On 23 dec, 04:46, DaveN <[email protected]> wrote:
> From the SURF page (interesting that the SURF page says it is
> copyrighted but there is no mention of a patent)

I checked the files they provide, and those contain a LICENSE file,
which I'll quote below. Indeed nothing is mentioned about patents
anywhere. I've checked 2 papers on the subject [0-1]: nothing there
either, nor is it mentioned on the Wikipedia page [2]. On an OpenCV
discussion [3] however I found a link to a page that show that indeed
there is a patent [4] (full text available from that site, upper
right).

[0] ftp://ftp.vision.ee.ethz.ch/publications/articles/eth_biwi_00517.pdf
[1] http://www.vision.ee.ethz.ch/~surf/eccv06.pdf
[2] http://en.wikipedia.org/wiki/SURF
[3] http://n2.nabble.com/SURF-protected-by-patent-td3458734.html
[4] http://v3.espacenet.com/publicationDetails/biblio?CC=EP&NR=2027558A2&FT=D

--
Bart

-----
LICENSE CONDITIONS

Copyright (2006): ETH Zurich, Switzerland
Katholieke Universiteit Leuven, Belgium
All rights reserved.

For details, see the paper:
Herbert Bay,  Tinne Tuytelaars,  Luc Van Gool,
 "SURF: Speeded Up Robust Features"
Proceedings of the ninth European Conference on Computer Vision, May
2006

Permission to use, copy, modify, and distribute this software and
its documentation for educational, research, and non-commercial
purposes, without fee and without a signed licensing agreement, is
hereby granted, provided that the above copyright notice and this
paragraph appear in all copies modifications, and distributions.

Any commercial use or any redistribution of this software
requires a license from one of the above mentioned establishments.

For further details, contact Andreas Ess ([email protected]).
-----

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