ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Publications Copernicus
Articles | Volume II-5/W2
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-5/W2, 229–234, 2013
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-5/W2, 229–234, 2013

  16 Oct 2013

16 Oct 2013

Automatic registration of optical imagery with 3d lidar data using local combined mutual information

E. G. Parmehr1,2, C. S. Fraser1,2, C. Zhang1,3, and J. Leach2 E. G. Parmehr et al.
  • 1Cooperative Research Centre for Spatial Information, VIC 3053, Australia
  • 2Department of Infrastructure Engineering, University of Melbourne, VIC 3010, Australia
  • 3School of Mathematical and Spatial Sciences, RMIT University, VIC 3000, Australia

Keywords: Registration, Optical Imagery, LiDAR Point Cloud

Abstract. Automatic registration of multi-sensor data is a basic step in data fusion for photogrammetric and remote sensing applications. The effectiveness of intensity-based methods such as Mutual Information (MI) for automated registration of multi-sensor image has been previously reported for medical and remote sensing applications. In this paper, a new multivariable MI approach that exploits complementary information of inherently registered LiDAR DSM and intensity data to improve the robustness of registering optical imagery and LiDAR point cloud, is presented. LiDAR DSM and intensity information has been utilised in measuring the similarity of LiDAR and optical imagery via the Combined MI. An effective histogramming technique is adopted to facilitate estimation of a 3D probability density function (pdf). In addition, a local similarity measure is introduced to decrease the complexity of optimisation at higher dimensions and computation cost. Therefore, the reliability of registration is improved due to the use of redundant observations of similarity. The performance of the proposed method for registration of satellite and aerial images with LiDAR data in urban and rural areas is experimentally evaluated and the results obtained are discussed.