User profiles for E Ahokas
Eero AhokasSenior research scientist Verified email at fgi.fi Cited by 2119 |
[HTML][HTML] Remote sensing methods for power line corridor surveys
To secure uninterrupted distribution of electricity, effective monitoring and maintenance of
power lines are needed. This literature review article aims to give a wide overview of the …
power lines are needed. This literature review article aims to give a wide overview of the …
[HTML][HTML] Review on active and passive remote sensing techniques for road extraction
… photons to electrons by the detector to yield an electronic signal. This electronic signal is
then amplified, digitised and recorded by the electronic unit. The instrument performance and …
then amplified, digitised and recorded by the electronic unit. The instrument performance and …
[HTML][HTML] Object-based analysis of multispectral airborne laser scanner data for land cover classification and map updating
… 609′18″N, 2438′24″E). It comprises about 10 km 2 of land area (Fig. 1). … Radiometric
calibration of ALS intensity is an important prerequisite for successful classification (Ahokas et …
calibration of ALS intensity is an important prerequisite for successful classification (Ahokas et …
[HTML][HTML] Automatic detection of buildings and changes in buildings for updating of maps
… 100 ∗ A o v e r l a p A m a p _ b u i l d i n g ≥ T h r , … 100 ∗ A o v e r l a p A d e t e c t e d
_ b u i l d i n g ≥ T h r , … M e a n a c c u r a c y = 2 n C B & M B n M B + n C B 100 % , …
_ b u i l d i n g ≥ T h r , … M e a n a c c u r a c y = 2 n C B & M B n M B + n C B 100 % , …
Radiometric calibration of LIDAR intensity with commercially available reference targets
… , Helsinki University of Technology, 02150 Espoo, Finland (e-mail: Hannu.Hyyppa@tkk.fi).
J. … Hyyppä, and E. Ahokas, “Brightness measurements and calibration with airborne and …
J. … Hyyppä, and E. Ahokas, “Brightness measurements and calibration with airborne and …
[PDF][PDF] Calibration of the Optech ALTM 3100 laser scanner intensity data using brightness targets
In this paper the calibration of Optech ALTM 3100 laser scanner intensity is reported using
airborne experiments and known brightness targets. The Finnish Geodetic Institute has had a …
airborne experiments and known brightness targets. The Finnish Geodetic Institute has had a …
Study of surface brightness from backscattered laser intensity: Calibration of laser data
Systematic laboratory measurements of laser backscatter intensity are presented for brightness
calibration targets, and a calibration scheme for airborne laser scanner intensity data is …
calibration targets, and a calibration scheme for airborne laser scanner intensity data is …
Brightness measurements and calibration with airborne and terrestrial laser scanners
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 …
the intensity information recorded by the laser scanner detectors has, thus far, not been …
Geometric test field calibration of digital photogrammetric sensors
Test field system calibration will be a fundamental part of the future photogrammetric production
line. Accurate calibration and performance evaluations are necessary for fully assessing …
line. Accurate calibration and performance evaluations are necessary for fully assessing …
[PDF][PDF] A quality assessment of airborne laser scanner data
A Toposys-1 airborne laser scanner (ALS or LIDAR) measurement campaign was arranged
in June 2000 (Kalkkinen) and another campaign with helicopter-borne TopEye laser …
in June 2000 (Kalkkinen) and another campaign with helicopter-borne TopEye laser …