Abstract
Brightness measurement with an airborne or terrestrial laser scanner is a
new concept since the intensity information recorded by the laser
scanner detectors has, thus far, not been used or implemented in surface
brightness studies. This is partly due to the calibration problems and
the lack of information on the behavior of laser light in the
observation geometry where laser scanners operate. In addition, the 3-D
position information has, thus far, been sufficient for surface
modeling. We present a new type of empirical calibration scheme for
laser scanner intensity developed with a terrestrial laser scanner in
laboratory and field conditions using brightness targets and a
calibrated reference panel. We compare the results with those obtained
from airborne laser scanner flight campaigns using the same set of
brightness targets. It turns out that the relative calibration of laser
scanner intensity is possible using a calibrated grayscale but requires
background information of the targets and the conditions in which the
measurements are carried out. We also discuss the feasibility and uses
of a laser-scanner-based intensity measurement in general.
Original language | English |
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Pages (from-to) | 528-533 |
Journal | IEEE Transactions on Geoscience and Remote Sensing |
Volume | 46 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2008 |
MoE publication type | A1 Journal article-refereed |
Keywords
- backscatter
- laboratory measurement
- laser scanning
- lasers
- reflectance
- calibration
- remote sensing
- lidars