Title
A fast alternative for the pixel purity index algorithm A fast alternative for the pixel purity index algorithm
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
conferenceObject
Publication
New york :Ieee ,
Subject
Economics
Physics
Source (journal)
2015 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
Source (book)
IEEE International Geoscience and Remote Sensing Symposium (IGARSS), JUL 26-31, 2015, Milan, ITALY
Volume/pages
(2015) , p. 1781-1784
ISSN
2153-6996
ISBN
978-1-4799-7929-5
ISI
000371696701225
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
We present a fast alternative for the popular pixel purity index (PPI) algorithm. This multi-dimensional PPI (MDPPI) algorithm is based on iteratively identifying convex hull indices in low-dimensional random projections. The MDPPI algorithm can yield identical results as the PPI algorithm, but several orders of magnitude faster. Furthermore, we show that the PPI algorithm is simply the MDPPI algorithm used in one dimension. In this work, we focus mainly on an efficient computational implementation of the algorithm. An ENVI implementation which can be used as a drop-in replacement of the standard PPI algorithm will be made available, along with a Matlab implementation.
E-info
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000371696701225&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000371696701225&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848
https://repository.uantwerpen.be/docman/iruaauth/325a9d/133177.pdf
Handle