Investigation of uav systems and flight modes for photogrammetric applications

Eisenbeiss, Henri; Sauerbier, Martin

doi:10.1111/j.1477-9730.2011.00657.x

Cited by 168 publications

(97 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, recent developments in military, remote control, hobby and opensource hardware have made it viable and potentially transformative to consider new small (1-5 kg), relatively inexpensive unmanned aerial vehicle (UAV) platforms for mapping glacier dynamics. UAV platforms include, helicopters, multirotors, fixed wings and paragliders; they are typically small (1-5 kg) and relatively cheap, ranging in cost from USD 400 to 20 000 (Eisenbeiß, 2009;Eisenbeiss and Sauerbier, 2011;Friedli, 2013). These platforms may be operated by remote control, first person or GPS-enabled autopilot systems.…”

Section: Introductionmentioning

confidence: 99%

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Wigmore

Mark

2017

The Cryosphere

View full text Add to dashboard Cite

Abstract. The glaciers of the Cordillera Blanca, Peru, are rapidly retreating and thinning as a result of climate change, altering the timing, quantity and quality of water available to downstream users. Furthermore, increases in the number and size of proglacial lakes associated with these melting glaciers is increasing potential exposure to glacier lake outburst floods (GLOFs). Understanding how these glaciers are changing and their connection to proglacial lake systems is thus of critical importance. Most satellite data are too coarse for studying small mountain glaciers and are often affected by cloud cover, while traditional airborne photogrammetry and lidar are costly. Recent developments have made unmanned aerial vehicles (UAVs) a viable and potentially transformative method for studying glacier change at high spatial resolution, on demand and at relatively low cost.Using a custom designed hexacopter built for high-altitude (4000-6000 m a.s.l.) operation, we completed repeat aerial surveys (2014 and 2015) of the debris-covered Llaca Glacier tongue and proglacial lake system. High-resolution orthomosaics (5 cm) and digital elevation models (DEMs) (10 cm) were produced and their accuracy assessed. Analysis of these datasets reveals highly heterogeneous patterns of glacier change. The most rapid areas of ice loss were associated with exposed ice cliffs and meltwater ponds on the glacier surface. Considerable subsidence and low surface velocities were also measured on the sediments within the pro-glacial lake, indicating the presence of extensive regions of buried ice and continued connection to the glacier tongue. Only limited horizontal retreat of the glacier tongue was observed, indicating that measurements of changes in aerial extent alone are inadequate for monitoring changes in glacier ice quantity.

show abstract

Section: Introductionmentioning

confidence: 99%

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Wigmore

Mark

2017

The Cryosphere

View full text Add to dashboard Cite

show abstract

“…In addition, the Lumix GF3 RGB camera, another sensor will be used on the platform, enabling the generation of stereo images. See Aber et al (2010), Eisenbeiss et al (2005) and Eisenbeiss and Sauerbier (2011) for examples on DEM generation from stereo images collected by UAV. Furthermore, a combination of the data collected with different ground measurements such as hyper-spectral data or chlorophyll data is possible to obtain.…”

