[ 
http://jira.nuxeo.org/browse/NXSEM-9?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Olivier Grisel updated NXSEM-9:
-------------------------------

    Description: 
Same feature as NXSEM-8 but for picture content. Instead of using TF-IDF 
features we can use normalized gray level pixel values of a scaled down 
(100x100 or 500x500) version of the picture pre-propecessed using the GIST 
global picture descriptors [1] using the LEAR C implementation (GPL) and maybe 
post-ranking using leveraging a smarter features extraction layer based on SIFT 
[3] using the libsiftfast [4] library.

[5] provides a nice state of the art of related algorithms with scalability 
numbers.

The goal is to be able to lookup related pictures in DAM (right click + "find 
more pictures like this one") or to perform picture query by example.

[1] http://people.csail.mit.edu/torralba/code/spatialenvelope/
[2] http://lear.inrialpes.fr/~jegou/src.php
[3] 
http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/AV0405/MURRAY/SIFT.html
[4] http://sourceforge.net/projects/libsift/
[5] http://lear.inrialpes.fr/pubs/2009/DJSAS09/

  was:
Same feature as NXSEM-8 but for picture content. Instead of using TF-IDF 
features we can use normalized gray level pixel values of a scaled down 
(300x300 or 500x500) version of the picture or leveraging a smarter features 
extraction layer based on SIFT [1] using the libsiftfast [2] library.

The goal is to be able to lookup related pictures in DAM (right click + "find 
more pictures like this one") or to perform picture query by example.

[1] 
http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/AV0405/MURRAY/SIFT.html
[2] http://sourceforge.net/projects/libsift/


> CoreEventListener + service to build 64bits semantic hash of documents with 
> picture content
> -------------------------------------------------------------------------------------------
>
>                 Key: NXSEM-9
>                 URL: http://jira.nuxeo.org/browse/NXSEM-9
>             Project: Nuxeo Semantic R&D
>          Issue Type: Task
>            Reporter: Olivier Grisel
>            Assignee: Olivier Grisel
>
> Same feature as NXSEM-8 but for picture content. Instead of using TF-IDF 
> features we can use normalized gray level pixel values of a scaled down 
> (100x100 or 500x500) version of the picture pre-propecessed using the GIST 
> global picture descriptors [1] using the LEAR C implementation (GPL) and 
> maybe post-ranking using leveraging a smarter features extraction layer based 
> on SIFT [3] using the libsiftfast [4] library.
> [5] provides a nice state of the art of related algorithms with scalability 
> numbers.
> The goal is to be able to lookup related pictures in DAM (right click + "find 
> more pictures like this one") or to perform picture query by example.
> [1] http://people.csail.mit.edu/torralba/code/spatialenvelope/
> [2] http://lear.inrialpes.fr/~jegou/src.php
> [3] 
> http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/AV0405/MURRAY/SIFT.html
> [4] http://sourceforge.net/projects/libsift/
> [5] http://lear.inrialpes.fr/pubs/2009/DJSAS09/

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