Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W4, 45-50, 2016
https://doi.org/10.5194/isprs-archives-XL-3-W4-45-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
17 Mar 2016
EXTERIOR ORIENTATION OF HYPERSPECTRAL FRAME IMAGES COLLECTED WITH UAV FOR FOREST APPLICATIONS
A. Berveglieri1 and A. M. G. Tommaselli2 1Graduate Program in Cartographic Sciences, Univ Estadual Paulista – UNESP, Faculty of Science and Technology, Presidente Prudente, Brazil
2Department of Cartography, Univ Estadual Paulista – UNESP, Faculty of Science and Technology, Presidente Prudente, Brazil
Keywords: Forest, Hyperspectral Image, Orientation, Sparse Control, UAV Abstract. This paper describes a preliminary study on the image orientation acquired by a hyperspectral frame camera for applications in small tropical forest areas with dense vegetation. Since access to the interior of forests is complicated and Ground Control Points (GCPs) are not available, this study conducts an assessment of the altimetry accuracy provided by control targets installed on one border of an image block, simulating it outside a forest. A lightweight Unmanned Aerial Vehicle (UAV) was equipped with a hyperspectral camera and a dual-frequency GNSS receiver to collect images at two flying strips covering a vegetation area. The assessment experiments were based on Bundle Block Adjustment (BBA) with images of two spectral bands (from two sensors) using several weighted constraints in the camera position. Trials with GCPs (presignalized targets) positioned only on one side of the image block were compared with trials using GCPs in the corners. Analyses were performed on altimetry discrepancies obtained from altimetry checkpoints. The results showed a discrepancy in Z coordinate of approximately 40 cm using the proposed technique, which is sufficient for applications in forests.
Conference paper (PDF, 873 KB)


Citation: Berveglieri, A. and Tommaselli, A. M. G.: EXTERIOR ORIENTATION OF HYPERSPECTRAL FRAME IMAGES COLLECTED WITH UAV FOR FOREST APPLICATIONS, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-3/W4, 45-50, https://doi.org/10.5194/isprs-archives-XL-3-W4-45-2016, 2016.

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