Description
Probabilistic graphical models have strong potential for use in hyperspectral image classification. One important class of probabilisitic graphical models is the Conditional Random Field (CRF), which has distinct advantages over traditional Markov Random Fields (MRF), including: no independence assumption is made over the observation, and local and pairwise potential features can be defined with flexibility. Conventional methods for hyperspectral image classification utilize all spectral bands and assign the corresponding raw intensity values into the feature functions in CRFs. These methods, however, require significant computational efforts and yield an ambiguous summary from the data. To mitigate these problems, we propose a novel processing method for hyperspectral image classification by incorporating a lower dimensional representation into the CRFs. In this paper, we use representations based on three types of graph-based dimensionality reduction algorithms: Laplacian Eigemaps (LE), Spatial-Spectral Schroedinger Eigenmaps (SSSE), and Local Linear Embedding (LLE), and we investigate the impact of choice of representation on the subsequent CRF-based classifications.
Date of creation, presentation, or exhibit
8-31-2015
Document Type
Conference Paper
Department, Program, or Center
Electrical Engineering (KGCOE)
Recommended Citation
Yang Hu, Nathan D. Cahill, Sildomar T. Monteiro, Eli Saber, David W. Messinger, "Low-dimensional representations of hyperspectral data for use in CRF-based classification" Proc. SPIE 9643, Image and Signal Processing for Remote Sensing XXI, 96430L (October 15, 2015); doi:10.1117/12.2195229.
Campus
RIT – Main Campus
Comments
Copyright 2015 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.