Near-duplicate document detection for web crawling
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United States of America Patent
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Oct 1, 2013
Grant Date -
N/A
app pub date -
Mar 16, 2012
filing date -
Mar 31, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A system generates a hash value for a fetched document and compares the hash value with a set of stored hash values to identify ones of the stored hash values with a sequence of bit positions, less than all of the bit positions, that match a corresponding sequence of bit positions of the hash value. The system also determines whether any of the identified hash values are substantially similar to the hash value and identify the fetched document as a near-duplicate of another document when one of the identified hash values is substantially similar to the hash value.
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