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test_git

test lsh 插入时,返回与该条数据相似的数据id的list 当插入数据的id小于0时,实际 不插入。相当于查询。只返回相似数据的id 假设有n个bands则分配n快cache,每个cache下面有若干bucket桶。

bands数量越大,每个bands内的数据量r越小,相当于匹配规则限制级别降低,返回的相似特征数量可能更多(相当于更精确),但是需要检索更多的数据。

汉明距离的LSH原理:https://www.jianshu.com/p/e6af33fd8e27

simhash实现原理:http://www.lanceyan.com/tech/arch/simhash_hamming_distance_similarity2-html.html

LSH实现原理较详细:https://blog.csdn.net/sinat_26917383/article/details/52451028

simhash用来意图搜图:https://blog.csdn.net/sinat_26917383/article/details/70287521

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