Abstract
Laser scanning technique from airborne and land platforms has been largely used for collecting 3D data in large volumes in the field of geosciences. Furthermore, the laser pulse intensity has been widely exploited to analyze and classify rocks and biomass, and for carbon storage estimation. In general, a laser beam is emitted, collides with targets and only a percentage of emitted beam returns according to intrinsic properties of each target. Also, due interferences and partial collisions, the laser return intensity can be incorrect, introducing serious errors in classification and/or estimation processes. To address this problem and avoid misclassification and estimation errors, we have proposed a new algorithm to correct return intensity for laser scanning sensors. Different case studies have been used to evaluate and validated proposed approach.
Highlights
Laser scanning technique from airborne and ground platforms has been largely used for the reconstruction of high-resolution 3-D topography in the field of geosciences and other applications (Shan and Toth, 2008) (Laefer et al, 2014) (Bordin et al, 2013) (Ehlert and Heisig, 2013) (Sahin et al, 2012) (Buckley et al, 2008)
The results show that the proposed algorithm for edge-effect compensation is a feasible solution to recover the correct lasers return intensity according to the reflectance of the target structure, providing significant improvements and promising results for the development of applications based on laser scanning technique for different applications, including geoscience, civil engineering, environmental and geological studies
It’s possible to see that one rock is part of the edge effect since this specific rock reflects low laser pulse intensity
Summary
Laser scanning technique from airborne and ground platforms has been largely used for the reconstruction of high-resolution 3-D topography in the field of geosciences and other applications (Shan and Toth, 2008) (Laefer et al, 2014) (Bordin et al, 2013) (Ehlert and Heisig, 2013) (Sahin et al, 2012) (Buckley et al, 2008). When the purpose of the application is to analyze the reflectance of the laser’s return intensity to exploit properties of materials that compose the target, the edge effect should be compensated to avoid misclassification errors. To address this important problem, we have proposed a new algorithm to recover the correct returned laser intensity when an edge. The results show that the proposed algorithm for edge-effect compensation is a feasible solution to recover the correct lasers return intensity according to the reflectance of the target structure, providing significant improvements and promising results for the development of applications based on laser scanning technique for different applications, including geoscience, civil engineering, environmental and geological studies
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