Morphological façade image analysis for building modeling

Abstract : In this paper, we describe a novel method for morphological fa ̧cade analysis. The analysis consists of two parts: fa ̧cade division and localization of windows. The fa ̧cade division is based on the fa ̧cade alignment hypothesis. We accumulate directional color gradients and we analyze the generated pro- file. Our approach introduces several morphological filters to augment the robustness to problems such as: low perspective distortion, textured images and small obstacles in images. The localization of windows uses the profiles and the fa ̧cade divi- sion information.