Results 141 to 150 of about 636 (172)

Advances in hyperspectral LWIR pushbroom imagers

SPIE Proceedings, 2011
Two long-wave infrared (LWIR) hyperspectral imagers have been under extensive development. The first one utilizes a microbolometer focal plane array (FPA) and the second one is based on an Mercury Cadmium Telluride (MCT) FPA. Both imagers employ a pushbroom imaging spectrograph with a transmission grating and on-axis optics. The main target has been
Hannu Holma, Antti-Jussi Mattila, Timo Hyvärinen, Oliver Weatherbee   +3 more
openaire   +1 more source

Catadioptric Systems For Pushbroom Sensors

SPIE Proceedings, 1990
The development of focal plane technology in the production of very large linear arrays for infra-red sensors must be matched with optical systems capable of resolving up to 3000 pixels. Such systems have application in earth observation from space or airborne platforms.
openaire   +1 more source

Advanced pushbroom hyperspectral LWIR imagers

SPIE Proceedings, 2009
Performance studies and instrument designs for hyperspectral pushbroom imagers in thermal wavelength region are introduced. The studies involve imaging systems based on both MCT and microbolometer detector. All the systems employ pushbroom imaging spectrograph with transmission grating and on-axis optics.
Hannu Holma, Timo Hyvärinen, Jarmo Lehtomaa, Harri Karjalainen, Risto Jaskari   +4 more
openaire   +1 more source

Direct georeferencing of airborne pushbroom images

Journal of the Chinese Institute of Engineers, 2015
Direct georeferencing (DG) for orthoimage production based on collinearity equations has emerging as a standard photogrammetric operation. In this paper, the basic idea of DG is realized and refined with 19 self-calibration parameters for rectifying airborne pushbroom hyperspectral images collected using the intelligent spectral imaging system (ISIS ...
Ching-Kuo Yeh, Victor J.D. Tsai
openaire   +1 more source

Prediction of Georeferencing Precision of Pushbroom Scanner Images

IEEE Transactions on Geoscience and Remote Sensing, 2012
The precision of georeferencing of pushbroom satellite images without using ground control points is estimated. The study includes what-if scenarios for various precisions of star trackers, GPS receivers, image acquisition timing, interior camera parameters, and digital elevation model (DEM).
openaire   +2 more sources

Pushbroom Hyperspectral Imaging With a Coded Aperture

Frontiers in Optics, 2006
We describe a hyperspectral camera which operates by translating a scene across the entrance of a coded aperture spectrometer. This applies a sequence of unique codes to the image, allowing full reconstruction of the datacube.
A. D. Portnoy, M. E. Gehm, D. J. Brady
openaire   +1 more source

Calibration of inexpensive pushbroom imaging spectrometers

Metrologia, 1998
We demonstrate the calibration and error estimation for three inexpensive pushbroom imaging spectrometers that operate in the visible/near-infrared range. The instruments were all built at the Naval Research Laboratory from commercial, off-the-shelf components.
J Bowles, M Kappus, J Antoniades, M Baumback, M Czarnaski, C O Davis, J Grossmann   +6 more
openaire   +1 more source

Pushbroom-Frame Imagery Co-Registration

Marine Geodesy, 2012
More and more littoral surveys are conducted with aerial platform sensor suites that include a hyperspectral pushbroom sensor and a frame camera. However, in some cases, data from auxiliary sensors may contain errors or are not available. For many research groups, a high-accuracy registration of the multi-sensor data relative to each other is essential,
Yuri Rzhanov, Shachak Pe’eri
openaire   +1 more source

Field deployable pushbroom hyperspectral imagining polarimeter

SPIE Proceedings, 2016
ABSTRACT Hyperspectral polarimetry is demonstrated to measure the spect rum and polarization state of a scene. This information is important to identify material properties for applications such as remote sensing and agricultural monitoring, among others.
Mariano Lowenstern, Michael W. Kudenov
openaire   +1 more source

Low‐altitude Terrestrial Spectroscopy from a Pushbroom Sensor

Journal of Field Robotics, 2015
Hyperspectral cameras sample many different spectral bands at each pixel, enabling advanced detection and classification algorithms. However, their limited spatial resolution and the need to measure the camera motion to create hyperspectral images makes them unsuitable for nonsmooth moving platforms such as unmanned aerial vehicles (UAVs). We present a
Juan-Pablo Ramirez-Paredes, David John Lary, Nicholas R. Gans   +2 more
openaire   +1 more source