| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22079] |
Tue, 24 October 2000 00:00 |
George N. White III
Messages: 56
Registered: September 2000
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Member |
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On Mon, 23 Oct 2000, Nick Bower wrote:
>> PNG's work fine, they're just not widely recognized yet.
>
> In what? Gimp/Photoshop, browsers and ghostscript all support it. What more
> could you want? :)
>
> nick
Some people produce multi-year series of images. Changing to PNG will
likely require updated color LUT's. If your system provides a library
with GIF support (e.g., SGI) it may be better to write your own IDL
routine to save GIF's.
Many people who work on unix systems are still running Photoshop 3, which
AFAIK does not support PNG.
--
George N. White III <gnw3@acm.org> Bedford Institute of Oceanography
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22087 is a reply to message #22079] |
Mon, 23 October 2000 22:48  |
R.Bauer
Messages: 1424
Registered: November 1998
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Senior Member |
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Paul Woodford wrote:
>
> In article <8stoek$8nl$1@nnrp1.deja.com>, Andrew <noymer@my-deja.com>
> wrote:
>
>> In my experience (which is
>> limited) PNG is just as good as GIF and is, of course,
>> unencumbered by the LZW compression patent crap.
>
> In my experience, PNG is much better than GIF. PNG supports 24-bit
> color; GIF does not. PNG also produces smaller files than GIF.
>
>
How did I create a png animation?
regards
Reimar
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22098 is a reply to message #22094] |
Mon, 23 October 2000 00:00 |
Paul Woodford
Messages: 43
Registered: June 2000
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Member |
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In article <8stoek$8nl$1@nnrp1.deja.com>, Andrew <noymer@my-deja.com>
wrote:
> In my experience (which is
> limited) PNG is just as good as GIF and is, of course,
> unencumbered by the LZW compression patent crap.
In my experience, PNG is much better than GIF. PNG supports 24-bit
color; GIF does not. PNG also produces smaller files than GIF.
--
Paul Woodford, Ph.D.
Essex Corporation
For faster email response, replace us dot net with essexcorp dot com
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22100 is a reply to message #22094] |
Mon, 23 October 2000 00:00 |
Craig Markwardt
Messages: 1869
Registered: November 1996
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Senior Member |
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"Mark C." <mychan@petro-canada.ca> writes:
> Any suggestions on:
>
> 1) Alternatives if one wants to create GIF files here after?
>
> 2) Has any one use other formats in IDL which will yield equal or better
> quality results to that of GIF?
One possibility, on Unix, is to output some other format and use the
NetPBM tools to convert to GIF. But that sucks. I make loads of GIFs
for an internal web page, so it sucks a lot. How is it that the
"premiere" image manipulation program can't do GIF?
I like Ed Santiago's suggestion of trying the old idl_gif DLMs to see
if they work. Has anybody tried it?
Craig
--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
------------------------------------------------------------ --------------
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22103 is a reply to message #22094] |
Mon, 23 October 2000 00:00 |
Med Bennett
Messages: 109
Registered: April 1997
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Senior Member |
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I guess I meant 'recognized by people' rather than 'recognized by software' -
almost everyone knows what a gif is, but if I can imagine that if I told someone
'I'm sending you a png' I might have some explaining to do.
Nick Bower wrote:
>> PNG's work fine, they're just not widely recognized yet.
>
> In what? Gimp/Photoshop, browsers and ghostscript all support it. What more
> could you want? :)
>
> nick
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22104 is a reply to message #22103] |
Mon, 23 October 2000 00:00 |
Ed Santiago
Messages: 8
Registered: January 2000
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Junior Member |
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> Any suggestions on:
>
>1) Alternatives if one wants to create GIF files here after?
Haven't tried this myself (don't have 5.4 yet), but unless RSI jumped
through hoops to explicitly disable this, you could try:
ARCH=<your arch, e.g., linux, alpha, solaris2, etc>
cp $IDL_53/bin/bin.$ARCH/idl_gif.* $IDL_54/bin/bin.$ARCH/
G'luck,
^E
--
Eduardo Santiago Software Type esm@lanl.gov RKBA!
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22105 is a reply to message #22104] |
Mon, 23 October 2000 00:00 |
Martin Schultz
Messages: 515
Registered: August 1997
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Senior Member |
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"Mark C." wrote:
>
> Any suggestions on:
>
> 1) Alternatives if one wants to create GIF files here after?
>
> 2) Has any one use other formats in IDL which will yield equal or better
> quality results to that of GIF?
>
> Thanks,
> Mark
Just use IDL <= 5.3 ;-)
Cheers,
Martin
--
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ [[[[[[[
[[ Dr. Martin Schultz Max-Planck-Institut fuer Meteorologie [[
[[ Bundesstr. 55, 20146 Hamburg [[
[[ phone: +49 40 41173-308 [[
[[ fax: +49 40 41173-298 [[
[[ martin.schultz@dkrz.de [[
[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ [[[[[[[
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22111 is a reply to message #22108] |
Sun, 22 October 2000 00:00 |
Theo Brauers
Messages: 58
Registered: November 1997
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Member |
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Med Bennett wrote:
>
> PNG's work fine, they're just not widely recognized yet. There are a
> bazillion viewers and utilities that translate from GIF <> PNG <> everything
> else, so I honestly don't see how Compuserve/Unisys ever hopes to enforce or
> make any money off of the GIF/LZW patent. Kind of silly to me that they
> even bother - why don't they just give it to the public domain, where it is
> pretty much in practice anyway?
Because they want to keep some law firms in business. There are a number
of prominent lawsuits in .de where companies sue people when they use a
name w/o the copyright (i.e. when you call your own program anyname-explorer).
Best Theo
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| Re: NO MORE GIF READ OR WRITE IN IDL 5.4 [message #22114 is a reply to message #22113] |
Sat, 21 October 2000 00:00 |
Med Bennett
Messages: 109
Registered: April 1997
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Senior Member |
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PNG's work fine, they're just not widely recognized yet. There are a
bazillion viewers and utilities that translate from GIF <> PNG <> everything
else, so I honestly don't see how Compuserve/Unisys ever hopes to enforce or
make any money off of the GIF/LZW patent. Kind of silly to me that they
even bother - why don't they just give it to the public domain, where it is
pretty much in practice anyway?
"Mark C." wrote:
> Any suggestions on:
>
> 1) Alternatives if one wants to create GIF files here after?
>
> 2) Has any one use other formats in IDL which will yield equal or better
> quality results to that of GIF?
>
> Thanks,
> Mark
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