System of updating an index file of frame sequences so that it indexes non-overlapping motion image frame sequences
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United States of America Patent
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Jun 27, 1995
Grant Date -
N/A
app pub date -
Mar 16, 1993
filing date -
Mar 24, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the creation of the index file, one index record is allocated to each set consisting of one retrieval key and the initial and final positions in the motion image of one frame to which the retrieval key is allocated, and information on this set is stored therein. In the query processing, for a query specified by a Boolean expression of retrieval keys, records whose keywords match any of the retrieval keys included in the query are retrieved from the index file. Thereafter, all the initial and final positions of the matching records are arranged along a time axis. For each of intervals defined by those positions, a truth table is created in which the allocation of the retrieval keys included in the query is expressed by truth values, and the logical condition of the query is evaluated based on the table.
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