Texture mapping of 3D building models with oblique direct geo-referenced airborne IRimage sequences

Infrared (IR)-radiation of buildings can be captured by thermal imagedata. Nowadays, thermal images of different parts of buildings acquired in various scales are analysed, however conducted analysisconcern mainly the radiometric characteristics, avoiding dealingwith the geometry of the images. Aim of our work is the automatedtexture mapping of existing 3D building models with images recorded by IR cameras. In this way, 2D images are connected witha 3D GIS database and can be further analysed together with the information about the geometry of objects. The extraction of the frontfacades textures of our test area was already obtained using the terrestrial images acquired from the mobile platform. Howeverthose image sequences are restricted to the facades at the streetsites. Roof structures or backyards cannot be recorded in this way.Oblique images taken from the helicopter are expected to providea sufficient complement of the missing data. The flight path was recordedby an inertial measurement unit (IMU) and GPS. In order to utilize the INS/GPS data, first the IMU misalignment with respectto the camera axis has to be corrected. Then the texture mapping is performed without any additional refinement of camera position.The evaluation of obtained textures is performed andsome additional methods for their improvement are proposed.     «

Infrared (IR)-radiation of buildings can be captured by thermal imagedata. Nowadays, thermal images of different parts of buildings acquired in various scales are analysed, however conducted analysisconcern mainly the radiometric characteristics, avoiding dealingwith the geometry of the images. Aim of our work is the automatedtexture mapping of existing 3D building models with images recorded by IR cameras. In this way, 2D images are connected witha 3D GIS database and can be further analysed to...     »