DEVELOPMENT OF A NEW LOW-COST INDOOR MAPPING SYSTEM – SYSTEM DESIGN, SYSTEM CALIBRATION AND FIRST RESULTS
For mapping of building interiors various 2D and 3D indoor surveying systems are available today. These systems essentially differ from each other by price and accuracy as well as by the effort required for fieldwork and post-processing. The Laboratory for Photogrammetry & Laser Scanning of Ha...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-06-01
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| 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/XLI-B5/55/2016/isprs-archives-XLI-B5-55-2016.pdf |
| Summary: | For mapping of building interiors various 2D and 3D indoor surveying systems are available today. These systems essentially differ
from each other by price and accuracy as well as by the effort required for fieldwork and post-processing. The Laboratory for
Photogrammetry & Laser Scanning of HafenCity University (HCU) Hamburg has developed, as part of an industrial project, a lowcost
indoor mapping system, which enables systematic inventory mapping of interior facilities with low staffing requirements and
reduced, measurable expenditure of time and effort. The modelling and evaluation of the recorded data take place later in the office.
The indoor mapping system of HCU Hamburg consists of the following components: laser range finder, panorama head (pan-tilt-unit),
single-board computer (Raspberry Pi) with digital camera and battery power supply. The camera is pre-calibrated in a photogrammetric
test field under laboratory conditions. However, remaining systematic image errors are corrected simultaneously within the generation
of the panorama image. Due to cost reasons the camera and laser range finder are not coaxially arranged on the panorama head.
Therefore, eccentricity and alignment of the laser range finder against the camera must be determined in a system calibration. For the
verification of the system accuracy and the system calibration, the laser points were determined from measurements with total stations.
The differences to the reference were 4-5mm for individual coordinates. |
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| ISSN: | 1682-1750 2194-9034 |