Co-registration of multi-sensor UAV imagery. Case study: Boreal forest areas
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2022Resumen
Monitoring the regeneration process of a forest is an important part of forestry management.
Compared to traditional methods of counting tree species, UAVs have been a revolutionary means
of saving time and costs due to the temporal and spatial flexibility of data collection. In turn, the
integration of multispectral cameras allows the traditional vegetation indices that have been used
with satellite imagery to be obtained. However, data from multispectral cameras must be
combined with data from other types of sensors, such as RGB. It is therefore necessary to
co-register all the information in order to obtain combined vegetation indices and carry out
segmentation processes that allow the identification of the different tree species. In this study, the
coordinate transformation methods available in QGIS software through the georeferencer plugin
are evaluated. It also studies the influence of the number and distribution of control points on the
accuracy of the transformation. ...
Palabra/s clave
UAV-photogrammetry
Multi-sensor imagery
Coregistration
Forest planning
Forest inventory