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isprsannals II 4 W1 1 2013

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Figure 1. Rule parameters of a  Rule types
Figure 3.  Real floor plan and its grammar-based representation
Figure 4 illustrates the traces after correction and alignment to the building shell. The artificially reduced set of trace-based generated hallways is given as dotted polygons in Figure 5(a)
Figure 5.  2nd floor of university building. (a) hallways (dotted polygons) and rooms with door positions (small polygons) derived from traces, hypothesized hallways (red solid polygons); (b) complete model with hypothesized rooms; (c) ground truth

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