Applying OLAP Pre-Aggregation Techniques to ... - Jacobs University
Applying OLAP Pre-Aggregation Techniques to ... - Jacobs University
Applying OLAP Pre-Aggregation Techniques to ... - Jacobs University
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List of Figures<br />
2.1 3D Array . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16<br />
2.2 Map Algebra Functions . . . . . . . . . . . . . . . . . . . . . . . . . 17<br />
2.3 Image Tiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />
2.4 Image Pyramids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20<br />
2.5 Nearest Neighbor, Bilinear and Cubic Interpolation Methods . . . . . 22<br />
2.6 3D Scaling Operations on Time-Series Imagery Datasets . . . . . . . 24<br />
2.7 <strong>OLAP</strong> Data Cube . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26<br />
2.8 Typical <strong>OLAP</strong> Cube Operations . . . . . . . . . . . . . . . . . . . . 27<br />
2.9 <strong>OLAP</strong> Approaches: M<strong>OLAP</strong>, R<strong>OLAP</strong>, and H<strong>OLAP</strong> . . . . . . . . . . 27<br />
2.10 M<strong>OLAP</strong> S<strong>to</strong>rage Scheme . . . . . . . . . . . . . . . . . . . . . . . . 28<br />
2.11 R<strong>OLAP</strong> S<strong>to</strong>rage Scheme . . . . . . . . . . . . . . . . . . . . . . . . 29<br />
2.12 Typical Query as Expressed in R<strong>OLAP</strong> and M<strong>OLAP</strong> Systems . . . . 29<br />
2.13 Star Model of a Spatial Warehouse . . . . . . . . . . . . . . . . . . . 32<br />
2.14 Comparison of Roll-Up and Scaling Operations . . . . . . . . . . . . 34<br />
3.1 Reduction of Contrast in the Green Channel of an RGB Image . . . . 40<br />
3.2 Highlighted Infrared Areas of an NRG Image . . . . . . . . . . . . . 41<br />
3.3 Cells of Rasters A and B with Equal Values . . . . . . . . . . . . . . 42<br />
3.4 Re-Classification of the Cell Values of a Raster Image . . . . . . . . . 43<br />
3.5 Computation of a Proximity Operation . . . . . . . . . . . . . . . . . 44<br />
3.6 Computation of an Overlay Operation . . . . . . . . . . . . . . . . . 45<br />
3.7 Computation of an Overlay Operation Considering Values Greater<br />
than Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46<br />
3.8 Calculation of the Total Sum of Cell Values in a Raster . . . . . . . . 47<br />
3.9 Result of an Average Aggregate Operation . . . . . . . . . . . . . . . 48<br />
3.10 Result of a Maximum Aggregate Operation . . . . . . . . . . . . . . 48<br />
3.11 Result of a Minimum Aggregate Operation . . . . . . . . . . . . . . 49<br />
3.12 Computation of the His<strong>to</strong>gram for a Raster Image . . . . . . . . . . . 50<br />
3.13 Computation of the Diversity for a Raster Image . . . . . . . . . . . . 50<br />
3.14 Computation of a Majority Operation for a Raster Image . . . . . . . 51<br />
3.15 Computation of the Variance for a Raster Image . . . . . . . . . . . . 52<br />
3.16 Computation of the Standard Deviation for a Raster Image . . . . . . 52<br />
3.17 Computation of Median for a Raster Image . . . . . . . . . . . . . . 54<br />
3.18 Computation of a Top-k Operation for a Raster Image . . . . . . . . . 54<br />
3.19 Computation of a Translation Operation for a Raster Image . . . . . . 56<br />
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