New Methodologies for True Orthophoto Generation

Orthophoto production aims to eliminate sensor tilt and terrain relief effects from captured perspective imagery. Uniform scale and an absence of relief displacement in orthophotos make them an important component of GIS databases, where a user can directly determine geographic locations, measure distances, compute areas, and derive other useful information about the area in question. Differential rectification (DR) has been traditionally used for orthophoto generation. For large scale imagery over urban areas, DR produces serious artifacts in the form of double mapped areas at object space locations with sudden relief variations. Such artifacts are removed through true orthophoto generation methodologies, based on identification of occluded portions of the object space in the involved imagery. Existing methodologies suffer from several problems such as their sensitivity to the sampling interval of the digital surface model as it relates to the ground sampling distance of the imaging sensor. Also, current methodologies rely on availability of a digital building model, which requires an additional and expensive pre-processing. In this paper, new methodologies are presented for true orthophoto generation while circumventing problems associated with existing techniques. The feasibility and performance of the new techniques are verified through experimental results with simulated and actual data.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00991112
• Authors:
  • Habib, Ayman F
  • Kim, Eui-Myoung
  • Kim, Chang-Jae
• Publication Date: 2007-1

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References;
• Pagination: pp 25-36
• Serial:
  • Photogrammetric Engineering and Remote Sensing
  • Volume: 73
  • Issue Number: 1
  • Publisher: American Society for Photogrammetry and Remote Sensing
  • ISSN: 0099-1112

Subject/Index Terms

• TRT Terms: Geographic information systems; Highway engineering; Image analysis; Mapping; Orthophotographs; Photogrammetry; Remote sensing; Terrain evaluation
• Uncontrolled Terms: Geospatial data
• Subject Areas: Design; Highways; Planning and Forecasting; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 01045087
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 30 2007 7:01AM