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From Geert-Jan Brits <gbr...@gmail.com>
Subject Re: Search based on images
Date Sat, 11 Dec 2010 11:04:38 GMT
Well-known algorithms for detecting 'highly descriptive features'  in images
that can cope with scaling and rotation (up to a certain degree of course)
are
SIFT and SURF (SURF is generally considered the more mature of the two
afaik)

http://en.wikipedia.org/wiki/Scale-invariant_feature_transform
http://en.wikipedia.org/wiki/SURF

<http://en.wikipedia.org/wiki/SURF>that link comes with links to the
original papers as well as a list of open-source implementations, e.g:
http://code.google.com/p/javasurf/

<http://code.google.com/p/javasurf/>I don't have experience with the
open-source code myself, and you probably have to make a similiary-like
method based on the more low-level methods that implement these algorithms.
So this is perhaps a more 'down in the trenches' -approach, but at least it
should give you some solid background on how this is done.

Geert-Jan

2010/12/11 Dennis Gearon <gearond@sbcglobal.net>

> Tried one, of Perry Mason's secretary when she was young (and HOOOOOOOT),
> Barbara Hale.
> http://www.skylighters.org/ggparade/index8.html
>
> Didn't find it. 1.8 billion images indexed is probably a DROP in the bucket
> of
> what's out there.
>
>  Dennis Gearon
>
>
> Signature Warning
> ----------------
> It is always a good idea to learn from your own mistakes. It is usually a
> better
> idea to learn from others’ mistakes, so you do not have to make them
> yourself.
> from 'http://blogs.techrepublic.com.com/security/?p=4501&tag=nl.e036'
>
>
> EARTH has a Right To Life,
> otherwise we all die.
>
>
>
> ----- Original Message ----
> From: Dennis Gearon <gearond@sbcglobal.net>
> To: solr-user@lucene.apache.org
> Sent: Fri, December 10, 2010 9:24:53 PM
> Subject: Re: Search based on images
>
> Threre is actually some image recognition search engine software  somewhere
> I
> heard about. Take a picture of something, say a poster,  upload it, and it
> will
> adjust for some lighting/angle/distortion, and  try to find it on the web
> somewhere.
>
> You hear about crazy stuff like this at dev camps. Basically, handme downs
> from
> Homeland Security and the military ;-)
> Dennis Gearon
>
>
> Signature Warning
> ----------------
> It is always a good idea to learn from your own mistakes. It is usually a
> better
>
> idea to learn from others’ mistakes, so you do not have to make them
> yourself.
> from 'http://blogs.techrepublic.com.com/security/?p=4501&tag=nl.e036'
>
>
> EARTH has a Right To Life,
> otherwise we all die.
>

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