lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Michael McCandless (JIRA)" <>
Subject [jira] Commented: (LUCENE-1629) contrib intelligent Analyzer for Chinese
Date Thu, 14 May 2009 14:50:45 GMT


Michael McCandless commented on LUCENE-1629:

OK, I just committed that fix (javadocs encoding == UTF-8) Uwe.  Thanks.

> contrib intelligent Analyzer for Chinese
> ----------------------------------------
>                 Key: LUCENE-1629
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/analyzers
>    Affects Versions: 2.4.1
>         Environment: for java 1.5 or higher, lucene 2.4.1
>            Reporter: Xiaoping Gao
>            Assignee: Michael McCandless
>             Fix For: 2.9
>         Attachments:, bigramdict.mem, build-resources-with-folder.patch,
build-resources.patch, build-resources.patch, coredict.mem, LUCENE-1629-encoding-fix.patch,
> I wrote a Analyzer for apache lucene for analyzing sentences in Chinese language. it's
called "imdict-chinese-analyzer", the project on google code is here:
> In Chinese, "我是中国人"(I am Chinese), should be tokenized as "我"(I)   "是"(am)
  "中国人"(Chinese), not "我" "是中" "国人". So the analyzer must handle each sentence
properly, or there will be mis-understandings everywhere in the index constructed by Lucene,
and the accuracy of the search engine will be affected seriously!
> Although there are two analyzer packages in apache repository which can handle Chinese:
ChineseAnalyzer and CJKAnalyzer, they take each character or every two adjoining characters
as a single word, this is obviously not true in reality, also this strategy will increase
the index size and hurt the performance baddly.
> The algorithm of imdict-chinese-analyzer is based on Hidden Markov Model (HMM), so it
can tokenize chinese sentence in a really intelligent way. Tokenizaion accuracy of this model
is above 90% according to the paper "HHMM-based Chinese Lexical analyzer ICTCLAL" while other
analyzer's is about 60%.
> As imdict-chinese-analyzer is a really fast and intelligent. I want to contribute it
to the apache lucene repository.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message