Publication
Title
A fast alternative for the pixel purity index algorithm
Author
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.
Language
English
Source (journal)
IEEE International Geoscience and Remote Sensing Symposium proceedings. - [New York]
Source (book)
IEEE International Geoscience and Remote Sensing Symposium (IGARSS), JUL 26-31, 2015, Milan, ITALY
Publication
New york : Ieee, 2015
Volume/pages
(2015), p. 1781-1784
ISI
000371696701225
Number
978-1-4799-7929-5
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 10.05.2016
Last edited 13.08.2017
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