Counting Bloom filter

A Counting Bloom filter is a generalized data structure of Bloom filter, that is used to test whether a count number of a given element is smaller than a given threshold when a sequence of elements is given. As a generalized form of Bloom filter, false positive matches are possible, but false negatives are not – in other words, a query returns either "possibly bigger or equal than the threshold" or "definitely smaller than the threshold".

Counting Bloom filter

A Counting Bloom filter is a generalized data structure of Bloom filter, that is used to test whether a count number of a given element is smaller than a given threshold when a sequence of elements is given. As a generalized form of Bloom filter, false positive matches are possible, but false negatives are not – in other words, a query returns either "possibly bigger or equal than the threshold" or "definitely smaller than the threshold".