In the last years, several robots for building façade cleaning have been designed and some prototypes have been developed. However, most of these robotics systems are too expensive to be introduced in the market or are only able to cope with very simple completely flat glass façades. Funded by the European Commission, a consortium formed by several European enterprises and research institutions...

In this paper, we describe an automatic method for segmentation of building façade images. First, individual façades are isolated from general city block images. This step is based on accumulation of directional color gradients, assuming that façade structures are aligned. Then sky region is detected based on segmentation approach and color marker extraction. Finally, the images are split in fl...

This paper discusses the automatic texturing of building facades from thermal infrared image sequences. A fully automatic method is presented to refine GPS based positions using a relative orientation of the image sequence and preknowledge of a given building model in a bundle adjustment process. The resulting refined orientation parameters are used to project the infrared images of the sequenc...

In this paper we propose an approach for building façade interpretation ranging from uncalibrated images of an image sequence to the extraction of objects such as windows. The approach comprises several novel features, such as determination of the façade planes by robust least squares matching, learning of implicit shape models for objects, particularly windows, and a determination of the latte...

By means of airborne multiple camera imaging system, we can acquire vertical and oblique aerial images (VAI and OAI) at the same time. In addition to the reduction of data cost, the OAI can also strengthen the imaging geometry during aerial triangulation and be applied on automatic façade texture mapping. With the development of image matching technique, instead of airborne laser scanning (ALS)...

The generation of photo-realistic city model is an important task for many geospatial applications, such as 3D GIS, urban planning, virtual city tourism, car navigation, real estate, etc. The purpose of this research is to automatically generate façade texture from aerial oblique imagery. The developed algorithm can be applied to any oblique imagery taken from the air, such as UAV, airplane, or...

Abstract. Point clouds are widely regarded as one of the best dataset types for urban mapping purposes. Hence, point cloud datasets commonly investigated benchmark various interpretation methods. Yet, few researchers have addressed use benchmarks façade segmentation. Robust segmentation is becoming a key factor in applications ranging from simulating autonomous driving functions to preserving c...

The use of 3D city models has been introduced into a variety of fields from urban planning to disaster management. These models are no longer regarded as ‘simple’ visual representations of the real world; they act as an information space and as semantic models for urban environments as they represent much more than the visual appearance of the real world. For users of these ‘rich’ models the Le...

The paper presents an approach to efficiently increase the geometric detail of complex building facades by terrestrial laser scanning (TLS). Such applications are frequently required for documentation and presentation of architectural heritage. The modeling of the building geometry is based on a coarse to fine approach. Thus, an approximate 3D building model like it is typically available from ...