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ENVI 4.5 Product Updates
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Visual Information Solutions
ENVI 4.5 Value Proposition
• ArcGIS Interoperability: Geodatabase and ArcMap access
• Fx enhancements: Improved end-to-end workflow
• New analytical spectral tools: SID and ICA are powerful tools for image scientist
• Continued data format support: Worldview, NITF and TFRD updates
Access Analyze Share
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Visual Information Solutions
ENVI and ArcGIS Interoperability
•ENVI users will be able to:
•Access and read from ArcGIS Geodatabases
•Write out to geodatabases
•Supports enterprise, personal, and file Geodatabase types
•Launch ArcMap and create map compositions directly from ENVI
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Visual Information Solutions
New Sensor and Data Support
• WorldView-1 data in GeoTIFF, NITF, and Stereo Pair.
• NITF for 32- and 64-bit Linux systems
• Full TFRD support in ENVI Zoom
• Remote Data Access in ENVI (OGC/JPIP), not just in FX
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Visual Information Solutions
New Feature Extraction Functionality
• Programmatic access to Fx provides batch mode processing for production facilities and users with ENVI/IDL expertise–envi_doit, ‘envi_fx_doit’
• Vector and Attribute Export allows customers to use Fx segmentation results in other analyses and workflows–export segments as features prior to classification
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Visual Information Solutions
New Feature Extraction Functionality
• Summary Panel provides quick, practical, portable results
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Visual Information Solutions
New Feature Extraction Functionality
• Vector Smoothing for cleaner and smoother results, with fewer vertices and generalized features
– Douglas-Peucker based algorithm
– works on line and polygon output
– user controls smoothing threshold in pixels
• Create new vectors directly in ENVI Fx
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Visual Information Solutions
New Feature Extraction Functionality
• Save/Restore training data for supervised classification
• Reuse training sets on libraries of imagery
• Restore multiple training sets to build multi-source feature library
• Use saved training data as input to batch Fx
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Visual Information Solutions
New Spectral Algorithm – Independent Component Analysis (ICA)
Kaolinite: (ICA band 6)
Alunite: (ICA band 1)
Cuprite, NV - AVIRIS
• ICA transforms a set of mixed random signals into components that are as mutually independent as possible
• Independent components uses higher order statistics than Principal Components. Better distinguishes weak signals from background noise.
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Visual Information Solutions
Independent Component Analysis
• ICA can be used to find and separate hidden (noise) component
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Visual Information Solutions
Independent Component Analysis
• Other applications of ICA– anomaly detection
– dimension reduction
– noise reduction
– classification
– endmember extraction
• Programmatic interface– envi_doit, ‘envi_ica_doit’– envi_doit, ‘envi_ica_inv_doit’
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Visual Information Solutions
New Spectral Algorithm – Spectral Information Divergence (SID)
• Classification technique (similar to SAM) that uses a divergence measure to match pixels to reference spectra
• SID can characterize spectral similarity and variability more effectively than SAM
• As with all spectral tools, programmatic access is provided
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Visual Information Solutions
ENVI 4.5 with IDL 7.0
• A single, cross-platform IDL development environment that looks and behaves like a native application
• The foundation for new functionality that will continue to improve the usability of ENVI + IDL