Cc. Chang et Cf. Lee, SPATIAL MATCH RETRIEVAL BASED ON DIRECTION SIGNATURES USING MULTIPLE KEY HASHING SCHEME, International journal of intelligent systems, 12(10), 1997, pp. 777-788
Citations number
11
Categorie Soggetti
System Science","Controlo Theory & Cybernetics","Computer Sciences, Special Topics","Computer Science Artificial Intelligence
The spatial relationships among pictorial objects are important spatia
l characteristics in image database systems. Based on the concept of 9
-DLT representation, we propose a new method for effective storage uti
lization and picture retrieval. First, we transform a symbolic picture
into a set of triples associated with pairwise spatial relationships
among objects. Then, an associated normalized signature record with ni
ne attributes is specified. Finally, each normalized record of this im
age database can be well allocated by using our proposed multiple key
hashing scheme and can be fast accessed for spatial match retrieval. T
he performance formula for spatial picture retrieval is presented and
the theoretically optimal solutions to the bit lengths of all the attr
ibutes are derived in certain case. Also, we give a systematic method
to solve the feasible bit lengths for the attributes based on the meth
od proposed by Chang. (C) 1997 John Wiley & Sons, Inc.