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EXTRACTION OF ROOF LINES FROM HIGH-RESOLUTION IMAGES BY A GROUPING METHOD

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Figure 1. Geometric elements for defining the relative length, proximity, and orientation energy terms
Figure 2. Test 1. (a) Projected ALS-derived roof polyhedron;
Figure 3. Test 2. (a) Projected roof; (b) extracted lines of the image; and (c) results of the energy function optimization Figure 3 shows the second test building

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