Avrahami, Y., Raizman, Y. and Doytsher, Y. (2005) Extraction of 3D Spatial Polygons Based on the Overlapping Criterion for Roof Extraction from Aerial Images. Joint Workshop of ISPRS and the German Association for Pattern Recognition: Object Extraction for 3D City Models, Road Databases and Traffic Monitoring-Concepts, Algorithms, and Evaluation, Vienna, 29-30 August 2005.

has been cited by the following article:

• TITLE: Automatic Correction of DEM Surface Errors

  AUTHORS: Ahmed F. Elaksher

  KEYWORDS: Photogrammetry, DEM, Orthophoto, Planner Surfaces

  JOURNAL NAME: Journal of Geographic Information System, Vol.9 No.3, June 15, 2017

  ABSTRACT: The automation of extracting planner surfaces is a main field of research in digital photogrammetry. These surfaces are essential to generate three dimensional GIS databases. Surfaces are usually determined from either DEMs or images. Each dataset provides a different type of information. Thus, the combination of the two datasets should enhance the surface reconstruction process. This paper presents a new technique for generating 3D surfaces by combining both correlation-based DEMs and aerial images. The process starts by discriminating DEM points that represent planner surfaces using local statistics of neighboring elevations and intensities and point elevations. A segmented orthophoto is then used to group these points into different regions. The elevations of the points in each region are fed into a least squares adjustment model to compute the best-fit planner surface parameters. Refinement of surface borders is then performed using a region growing algorithm. The RMSE for five test sites showed a spatial accuracy of 5 - 8 cm.