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UAV-Based Photogrammetry: Current Systems and Methods

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Remote Sensors".

Deadline for manuscript submissions: closed (30 June 2019) | Viewed by 3599

Special Issue Editors


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Guest Editor
Institute of Geodesy and Photogrammetry, Technische Universität, 38106 Braunschweig, Germany
Interests: airborne and close-range photogrammetry; geometry and semantic analysis; terrestrial and mobile laser scanning
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Bochum University of Applied Sciences, Lab for Photogrammetry, Lennershofstr. 140, D-44801 Bochum, Germany
Interests: close-range photogrammetry; UAV: sensors and applications; terrestrial and mobile laser scanning; optical 3D measurement techniques

E-Mail Website
Guest Editor
German Aerospace Center (DLR), Institute of Optical Sensor Systems, Rutherfordstr. 2, D-12489 Berlin, Germany
Interests: artificial intelligence as a counterpart to traditional photogrammetric approaches; remote sensing in search and rescue operations; calibration and validation of heterogenous sensor concepts and their accuracy/quality
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Unmanned aerial vehicles (UAVs) are employed in many scientific disciplines. One major field where UAVs are utilized is in photogrammetry and remote sensing. That is, optical (passive) or active sensors are used to capture data (e.g., images) from objects with the aim of deriving geometric and/or semantic information from them. Applications range from topographic mapping in different scales to object inspection, aiming at high geometric quality. Currently, new opportunities arise, but also new challenges. The reasons for this are the advent of high-resolution optical sensors, which are close to metric cameras. Furthermore, lightweight laser scanning technology, combined with sophisticated sensor positioning hardware is maturing. All these developments are affecting processing workflows and methods. In this Special Issue, we call for papers which document the development or testing of those photogrammetric systems. Well-described and evaluated applications are also invited.

Prof. Dr.-Ing. Markus Gerke
Prof. Dr.-Ing. Heinz-Jürgen Przybilla
Dipl.-Ing. Henry Meißner
Guest Editors

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Keywords

  • metric cameras for UAVs
  • sensor and image quality
  • multispectral cameras
  • geometric quality (aerotriangulation, point cloud, ortho-image, etc.)
  • image flight configuration
  • UAV-based laserscanning
  • additional UAV-sensors: influences on flight-control (sense and avoid), navigation, and sensor-orientation

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Published Papers (1 paper)

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Research

16 pages, 4706 KiB  
Article
An Assembled Detector Based on Geometrical Constraint for Power Component Recognition
by Zheng Ji, Yifan Liao, Li Zheng, Liang Wu, Manzhu Yu and Yanjie Feng
Sensors 2019, 19(16), 3517; https://doi.org/10.3390/s19163517 - 11 Aug 2019
Cited by 5 | Viewed by 3009
Abstract
The intelligent inspection of power lines and other difficult-to-access structures and facilities has been greatly enhanced by the use of Unmanned Aerial Vehicles (UAVs), which allow inspection in a safe, efficient, and high-quality fashion. This paper analyzes the characteristics of a scene containing [...] Read more.
The intelligent inspection of power lines and other difficult-to-access structures and facilities has been greatly enhanced by the use of Unmanned Aerial Vehicles (UAVs), which allow inspection in a safe, efficient, and high-quality fashion. This paper analyzes the characteristics of a scene containing power equipment and the operation mode of UAVs. A low-cost virtual scene is created, and a training sample for the power-line components is generated quickly. Taking a vibration-damper as the main object, an assembled detector based on geometrical constraint (ADGC) is proposed and is used to analyze the virtual dataset. The geometric positional relationship is used as the constraint, and the Faster Region with Convolutional Neural Network (R-CNN), Deformable Part Model (DPM), and Haar cascade classifiers are combined, which allows the features of different classifiers, such as contour, shape, and texture to be fully used. By combining the characteristics of virtual data and real data using UAV images, the power components are detected by the ADGC. The result produced by the detector with relatively good performance can help expand the training set and achieve a better detection model. Moreover, this method can be smoothly transferred to other power-line facilities and other power-line scenarios. Full article
(This article belongs to the Special Issue UAV-Based Photogrammetry: Current Systems and Methods)
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