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simhash's Introduction

simhash

高效的文本相似度去重算法实现

simhash是什么

Google发明的的文本去重算法,适合于大批量文档的相似度计算

主要步骤

  • 对文本分词,得到N维特征向量(默认为64维)
  • 为分词设置权重(tf-idf)
  • 为特征向量计算哈希
  • 对所有特征向量加权,累加(目前仅进行非加权累加)
  • 对累加结果,大于零置一,小于零置零
  • 得到文本指纹(fingerprint)

simhash's People

Contributors

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Watchers

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