Institutional Repository
Technical University of Crete
Technical University of Crete
EN
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EL
| URI | http://purl.tuc.gr/dl/dias/C062872A-3DFD-4A82-A35D-08D34FDCD9CE | - |
| Identifier | https://doi.org/10.3390/s19051123 | - |
| Identifier | https://www.mdpi.com/1424-8220/19/5/1123 | - |
| Language | en | - |
| Extent | 18 pages | en |
| Title | A SIFT-based DEM extraction approach using GEOEYE-1 satellite stereo pairs | en |
| Creator | Daliakopoulos Ioannis | en |
| Creator | Δαλιακοπουλος Ιωαννης | el |
| Creator | Tsanis Ioannis | en |
| Creator | Τσανης Ιωαννης | el |
| Publisher | MDPI | en |
| Content Summary | A module for Very High Resolution (VHR) satellite stereo-pair imagery processing and Digital Elevation Model (DEM) extraction is presented. A large file size of VHR satellite imagery is handled using the parallel processing of cascading image tiles. The Scale-Invariant Feature Transform (SIFT) algorithm detects potentially tentative feature matches, and the resulting feature pairs are filtered using a variable distance threshold RANdom SAmple Consensus (RANSAC) algorithm. Finally, point cloud ground coordinates for DEM generation are extracted from the homologous pairs. The criteria of average point spacing irregularity is introduced to assess the effective resolution of the produced DEMs. The module is tested with a 0.5 m × 0.5 m Geoeye-1 stereo pair over the island of Crete, Greece. Sensitivity analysis determines the optimum module parameterization. The resulting 1.5-m DEM has superior detail over reference DEMs, and results in a Root Mean Square Error (RMSE) of about 1 m compared to ground truth measurements. | en |
| Type of Item | Peer-Reviewed Journal Publication | en |
| Type of Item | Δημοσίευση σε Περιοδικό με Κριτές | el |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2020-07-20 | - |
| Date of Publication | 2019 | - |
| Subject | Algorithm | en |
| Subject | Digital elevation model | en |
| Subject | RANSAC | en |
| Subject | Satellite stereo pair | en |
| Subject | SIFT | en |
| Bibliographic Citation | I.N. Daliakopoulos and I.K. Tsanis, "A SIFT-based DEM extraction approach using GEOEYE-1 satellite stereo pairs," Sensors, vol. 19, no. 5, Mar. 2019. doi: 10.3390/s19051123 | en |
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