Mr. Pedro G. Bascoy Profile

Pedro G. Bascoy

at CiTIUS

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Proceedings Article | 21 October 2019 Paper

Texture-based analysis of hydrographical basins with multispectral imagery

Pedro Bascoy, Alberto Garea, Dora Heras, Francisco Argüello, Alvaro Ordóñez

Proceedings Volume 11149, 111490Q (2019) https://doi.org/10.1117/12.2532760

KEYWORDS: Vegetation, Image segmentation, Image classification, Unmanned aerial vehicles, Data modeling, Multispectral imaging, Sensors, Remote sensing, Composites, Feature extraction

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In this paper the problem of studying the presence of different vegetation species and artificial structures in the riversides by using multispectral remote sensing information is studied. The information provided contributes to control the water resources in a region in northern Spain called Galicia. The problem is solved as a supervised classification computed over five-band multispectral images obtained by an Unmanned Aerial Vehicle (UAV). A classification scheme based on the extraction of spatial, spectral and textural features previous to a hierarchical classification by Support Vector Machine (SVM) is proposed. The scheme extracts the spatial-spectral information by means of a segmentation algorithm based on superpixels and by computing morphological operations over the bands of the image in order to generate an Extended Morphological Profile (EMP). The texture features extracted help in the classification of vegetation classes as the spatial-spectral features for these classes are not discriminant enough. The classification is computed over segments instead of pixels, thus reducing the computational cost. The experimental results over four real multispectral datasets from Galician riversides show that the proposed scheme improves over a standard classification method achieving very high accuracy results.

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