Azimuth Angle Estimation from Floor Plan Symbol and Main Daylight-facing Surface Prediction

Abstract

When extracting the features of a real estate property from its floor plan, if the floor plan includes a directional symbol, the orientation angle indicated by the symbol can be estimated, allowing for the prediction of orientation-related features. This paper proposes a method for estimating the orientation angle by detecting and analyzing the directional symbol in the floor plan. The method combines results from multiple image processing techniques. The paper also reports the verification results, achieving an average error of 3.68º. Additionally, it describes a method for predicting the property's main daylight-facing surfaces based on the estimated orientation angle and the window orientations extracted from the floor plan.