CentroidSummarizer.php
SeekQuarry/Yioop -- Open Source Pure PHP Search Engine, Crawler, and Indexer
Copyright (C) 2009 - 2023 Chris Pollett chris@pollett.org
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This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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Tags
Interfaces, Classes, Traits and Enums
- CentroidSummarizer
- Class which may be used by TextProcessors to get a summary for a text document that may later be used for indexing. This is done by the @see getSummmary method. getSummary does this splitting the document into sentences and computing inverse sentence frequency (should be ISL, but we call IDF) scores for each term. It then computes an average document vector (we call centroid) with components (total number of occurrences of term) * (IDF score of term).