Digital terrain from a two-step segmentation and outlier-based algorithm
We present a novel ground filter for remotely sensed height data. Our filter has two phases: the first phase segments the DSM with a slope threshold and uses gradient direction to identify candidate ground segments; the second phase fits surfaces to the candidate ground points and removes outliers....
| Main Authors: | , , , , |
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| Format: | Conference Paper |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/61526 |
| _version_ | 1848760691208486912 |
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| author | Hingee, Kassel Caccetta, P. Caccetta, Louis Wu, X. Devereaux, D. |
| author_facet | Hingee, Kassel Caccetta, P. Caccetta, Louis Wu, X. Devereaux, D. |
| author_sort | Hingee, Kassel |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present a novel ground filter for remotely sensed height data. Our filter has two phases: the first phase segments the DSM with a slope threshold and uses gradient direction to identify candidate ground segments; the second phase fits surfaces to the candidate ground points and removes outliers. Digital terrain is obtained by a surface fit to the final set of ground points. We tested the new algorithm on digital surface models (DSMs) for a 9600km2 region around Perth, Australia. This region contains a large mix of land uses (urban, grassland, native forest and plantation forest) and includes both a sandy coastal plain and a hillier region (elevations up to 0.5km). The DSMs are captured annually at 0:2m resolution using aerial stereo photography, resulting in 1:2TB of input data per annum. Overall accuracy of the filter was estimated to be 89:6% and on a small semi-rural subset our algorithm was found to have 40% fewer errors compared to Inpho’s Match-T algorithm. |
| first_indexed | 2025-11-14T10:19:48Z |
| format | Conference Paper |
| id | curtin-20.500.11937-61526 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:19:48Z |
| publishDate | 2016 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-615262018-08-06T01:12:39Z Digital terrain from a two-step segmentation and outlier-based algorithm Hingee, Kassel Caccetta, P. Caccetta, Louis Wu, X. Devereaux, D. We present a novel ground filter for remotely sensed height data. Our filter has two phases: the first phase segments the DSM with a slope threshold and uses gradient direction to identify candidate ground segments; the second phase fits surfaces to the candidate ground points and removes outliers. Digital terrain is obtained by a surface fit to the final set of ground points. We tested the new algorithm on digital surface models (DSMs) for a 9600km2 region around Perth, Australia. This region contains a large mix of land uses (urban, grassland, native forest and plantation forest) and includes both a sandy coastal plain and a hillier region (elevations up to 0.5km). The DSMs are captured annually at 0:2m resolution using aerial stereo photography, resulting in 1:2TB of input data per annum. Overall accuracy of the filter was estimated to be 89:6% and on a small semi-rural subset our algorithm was found to have 40% fewer errors compared to Inpho’s Match-T algorithm. 2016 Conference Paper http://hdl.handle.net/20.500.11937/61526 10.5194/isprs-archives-XLI-B3-233-2016 http://creativecommons.org/licenses/by/3.0/ fulltext |
| spellingShingle | Hingee, Kassel Caccetta, P. Caccetta, Louis Wu, X. Devereaux, D. Digital terrain from a two-step segmentation and outlier-based algorithm |
| title | Digital terrain from a two-step segmentation and outlier-based algorithm |
| title_full | Digital terrain from a two-step segmentation and outlier-based algorithm |
| title_fullStr | Digital terrain from a two-step segmentation and outlier-based algorithm |
| title_full_unstemmed | Digital terrain from a two-step segmentation and outlier-based algorithm |
| title_short | Digital terrain from a two-step segmentation and outlier-based algorithm |
| title_sort | digital terrain from a two-step segmentation and outlier-based algorithm |
| url | http://hdl.handle.net/20.500.11937/61526 |