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http://dx.doi.org/10.7780/kjrs.2004.20.4.261

Comparative Study of GDPA and Hough Transformation for Linear Feature Extraction using Space-borne Imagery  

Lee Kiwon (한성대학교 정보공학부)
Ryu Hee-Young (서울대학교 지구과학교육과)
Kwon Byung-Doo (서울대학교 지구과학교육과)
Publication Information
Korean Journal of Remote Sensing / v.20, no.4, 2004 , pp. 261-274 More about this Journal
Abstract
The feature extraction using remotely sensed imagery has been recognized one of the important tasks in remote sensing applications. As the high-resolution imagery are widely used to the engineering purposes, need of more accurate feature information also is increasing. Especially, in case of the automatic extraction of linear feature such as road using mid or low-resolution imagery, several techniques was developed and applied in the mean time. But quantitatively comparative analysis of techniques and case studies for high-resolution imagery is rare. In this study, we implemented a computer program to perform and compare GDPA (Gradient Direction Profile Analysis) algorithm and Hough transformation. Also the results of applying two techniques to some images were compared with road centerline layers and boundary layers of digital map and presented. For quantitative comparison, the ranking method using commission error and omission error was used. As results, Hough transform had high accuracy over 20% on the average. As for execution speed, GDPA shows main advantage over Hough transform. But the accuracy was not remarkable difference between GDPA and Hough transform, when the noise removal was app]ied to the result of GDPA. In conclusion, it is expected that GDPA have more advantage than Hough transform in the application side.
Keywords
Linear Feature; GDPA; Hough Transformation; High-resolution Imagery; Accuracy Assessment;
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