ENVI 4.5 Product Updates. Visual Information Solutions ENVI 4.5 Value Proposition ArcGIS...

ENVI 4.5 Product Updates

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


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


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


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



• Summary Panel provides quick, practical, portable results



• 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



• 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


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.


Independent Component Analysis

• ICA can be used to find and separate hidden (noise) component


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’


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


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

ENVI 4.5 Product Updates. Visual Information Solutions ENVI 4.5 Value Proposition ArcGIS...

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