The influence of flight height and overlap on UAV imagery over featureless surfaces and constructing formulas predicting the geometrical accuracy

Elhadary, Ahmed; Rabah, Mostafa; Ghanim, Essam; Mohie, Rasha; Taha, Ahmed

doi:10.1080/20909977.2022.2057148

Cited by 14 publications

(11 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Forlani et al [ 49 ] showed that the accuracy and precision of the DSMs generated by UAV-SfM depend on several parameters, one of which is the overlap between strips. Also, some studies [ 71 , 72 ] have found that increasing the degree of overlap between images leads to an increase in geometric pressure in 3D models, but this is better when oblique images with nadir are integrated.…”

Section: Discussionmentioning

confidence: 99%

Low-cost tools for virtual reconstruction of traffic accident scenarios

Pérez,

Gonçalves,

Morillo Barragan

et al. 2024

Heliyon

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Low-cost tools for virtual reconstruction of traffic accident scenarios

Pérez,

Gonçalves,

Morillo Barragan

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…The results showed that as the altitude increases, the accuracy decreases reaching 3.2, 4.0, 7.1, 10.9 and 16.6 cm 3D RMSE for each altitude, respectively. The study [102] also analysed accuracies for different flight heights (140, 160, 180 and 200 m AGL). Results of 0.043, 0.049, 0.052 and 0.057 m were obtained respectively, showing as before that lower altitude translates into higher accuracies.…”

Section: Photograph Blocks Flight Methodsmentioning

confidence: 99%

Optimising UAV Data Acquisition and Processing for Photogrammetry: A Review

Pargieła

2023

GaEE

View full text Add to dashboard Cite

Unmanned aerial vehicles (UAVs) are used to acquire measurement data for an increasing number of applications. Photogrammetric studies based on UAV data, thanks to the significant development of computer vision techniques, photogrammetry, and equipment miniaturization, allow sufficient accuracy for many engineering and non-engineering applications to be achieved. In addition to accuracy, development time and cost of data acquisition and processing are also important issues. The aim of this paper is to present potential limitations in the use of UAVs to acquire measurement data and to present measurement and processing techniques affecting the optimisation of work both in terms of accuracy and economy. Issues related to the type of drones used (multi-rotor, fixed-wing), type of shutter in the camera (rolling shutter, global shutter ), camera calibration method (pre-calibration, self-calibration), georeferencing method (direct, indirect), technique of measuring the external images orientation parameters (RTK, PPK, PPP), flight design methods and the type of software used were analysed.

show abstract

“…The recommended overlaps between images are of the order of 80 to 90% for front overlap and 60 to 80% for side overlap (these values being adjusted according to the acquisition conditions, the 'texture' of the area, the precision required, etc. ; for example, [45][46][47]).…”

Section: Principle Of the Methodsmentioning

confidence: 99%

Low-Tech and Low-Cost System for High-Resolution Underwater RTK Photogrammetry in Coastal Shallow Waters

Jaud,

Delsol,

Urbina-Barreto

et al. 2023

Remote Sensing

View full text Add to dashboard Cite

Monitoring coastal seabed in very shallow waters (0–5 m) is a challenging methodological issue, even though such data is of major importance to many scientific and technical communities. Over the years, Structure-from-Motion (SfM) photogrammetry has emerged as a flexible and inexpensive method able to provide both a 3D model and high-resolution imagery of the seabed (~cm level). In this study, we propose a low-cost (about USD 1500), adaptable, lightweight and easily dismantled system called POSEIDON (for Platform Operating in Shallow-water Environment for Imaging and 3D reconstructiON). This prototype combines a floating support (typically a bodyboard), two imagery sensors (here, GoPro® cameras) and an accurate positioning system using Real Time Kinematic GNSS. Validation of this method was deployed in a macrotidal zone, comparing on the foreshore the point cloud provided by POSEIDON “SfM bathymetry” and by classical terrestrial SfM survey. Mean deviation was 5.2 cm and standard deviation was 4.6 cm. Such high-resolution SfM bathymetric surveys have a great potential for a wide range of applications: micro-bathymetry, hydrodynamics (bottom roughness), benthic habitats, ecological inventories, archaeology, etc.

show abstract

The influence of flight height and overlap on UAV imagery over featureless surfaces and constructing formulas predicting the geometrical accuracy

Cited by 14 publications

References 9 publications

Low-cost tools for virtual reconstruction of traffic accident scenarios

Low-cost tools for virtual reconstruction of traffic accident scenarios

Optimising UAV Data Acquisition and Processing for Photogrammetry: A Review

Low-Tech and Low-Cost System for High-Resolution Underwater RTK Photogrammetry in Coastal Shallow Waters

Contact Info

Product

Resources

About