Re: GIF encoding

On Tue, 25 Sep 2007 16:04:43 GMT, "Andrew Thompson" <u32984@uwe>
wrote, quoted or indirectly quoted someone who said :

I had not realised GIF's could have 'compression'.

This is a sore point Unisys got hold of the patent to LZW compression
used in GIF and they started threatening people with it. It is
expired now, though you never know what a lawyer could do.

I think though your code does do LZW, thumbing its nose at Unisys.

This is one reason why the move is to PNG which is an open format.
The other reason is it has variable transparency.

See http://mindprod.com/jgloss/png.html

I have removed nearly all the GIF files off my website. I converted
them to PNG. A few avatars still have to be in GIF since they are
used by dinosaur sites.
--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com
.

Relevant Pages

  • Re: Warning to people working in fractals and chaos
    ... Unisys just after Christmas 1994. ... PNG was designed over the next ... it must be my fuzzy memory of various dissatisfactions with GIF ...
    (sci.fractals)
  • Re: Publisher to Firefox
    ... I have the updated "PNG" versions online and they look great on Firefox. ... You need to remove the border art from the image and add it to a second text ... then I would guess that it will be superior to the poor quality GIF ... Please repost your question in the web design group and we will pursue it ...
    (microsoft.public.publisher)
  • Re: Publisher to Firefox
    ... The allow PNG selection in the Options tabs looks like it ... You need to remove the border art from the image and add it to a second text ... then I would guess that it will be superior to the poor quality GIF ... Compress graphics file sizes to create smaller Publisher Web ...
    (microsoft.public.publisher)
  • PNG? [was Re: ANNC: PortaCello3]
    ... >>Check out also the new scroller screen shot, ... >>work of our own David Steuber, which he has made available with ... I just now told ImageMagick to write it out as PNG instead of JPG ... and it came out five times bigger, twice as big as GIF. ...
    (comp.lang.lisp)
  • RE: DBD::Chart copying and pasting...
    ... Firstly, I was saving with the PNG format, then I changed to GIF, but with no avail. ... I've set my Background to transparent. ...
    (perl.dbi.users)