| Abstract: | Remote sensing techniques have been shown effective for large-scale damage surveys after a hazardous event in both near real-time or post-event analyses. The paper aims to compare accuracy of common imaging processing techniques to detect tornado damage tracks from Landsat TM data. We employed the direct change detection approach using two sets of images acquired before and after the tornado event to produce a principal component composite images and a set of image difference bands. Techniques in the comparison include supervised classification, unsupervised classification, and objectoriented classification approach with a nearest neighbor classifier. Accuracy assessment is based on Kappa coefficient calculated from error matrices which cross tabulate correctly identified cells on the TM image and commission and omission errors in the result. Overall, the Object-oriented Approach exhibits the highest degree of accuracy in tornado damage detection. PCA and Image Differencing methods show comparable outcomes. While selected PCs can improve detection accuracy 5 to 10%, the Object-oriented Approach performs significantly better with 15-20% higher accuracy than the other two techniques. ?? 2008 by MDPI. |
| Genre: | Article |
| ProdID: | 70033296 |
| Citation Author: | Myint, S. W.; Yuan, M.; Cerveny, R. S.; Giri, C. P. |
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| Citation End Page: | 1156 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Sensors |
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| Citation Number Of Pages: | 29 |
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| Citation Search Results Text: | Comparison of remote sensing image processing techniques to identify tornado damage areas from Landsat TM data; 2008; Article; Journal; Sensors; Myint, S. W.; Yuan, M.; Cerveny, R. S.; Giri, C. P. |
| Citation Start Page: | 1128 |
| Citation Volume: | 8 |
| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Comparison of remote sensing image processing techniques to identify tornado damage areas from Landsat TM data; 2008; Article; Journal; Sensors; Myint, S. W.; Yuan, M.; Cerveny, R. S.; Giri, C. P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 2008 00:00 -0600 |
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