bit image format for my grabber from .gif to
> 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
> but the halved colour resolution soon turned out inadequate for many fine
> details on the colour-DF display. With 256 colours and lossless
> 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
> the original bitmap (gamma=1.49 in IrfanView) before reducing to 8 bits,
> then darkening the colour table again (gamma=0.67) before uploading.
> Please report if you find any difficulties displaying or downloading the
> images.
> 73 de Markus, DF6NM

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