A UAV-BASED LOW-COST STEREO CAMERA SYSTEM FOR ARCHAEOLOGICAL SURVEYS – EXPERIENCES FROM DOLICHE (TURKEY)
The use of Unmanned Aerial Vehicles (UAVs) for surveying archaeological sites is becoming more and more common due to their advantages in rapidity of data acquisition, cost-efficiency and flexibility. One possible usage is the documentation and visualization of historic geo-structures and -objects...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2013-08-01
|
| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-1-W2/195/2013/isprsarchives-XL-1-W2-195-2013.pdf |
| Summary: | The use of Unmanned Aerial Vehicles (UAVs) for surveying archaeological sites is becoming more and more common due to their
advantages in rapidity of data acquisition, cost-efficiency and flexibility. One possible usage is the documentation and visualization
of historic geo-structures and -objects using UAV-attached digital small frame cameras. These monoscopic cameras offer the
possibility to obtain close-range aerial photographs, but – under the condition that an accurate nadir-waypoint flight is not possible
due to choppy or windy weather conditions – at the same time implicate the problem that two single aerial images not always meet
the required overlap to use them for 3D photogrammetric purposes. In this paper, we present an attempt to replace the monoscopic
camera with a calibrated low-cost stereo camera that takes two pictures from a slightly different angle at the same time. Our results
show that such a geometrically predefined stereo image pair can be used for photogrammetric purposes e.g. the creation of digital
terrain models (DTMs) and orthophotos or the 3D extraction of single geo-objects. Because of the limited geometric photobase of
the applied stereo camera and the resulting base-height ratio the accuracy of the DTM however directly depends on the UAV flight
altitude. |
|---|---|
| ISSN: | 1682-1750 2194-9034 |