Hi Niall
We've noticed this in the MIDRIB project, too, especially in areas
of plain white. When you reduce the image in size and view it in
Netscape, it has a dotted "wallpaper" effect. I'm not technical, but
I'm told that this effect happens with other types of images, not just
GIF, and that it appears to be some kind of interference pattern. It
may be due to bugs, either in Netscape or in the graphics packages
the images have gone through, or in the file formats themselves.
Sorry, I can't offer a solution; we're looking for one too; but if we
get there first, I'll let you know what it is! Does anyone else know?
Jill Szuscikiewicz
MIDRIB Project Manager
Computer Unit, St George's Hospital Medical School
On Mon, 30 Sep 96 11:07:00 BST Niall Mackenzie wrote:
> From: Niall Mackenzie <[log in to unmask]>
> Date: Mon, 30 Sep 96 11:07:00 BST
> Subject: Spotted GIF's
> To: lis-elib <[log in to unmask]>
>
>
> Does anyone know why some GIF images when viewed
> through a browser get spots?
>
> In other words, a GIF image that looks fine in something
> like LViewPro or Paint Shop Pro suddenly picks up some
> foreign pixels. An electronic acne?
>
> I'm certain its something to do with pallette entries, quantizing,
> and colour depths but after exhaustive research I still can't
> cure the problem. Maybe there is a helper application that
> can Oxycute them.
>
> Any advice hugely appreciated.
>
> Niall MacKenzie
> TAPin project
> Research Assistant
> Centre for Information Research and Training
> School of Information Studies
> University of Central England
> Perry Barr
> Birmingham
> B42 2SU
>
> Tel. 0121-331 5619
> Fax 0121-331 5675
> email [log in to unmask]
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