AUTOMATED THRESHOLDING OF ACTIVE LAVAS USING AVHRR DATA

Authors
HARRIS AJL SWABEY SEJ HIGGINS J
Citation
Ajl. Harris et al., AUTOMATED THRESHOLDING OF ACTIVE LAVAS USING AVHRR DATA, International journal of remote sensing, 16(18), 1995, pp. 3681-3686
Citations number
5
Categorie Soggetti
Photographic Tecnology","Remote Sensing
Journal title
International journal of remote sensing → ACNP
ISSN journal
01431161
Volume
16
Issue
18
Year of publication
1995
Pages
3681 - 3686
Database
ISI
SICI code
0143-1161(1995)16:18<3681:ATOALU>2.0.ZU;2-6
Abstract
An automated algorithm for thresholding hot pixels in AVHRR data is pr esented. The algorithm, applied to cloud-free sub-images of channel 3 minus channel 4 brightness temperature, compares each target pixel wit h its immediate background and then compares this difference with the natural variation in the surrounding region. Application to images of Mount Etna identified thermally anomalous pixels containing active lav a or vents.