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Archiver > Freepages-Help > 2000-01 > 0948898905


From: "James P. Kirby" <>
Subject: Re: [FreeHelp] Photos AGAIN
Date: Wed, 26 Jan 2000 09:01:45 -0600 (CST)


>
What you say about GIF format is true, but the size of a JPEG format file
depends mostly on the compression used. A JPEG with no compression can be larger
than a GIF of the same picture. GIF format supports 8-bit color and JPEG
supports 24 bit color and was developed for photographs.
File size in bytes
94854 Jan 26 08:33 fatima1.gif saved as gif from original
42582 Jan 25 11:17 fatima1.jpg original (probably 80%)
90729 Jan 26 08:33 fatima1a.jpg saved as 100% of Original
20084 Jan 26 08:34 fatima1b.jpg saved as 70% of Original

The greater the comression the grainier the picture will look.

Regards,

James Kirby

> >I saved several graphics (not photos, but "drawn" graphics) as both GIF
> >and JPEG. On the average, four out of five were significantly smaller in
> >JPEG format. One out of five was slightly larger in GIF.
>
>
> GIF file sizes relate directly to the number of colors included. Simple
> graphics with 10 or fewer colors will usually make smaller file sizes in the
> GIF format. Photos or complicated graphics (color or gray scale) with
> dozens or hundreds of colors will ALWAYS be smaller in JPEG format.
>
> Pat Asher
> Proud Rootsweb Sponsor
> Ambrose Genealogy:
> http://freepages.genealogy.rootsweb.com/~pasher/
>
> _____________________________

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