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Science Forum Index » Compression Forum » Bilevel image compression
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| Guest |
 Posted: Sat Apr 12, 2008 11:29 am |
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I've been looking around for a decent and free (as in speech) bilevel
image encoder/decoder. Maybe my google-fu isn't up to par, but the
best I can do seems to be JBIG (which certainly does not seem to be
free). Any recommendations?
-- John |
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| Mark Adler |
| Posted: Sat Apr 12, 2008 6:01 pm |
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| Guest |
| Posted: Sun Apr 13, 2008 5:04 am |
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Quote: However, you probably confuse two things: An "IP right" cannot be GPL'd.
GPL is a licence on the source code, IP rights are rights on the "idea",
so these are two different things. If you get a licence from an IP
holder, you can of course use this licence to implement a code under
GPL. I'm not a lawer, but things like that happened already in the past
(e.g. the JPEG2000 Jasper is GPL code, but the IP rights are in the
hands of several companies. Still, you can get the IP rights royality
free, and put the source under GPL).
Ah, thanks. I was under the impression that patented algorithms will
generally require royalties even though the source code is GPL. |
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| Thomas Richter |
| Posted: Sun Apr 13, 2008 5:06 am |
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john.awesome@gmail.com wrote:
Quote: I've been looking around for a decent and free (as in speech) bilevel
image encoder/decoder. Maybe my google-fu isn't up to par, but the
best I can do seems to be JBIG (which certainly does not seem to be
free). Any recommendations?
JBIG is not licence free, but the baseline profile should be licence-fee
free. However, you will run into the very same "problem" with almost any
standardized image codec.
However, you probably confuse two things: An "IP right" cannot be GPL'd.
GPL is a licence on the source code, IP rights are rights on the "idea",
so these are two different things. If you get a licence from an IP
holder, you can of course use this licence to implement a code under
GPL. I'm not a lawer, but things like that happened already in the past
(e.g. the JPEG2000 Jasper is GPL code, but the IP rights are in the
hands of several companies. Still, you can get the IP rights royality
free, and put the source under GPL).
So long,
Thomas |
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| Thomas Richter |
| Posted: Sun Apr 13, 2008 12:04 pm |
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Guest
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john.awesome@gmail.com wrote:
Quote: However, you probably confuse two things: An "IP right" cannot be GPL'd.
GPL is a licence on the source code, IP rights are rights on the "idea",
so these are two different things. If you get a licence from an IP
holder, you can of course use this licence to implement a code under
GPL. I'm not a lawer, but things like that happened already in the past
(e.g. the JPEG2000 Jasper is GPL code, but the IP rights are in the
hands of several companies. Still, you can get the IP rights royality
free, and put the source under GPL).
Ah, thanks. I was under the impression that patented algorithms will
generally require royalties even though the source code is GPL.
It depends on the vendors what the royalties are. They can be $0, though
formally you would need them. Further, it of course depends on the
vendors what type of contract you get, i.e. whether the licence is
transferable. For WG1, the general statement is "royality free on a
non-discriminatory basis" if I remember correctly, short RAND-Z. I'm not
sure whether this implies "transferable licence", the safest option is
to ask the IP holders you find mentioned in any IS.
However, and this is really only an informal statement from my side, I
do not remember having seen an approach of the authors of Jasper, for
example, of the IP owners. Thus, the practice (though not the law) is
that nobody really cares about the enforcement of RAND-Z (the exact term
for what I mentioned above) licences, because there is really not much
to own from them. Of course, *formally* and to be 100% on the safe side,
contact the lawer of your least distrust, and let him/her contact the IP
owners. (That, however, is rarely for free. (-;)
Disclaimer: This is not a valid legal advice. It expresses only my
personal experience.
So long,
Thomas |
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