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Statistical segmentation and structural recognition for floor plan interpretation

Lluís-Pere de las Heras; Sheraz Ahmed; Marcus Liwicki; Ernest Valveny; Gemma Sánchez
In: International Journal on Document Analysis and Recognition (IJDAR), Vol. 16, No. 4, Pages 1-17, Springer, Berlin Heidelberg, 2013.


A generic method for floor plan analysis and interpretation is presented in this article. The method, which is mainly inspired by the way engineers draw and interpret floor plans, applies two recognition steps in a bottom-up manner. First, basic building blocks, i.e., walls, doors, and windows are detected using a statistical patch-based segmentation approach. Second, a graph is generated, and structural pattern recognition techniques are applied to further locate the main entities, i.e., rooms of the building. The proposed approach is able to analyze any type of floor plan regardless of the notation used. We have evaluated our method on different publicly available datasets of real architectural floor plans with different notations. The overall detection and recognition accuracy is about 95 %, which is significantly better than any other state-of-the-art method. Our approach is generic enough such that it could be easily adopted to the recognition and interpretation of any other printed machine-generated structured documents.