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From Lance Norskog <goks...@gmail.com>
Subject Re: Using Lucene/Solr for Plagiarism detection
Date Fri, 31 Dec 2010 00:23:09 GMT
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On Thu, Dec 30, 2010 at 8:28 AM, Amel Fraisse <amel.fraisse@gmail.com> wrote:
> Hello,
>
> No I'm not using cosine similarity metrics.
>
>
> 2010/12/30 Shashi Kant <skant@sloan.mit.edu>
>
>> Have you considered using document similarity metrics such as Cosine
>> Similarity?
>>
>>
>> On Thu, Dec 30, 2010 at 6:05 AM, Amel Fraisse <amel.fraisse@gmail.com>
>> wrote:
>> > Hello,
>> >
>> > I am using Lucene for plagiarism detection.
>> >
>> > The goal is that: when I have a new document, I will check on the solr
>> index
>> > if there is a document that contain some common chunk.
>> >
>> > So to compute similarity between the query and a source document I would
>> use
>> > this formula :
>> >
>> > Score (suspicious document, source document) = Number of common chunk
>> > between source document and suspicious document  / Number of total chunk
>> in
>> > the suspicious document.
>> >
>> > So I have to change the scoring formula in the Similarity class.
>> >
>> > How can I change the scoring formula? ( by customizing only the
>> Similarity
>> > class? or Scorer?)
>> >
>> > Do you have an Example of this use case?
>> >
>> > Thank for your help.
>> >
>>
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>>
>
>
> --
> --------------
> Amel Fraisse
>



-- 
Lance Norskog
goksron@gmail.com

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