Section: Discussionmentioning

confidence: 99%

Introducing a Low-Cost Mini-Uav for Thermal- And Multispectral-Imaging

Bendig

Bolten

Bareth

2012

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

View full text Add to dashboard Cite

ABSTRACT:The trend to minimize electronic devices also accounts for Unmanned Airborne Vehicles (UAVs) as well as for sensor technologies and imaging devices. Consequently, it is not surprising that UAVs are already part of our daily life and the current pace of development will increase civil applications. A well known and already wide spread example is the so called flying video game based on Parrot's AR.Drone which is remotely controlled by an iPod, iPhone, or iPad (http://ardrone.parrot.com). The latter can be considered as a low-weight and low-cost Mini-UAV. In this contribution a Mini-UAV is considered to weigh less than 5 kg and is being able to carry 0.2 kg to 1.5 kg of sensor payload. While up to now Mini-UAVs like Parrot's AR.Drone are mainly equipped with RGB cameras for videotaping or imaging, the development of such carriage systems clearly also goes to multi-sensor platforms like the ones introduced for larger UAVs (5 to 20 kg) by Jaakkolla et al. (2010) for forestry applications or by Berni et al. (2009) for agricultural applications. The problem when designing a Mini-UAV for multi-sensor imaging is the limitation of payload of up to 1.5 kg and a total weight of the whole system below 5 kg. Consequently, the Mini-UAV without sensors but including navigation system and GPS sensors must weigh less than 3.5 kg. A Mini-UAV system with these characteristics is HiSystems' MK-Okto (www.mikrokopter.de). Total weight including battery without sensors is less than 2.5 kg. Payload of a MK-Okto is approx. 1 kg and maximum speed is around 30 km/h. The MK-Okto can be operated up to a wind speed of less than 19 km/h which corresponds to Beaufort scale number 3 for wind speed. In our study, the MK-Okto is equipped with a handheld low-weight NEC F30IS thermal imaging system. The F30IS which was developed for veterinary applications, covers 8 to 13 μm, weighs only 300 g, and is capturing the temperature range between -20 °C and 100 °C. Flying at a height of 100 m, the camera's image covers an area of approx. 50 by 40 m. The sensor's resolution is 160 x 120 pixel and the field of view is 28° (H) x 21° (V). According to the producer, absolute accuracy for temperature is ±1 °C and the thermal sensitivity is >0.1 K. Additionally, the MK-Okto is equipped with Tetracam's Mini MCA. The Mini MCA in our study is a four band multispectral imaging system. Total weight is 700 g and spectral characteristics can be modified by filters between 400 and 1000 nm. In this study, three bands with a width of 10 nm (green: 550 nm, red: 671 nm, NIR 1 : 800 nm) and one band of 20 nm width (NIR 2 : 950 nm) have been used. Even so the MK-Okto is able to carry both sensors at the same time, the imaging systems were used separately for this contribution. First results of a combined thermaland multispectral MK-Okto campaign in 2011 are presented and evaluated for a sugarbeet field experiment examining pathogens and drought stress.

show abstract

“…The 3D reconstruction pipeline processes an automated tie point extraction, a bundle adjustment for camera parameters derivation, a dense image matching for surface reconstruction and a subsequent ortho-images generation. Many other studies have been carried on (Bäumker & Przybilla, 2011;Eisenbeiss & Sauerbier, 2011;Küng et al, 2011;Haala & Rothermel, 2012;Fiorillo et al, 2013;Nocerino et al, 2013) and have demonstrated the potential of the UAVs in the survey field, ensuring precision and accuracy in operations in which data acquisition is made difficult because of both the extension of the study area and reasons of inaccessibility. These systems allow the record of detailed information faster than other acquisition systems such as the range-based ones.…”

Section: Related Work and Work Aimsmentioning

confidence: 99%

Evaluating the Potential of Imaging Rover For Automatic Point Cloud Generation

Cera

Campi

2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

View full text Add to dashboard Cite

ABSTRACT:The paper presents a phase of an on-going interdisciplinary research concerning the medieval site of Casertavecchia (Italy). The project aims to develop a multi-technique approach for the semantic -enriched 3D modeling starting from the automatic acquisition of several data. In particular, the paper reports the results of the first stage about the Cathedral square of the medieval village. The work is focused on evaluating the potential of an imaging rover for automatic point cloud generation. Each of survey techniques has its own advantages and disadvantages so the ideal approach is an integrated methodology in order to maximize single instrument performance. The experimentation was conducted on the Cathedral square of the ancient site

show abstract

Investigation of uav systems and flight modes for photogrammetric applications

Cited by 168 publications

References 11 publications

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

Introducing a Low-Cost Mini-Uav for Thermal- And Multispectral-Imaging

Evaluating the Potential of Imaging Rover For Automatic Point Cloud Generation

Contact Info

Product

Resources

About