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Re: GIF compression support in ImageMagick - Re-Post [message #41625 is a reply to message #41622]

Thu, 04 November 2004 10:55

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

Lince M Lawrence wrote:
> friends
>
> As in this message. How can I enable LZW in ImageMagick? Where should
> I alter the default option as advocated in the Quoted mail
> "--enable-lzw (configuration switch)"

That is an option to the "./configure" command, and applies if & only if
you are building from source. If you have installed a binary release,
the option may, or may not, have been applied when it was built.

The LZW patents on GIF have now expired (more or less). I believe
current releases of ImageMagick support LZW compression by default (but
I haven't checked and can't say for sure, as I never use GIF). So your
best solution may be to download and install the current version of
ImageMagick.

> Currrently I am using ImageMagick to convert EPS to GIF by punchin in
> the following command sequence in the command line:
>
> convert -antialias -transparent white -colors 16 -compress LZW
> eqn10.eps eqn10.gif
>
> The output should come around 4K, whiile using the above command I get
> a comparitively huge file of 20K. So I think the command "-compress
> LZW" is not executed correctly (may be due to the disabled LZW option)

It looks that way.

> Kindly pour-in your valuable comments.

Could you use PNG? It's much better in many respects.

--
Mark Hadfield "Ka puwaha te tai nei, Hoea tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)

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[Message index]

		Re: GIF compression support in ImageMagick - Re-Post By: Mark Hadfield on Mon, 08 November 2004 12:33
		Re: GIF compression support in ImageMagick - Re-Post By: Lince.Lawrence on Sun, 07 November 2004 19:52
		Re: GIF compression support in ImageMagick - Re-Post By: tam on Fri, 05 November 2004 06:37
		Re: GIF compression support in ImageMagick - Re-Post By: Ben Panter on Fri, 05 November 2004 02:16
		Re: GIF compression support in ImageMagick - Re-Post By: Lince.Lawrence on Fri, 05 November 2004 02:58
		Re: GIF compression support in ImageMagick - Re-Post By: Mark Hadfield on Thu, 04 November 2004 10:55
		Re: GIF compression support in ImageMagick - Re-Post By: Lince.Lawrence on Tue, 09 November 2004 06:12

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