User-Driven Geolocation of Untagged Desert Imagery Using Digital Elevation Models

摘要: We propose a system for user-aided visual localization of desert imagery without the use any metadata such as GPS readings, camera focal length, or field-of-view. The makes only publicly available digital elevation models (DEMs) to rapidly and accurately locate photographs in non-urban environments deserts. Our generates synthetic skyline views from DEM extracts stable concavity-based features these skylines form database. To localize queries, user manually traces on an input photograph. is automatically refined based this estimate, same are extracted. then apply variety geometrically constrained matching techniques efficiently match query database skyline, thereby localizing image. evaluate our using test set 44 ground-truthed images over 10, 000 km2 region interest show that many cases, queries can be localized with precision fine 100 m2.