Data processing: measuring – calibrating – or testing – Measurement system – Measured signal processing
Patent
1998-05-29
2000-01-11
Assouad, Patrick
Data processing: measuring, calibrating, or testing
Measurement system
Measured signal processing
382176, 382180, 382203, G06K 934
Patent
active
060146141
ABSTRACT:
A method and mechanism for performing a spatial join between two sets of objects employs a two-pass primary filter. The objects are decomposed into variable-sized cells no larger than a predetermined cell size and stored in respective spatial indexes. The spatial indexes include a code for the variable-size cells of the object and a code for the fixed-size supercell of the variable-size cells. The first pass can be implemented as an equijoin filtering operation using the fixed-size cell codes corresponding to the predetermined cell size, and the second pass as a join operation using the variable-size cell codes at smaller cell sizes.
REFERENCES:
patent: 5542073 (1996-07-01), Schiefer et al.
patent: 5652882 (1997-07-01), Doktor
patent: 5751852 (1998-05-01), Marimont et al.
patent: 5774579 (1998-06-01), Wang et al.
patent: 5818962 (1998-10-01), Mizukami
patent: 5884320 (1999-03-01), Agrawal et al.
H. Samet et al., "Recent Developments in Linear Quadtree-Based Geographic Information Systems", Image and Vision Computing, vol. 5, No. 3, Aug. 1987, pp. 187-197.
Michael A. Bauer, "Note: Set Operations on Linear Quadtrees", Computer Vision, Graphics, and Image Processing, vol. 29, No. 2, Feb. 1985, pp. 248-258.
Shu-Xiang Li et al., "The Quadcode and Its Arithmetic", Communications of the ACM, vol. 30, No. 7, Jul. 1987, pp. 621-626.
Marloes L. P. van Lierop, "Geometrical Transformations on Pictures Represented by Leafcodes", Computer Vision, Graphics, and Image Processing, vol. 33, No. 1, Jan. 1986, pp. 81-98.
S. K. Bhaskar, "Parallel Processing of Regions Represented by Linear Quadtrees", Computer Vision, Graphics, and Image Processing, vol. 42, No. 3, Jun. 1988, pp. 371-380.
Peng Gao et al., "Space Efficient Hierarchical Structures: Relatively Addressed Compact Quadtress for GISs", Image and Vision Computing, vol. 7, No. 3, Aug. 1989, pp. 173-177.
F.C. Holroyd et al., "Efficient Linear Quadtree Construction Algorithm", Image and Vision Computing, vol. 8, Aug. 1990, pp. 218-224.
Sotirios G. Ziavras et al., "Improved Algorithms for Translation of Pictures Represented by Leaf Codes", Image and Vision Computing, vol. 6, No. 1, Feb. 1998, pp. 13-20.
Shu-Xiang Li et al., "Adjacency Detection Using Quadcodes", Communications of the ACM, Jul. 1987, vol. 30, No. 7, pp. 627-631.
Hanan Samet, "Region Representation: Quadtrees from Boundary Codes", Communications of the ACM, vol. 23, No. 3, Mar. 1980, pp. 163-170.
Hanan Samet, "Note Region Representation: Quadtrees from Binary Arrays", Computer Graphics and Image Processing, vol. 13, No. 1, May 1980, pp. 88-93.
S.B.M. Bell et al., "Spatially Referenced Methods of Processing Raster and Vector Data", Image and Vision Computing, vol. 1, No. 4, Nov. 1983, pp. 211-220.
S. B. M. Bell et al., "Tesseral Amalgamators and Hierarchical Tessellations", Image and Vision Computing, vol. 9, No. 5, Oct. 1991, pp. 313-328.
Takashi Matsuyama et al., "A File Organization for Geographic Information Systems Based on Spatial Proximity", Computer Vision, Graphics, and Image Processing, vol. 26, No. 3, Jun. 1984, pp. 303-318.
Randal C. Nelson et al., "A Consistent Hierarchical Representation for Vector Data", Compute Graphics, vol. 20, No. 4, Aug. 1986, pp. 197-206.
D. J. Abel et al., A B(+) Tree Structure for Large Quadtrees, Computer Vision, Graphics, and Image Processing, vol. 37, No. 1, Jul. 1984, pp. 19-31.
D. J. Abel et al., "A Data Structure and Algorithm Based on a Linear Key for a Rectangle Retrieval Problem", Computer Vision, Graphics, and Image Processing, vol. 24, No. 1, Oct. 1983, pp. 1-13.
Fangju Wang, "Relational-Linear Quadtree Approach for Two-Dimensional Spatial Representation and Manipulation", IEEE Transactions on Knowledge and Data Engineering, vol. 3, No. 1, Mar. 1991, pp. 118-122.
Esen A. Ozkarahan et al., "Join Strategies Using Data Space Partitioning", New Generation Computing, vol. 6, No. 1, 1988, pp. 19-39.
Thomas Brinkhoff et al., "Approximations for a Multi-Step Processing of Spatial Joins", IGIS, 1994, pp. 25-34.
Ming-Ling Lo et al., "Spatial Joins Using Seeded Trees", SIGMOD Conferences 1994, pp. 209-220.
Ming-Ling Lo et al., "Generating Seeded Trees from Data Sets", SSD 1995, pp. 328-347.
Jignesh M. Patel et al., "Partition Based Spatial-Merge Join", SIGMOD Conference 1996, pp. 259-270.
Ming-Ling Lo et al., "Spatial Hash-Joins", SIGMOD Conference 1996, pp. 247-258.
Nick Koudas et al., "Size Separation Spatial Join", SIGMOD Conference 1997, pp. 324-335.
Xiaofang Zhou et al., "Data Partitioning for Parallel Spatial Join Processing", Advances in Spatial Databases (SSD) 1997, pp. 178-196.
Agarwal Nipun
Herring John
Vretanos Panagiotis
Assouad Patrick
Oracle Corporation
Vo Hien
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