1. A NEW ROAD EXTRACTION APPROACH FOR LOW-FREQUENCY SAR IMAGES BASED ON ROAD APPURTENANCE DETECTION Qian Song, Yu-min Wang, Yun-fei Shi, Tian Jin National University Of Defense Technology Changsha, China songqian@nudt.edu.cn

2. Road Extraction Feature Fusion to Improve Road Network Extraction in High-Resolution SAR Images Gianni Lisini and Paolo Gamba of University of Pavia, etc. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, VOL. 3, NO. 2, APRIL 2006 from A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

3. Object and Category Conventional Road Extraction Approach is targeted at Conventional Road Extraction Approach is targeted at Optical Images Optical Images Hyperspectral Images Hyperspectral Images High-frequency SAR Images High-frequency SAR Images … and can be categorized into … and can be categorized into Line detection Line detection Shape inference Shape inference A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

4. Line Detection Approach Roads can be approxi- mated as lines ， and can be extracted by line/ridge detection algorithms. Roads can be approxi- mated as lines ， and can be extracted by line/ridge detection algorithms. A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

5. Shape Inference Approach Roads occupy regular shapes ， and can be extracted by edge detection and shape recognition algorithms. Roads occupy regular shapes ， and can be extracted by edge detection and shape recognition algorithms. A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

6. An Essential Precondition The characteristics of roads and background are distinguishable enough. The characteristics of roads and background are distinguishable enough. A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

7. The Low-frequency SAR Case A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc. Data from a flight experiment of an airborne UWB SAR system develop- ed by NUDT, in Summer 2010

8. The Low-frequency SAR Case A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc. The histograms of roads and background (with strong clutters suppressed)

9. The Low-frequency SAR Case clutter attenuation A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

10. The Low-frequency SAR Case A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

11. Alternative Way Road Appurtenances A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

12. Features Of Appurtenances Consistent Scattering Characteristics Consistent Scattering Characteristics of the same material of the same material of the same structure of the same structure often in the same orientation often in the same orientation Regular Geometrical Layouts Regular Geometrical Layouts at nearly fixed intervals at nearly fixed intervals with predictable patterns with predictable patterns A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

13. Algorithm Flow A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

14. The Original Image A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

15. ROI Extraction A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

16. After Enhanced Lee Filtering A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

17. After Morphologic Filtering A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

18. After Clustering A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

19. ROIs of targets and clutters Features Chosen: Features Chosen: Area Area compactness compactness Eccentricity Eccentricity Second order moment Second order moment Convexity Convexity A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

20. ROI Discrimi- nation A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

21. HS-SVM An effective One-class classifier An effective One-class classifier A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc. T. Jin, Z. Zhou, “Ultrawideband synthetic aperture radar landmine detection”, IEEE Trans. on GRS, pp. 3561- 3573, 2007.

22. After Classification A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

23. ROI Discrimi- nation A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

24. Geometrical Features Parallelism Parallelism Constant width and Intervals Constant width and Intervals The heading angle changing slowly and continuously The heading angle changing slowly and continuously Predictable Junction patterns Predictable Junction patterns A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

25. After Geometrical Discrimination A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

26. Road Extraction A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

27. Final Result A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc.

28. Conclusions and Future works A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， A New Road Extraction Approach for Low-frequency SAR Images Based on Road Appurtenance detection ， Qian Song, etc. Conclusion Conclusion Our approach of road extraction based on appurtenance detection shows its effectiveness, when: Our approach of road extraction based on appurtenance detection shows its effectiveness, when: the roads are foliage covered the roads are foliage covered there are some types of appurtenances there are some types of appurtenances Low-frequency SAR is adopted for its penetrating capability Low-frequency SAR is adopted for its penetrating capability Reasonable selection and exploitation of scattering and geometrical features are key to this approach Reasonable selection and exploitation of scattering and geometrical features are key to this approach Future works Future works A integration frameworks of conventional and appurtenance-detection based approach A integration frameworks of conventional and appurtenance-detection based approach More efficient algorithms More efficient algorithms