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Proceedings Paper

Radiometric modelling of a 3D imaging laser scanner
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Paper Abstract

Active imaging systems allow obtaining data in more than two dimensions. In addition to the spatial information, these systems are able to provide the intensity distribution of one scene. From this data channel a certain number of physic magnitudes that show some features of the illuminated surface can be recovered. The different behaviours of the scene elements about the directionality of the optical radiation, wavelength or polarization improve the ability to discriminate them. In this work, the capabilities of one 3D imaging laser scanner have been tested from both dimensional and radiometric points of view. To do this, a simple model of the observing system and the scene, in which only the directional propagation of the energy is taken into account, has been developed. Selected parameters corresponding to transmission, reception and optomechanical components of the active imaging system describe the full sensor. The surfaces of a non-complex scene have been divided into different elements with a defined geometry and directional reflectance. In order to measure the directional reflectance of several materials in the specific wavelength where the laser scanner works, a laboratory bench has been developed. The calculation of the received signal by the sensor has been carried out using several radiative transfer models. These models were validated by experiments in a laboratory with controlled conditions of illumination and reflectance. To do this, a certain number of images (angle, angle, range and intensity) were acquired by a commercial laser scanner using several standard targets calibrated in geometry and directional reflectance.

Paper Details

Date Published: 11 October 2005
PDF: 11 pages
Proc. SPIE 5987, Electro-Optical and Infrared Systems: Technology and Applications II, 598709 (11 October 2005); doi: 10.1117/12.630543
Show Author Affiliations
Sergio Ortiz, Ctr. de Investigación y Desarrollo de la Armada (Spain)
Jose Diaz-Caro, Ctr. de Investigación y Desarrollo de la Armada (Spain)
Rosario Pareja, Ctr. de Investigación y Desarrollo de la Armada (Spain)

Published in SPIE Proceedings Vol. 5987:
Electro-Optical and Infrared Systems: Technology and Applications II
Ronald G. Driggers; David A. Huckridge, Editor(s)

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