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Sparse superpixel unmixing for hyperspectral image analysis
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Gilmore, Martha Castano, Rebecca Thompson, David R. |
| Copyright Year | 2010 |
| Description | Software was developed that automatically detects minerals that are present in each pixel of a hyperspectral image. An algorithm based on sparse spectral unmixing with Bayesian Positive Source Separation is used to produce mineral abundance maps from hyperspectral images. A superpixel segmentation strategy enables efficient unmixing in an interactive session. The algorithm computes statistically likely combinations of constituents based on a set of possible constituent minerals whose abundances are uncertain. A library of source spectra from laboratory experiments or previous remote observations is used. A superpixel segmentation strategy improves analysis time by orders of magnitude, permitting incorporation into an interactive user session (see figure). Mineralogical search strategies can be categorized as supervised or unsupervised. Supervised methods use a detection function, developed on previous data by hand or statistical techniques, to identify one or more specific target signals. Purely unsupervised results are not always physically meaningful, and may ignore subtle or localized mineralogy since they aim to minimize reconstruction error over the entire image. This algorithm offers advantages of both methods, providing meaningful physical interpretations and sensitivity to subtle or unexpected minerals. |
| File Size | 86856 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20100033546 |
| Archival Resource Key | ark:/13960/t3vt6n107 |
| Language | English |
| Publisher Date | 2010-09-01 |
| Access Restriction | Open |
| Subject Keyword | Man/system Technology And Life Support Sensitivity Image Analysis Statistical Analysis Algorithms Mineralogy Automatic Control Segments Pixels Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
