2019
DOI: 10.3390/drones3030063
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Multi-Sensor Assessment of the Effects of Varying Processing Parameters on UAS Product Accuracy and Quality

Abstract: There is a growing demand for the collection of ultra-high spatial resolution imagery using unmanned aerial systems (UASs). UASs are a cost-effective solution for data collection on small scales and can fly at much lower altitudes, thus yielding spatial resolutions not previously achievable with manned aircraft or satellites. The use of commercially available software for image processing has also become commonplace due to the relative ease at which imagery can be processed and the minimal knowledge of traditi… Show more

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Cited by 18 publications
(10 citation statements)
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“…These tie points are used for initial image mosaicking without having information of these points in ground coordinates. Tie points and GCPs are then used in the bundle block adjustment (BBA) process to calculate a sparse point cloud in real world coordinates [ 39 ].…”
Section: Methodsmentioning
confidence: 99%
“…These tie points are used for initial image mosaicking without having information of these points in ground coordinates. Tie points and GCPs are then used in the bundle block adjustment (BBA) process to calculate a sparse point cloud in real world coordinates [ 39 ].…”
Section: Methodsmentioning
confidence: 99%
“…The Pix4D software uses a modified SfM photogrammetric technique to search and match the points from multiple two-dimensional image sequences resulting from the motion of a camera mounted on UAVs [70]. The software is able to create point clouds, orthomosaics, DSMs as well as an explanatory process report as a pdf file [71].…”
Section: The Softwarementioning
confidence: 99%
“…Pix4D uses a modified structure-from-motion, or SFM, approach to process UAV imagery. SFM is a photogrammetric technique used to estimate the three-dimensional (3D) structure of objects from multiple two-dimensional (2D) offset image sequences [45]. SFM, using SIFT to match features, can calculate the camera position and its orientation from images only, without prior information of their parameters.…”
Section: Data Processingmentioning
confidence: 99%