A FAST ALTERNATIVE FOR THE PIXEL PURITY INDEX ALGORITHM

被引：0
|
作者：
Heylen, Rob [1 ]
Akhter, Muhammad Awais [1 ]
Scheunders, Paul [1 ]
机构：
[1] Univ Antwerp, IMinds Visionlab, Univ Pl 1, B-2610 Antwerp, Belgium
来源：
2015 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS) | 2015年
关键词：
Hyperspectral imaging; Spectral analysis;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
引用
收藏
页码：1781 / 1784
页数：4
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