Region-Based 3d Surface Reconstruction Using Images Acquired by Low-Cost Unmanned Aerial Systems

Abstract

ABSTRACT:An empirical relationship of Total Suspended Sediments (TSS) concentrations and reflectance values obtained with Drones' aerial photos and processed using remote sensing tools was set up as the main objective of this research. A local mathematic algorithm for the micro-watershed of the Teusacá River at La Calera, Colombia, was developed based on the computing of four component of bands from consumed-grade cameras obtaining from each their corresponding reflectance values from procedures for correcting digital camera imagery and using statistical analysis for study the fit and RMSE of 25 regressions. The assessment was characterized by the comparison of reflectance values and 34 in-situ data measurements concentrations between 1.6 and 33 −1 taken from the superficial layer of the river in two campaigns. A large data set of empirical and referenced algorithm from literature were used to evaluate the accuracy and precision of the relationship. For estimation of TSS, a higher accuracy was achieved using the Tassan's algorithm with the BAND X/ BANDX ratio. The correlation coefficient with 2 = demonstrate the feasibility of use remote sensed data with consumed-grade cameras as an effective tool for a frequent monitoring and controlling of water quality parameters such as Total Suspended Solids of watersheds, these being the most vulnerable and less compliance with environmental regulations.

Automated Aerial Triangulation for UAV-Based Mapping

“…In the past few years, low-cost Unmanned Airborne Vehicles (UAVs) equipped with consumer-grade imaging systems (e.g., commercial off-the-shelf digital camera) have emerged as a potential remote sensing platform that could satisfy the needs of a wide range of applications, such as precision agriculture [1][2][3][4][5][6][7][8][9], environmental monitoring [10][11][12][13][14], forest inventory [15,16], wildlife research [17,18], and archaeological applications [19,20]. Compared to conventional human-operated terrestrial and airborne mapping/remote sensing systems, the advantages of UAVs include their low-cost, small size, low flying height, ease of storage and deployment, and the capability of providing high spatial resolution geospatial data at a higher data collection rate [21][22][23]. From a mapping point of view, deriving accurate three-dimensional (3-D) geo-spatial information from UAV-based imagery requires the interior orientation parameters (IOPs) of the utilized camera, and exterior orientation parameters (EOPs) of the involved images.…”

Low-cost 3D reconstruction of cultural heritage artifacts

“…With the even greater advances in computing power of the last years, a new approach became popular: shape from motion 2007), which is present in several works (Manferdini;Makantasis et al;Lari et al;. This approach generally relies on a large amount of still images with considerable overlap (or a video) and works by tracking points of interest across di erent images of a set.…”

“…Some popular approaches include using pairwise stereoscopy 2007), the silhouettes of the objects (Brusco et al; or the estimate of motion between pictures (Lari et al;Manferdini;. Image-based 3D reconstruction is usually more accessible in terms of necessary hardware than scanner-based approaches, due to the wide availability and low price of digital cameras.…”

“…References Number of Studies Texture Mapping (Brusco et al;, , , (Isoda et al;, 2007), , (Lari et al;, (Manferdini;, (Ragia et al;, (Remondino;2007), (Rocchini et al;, , (Sormann et al;, (Utomo and Wibowo;2017) 14 None (Banerjee et al;, (Boochs et al;2007), (Caprioli and Scognamiglio;, (Covas et al;, (Makantasis et al;, (Pedersini et al;, (Prokos et al;, (Stentoumis et al;, (Vogiatzis and Hernández;2010) …”

“…Makantasis (Makantasis et al; et al took advantage of shape from motion techniques, together with their novel data-ltering algorithm, to reconstruct a large heritage building using only images obtained from the Internet; however, they present only a point cloud, instead of producing a polygonal mesh. With the recent availability of consumer-grade unmanned aerial vehicles (UAV), one study (Lari et al; has already set out to use images from UAVs to reconstruct an entire building using aerial videos and pictures, which is a good application of shape from motion techniques because of the large overlap that invariably happens between images taken from great heights.…”