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simhash's Introduction

专门针对中文文档的simhash算法库 English

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简介

此项目用来对中文文档计算出对应的 simhash 值。 simhash 是谷歌用来进行文本去重的算法，现在广泛应用在文本处理中。

详见simhash算法原理及实现

特性

  • 使用 CppJieba 作为分词器和关键词抽取器
  • 使用 jenkins 作为 hash 函数
  • hpp 风格，所有源码都是 .hpp 文件里面，方便使用。 没有链接，就没有伤害。
  • 本项目的副产品项目：simhash_server 提供了简单的 simhash HTTP 服务。

依赖

  • g++ (version >= 4.1 recommended), or clang++ .

用法

mkdir build
cd build
cmake ..
make

测试

make test

演示

./demo

结果如下：

文本："我是蓝翔技工拖拉机学院手扶拖拉机专业的。不用多久，我就会升职加薪，当上总经理，出任CEO，走上人生巅峰。"
关键词序列是: ["蓝翔:11.7392", "CEO:11.7392", "升职:10.8562", "加薪:10.6426", "手扶拖拉机:10.0089"]
simhash值是: 17831459094038722629
100010110110和110001110011 simhash值的相等判断如下：
海明距离阈值默认设置为3，则isEqual结果为：0
海明距离阈值默认设置为5，则isEqual结果为：1

详情请看 example/demo.cpp

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