ENVI 4.5 Functional Summary - Exelis VIS

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• Vector LayersInteractive 2-D Scatter PlottingInteractive Histograms & Stretching:• Arbitrary Stretching• Auto Apply Stretches• Gaussian Stretching• Histogram Equalization Stretching• Histogram Matching Between Displays• Linear, Piecewise Linear Stretching• Square Root Stretching• Import/Export ASCII Look Up Tables• User-Defined Look Up TablesInteractive Pixel EditorLine-of-Sight (Viewshed) AnalysisLink Unlimited DisplaysMeasurement ToolOutput Displays to File or PrinterOutput Displays of Zoom WindowQuick Filters:• Sharpen• Smooth• MedianQuick Color-Infrared, True-Color DisplaysSave and/or Restore Display GroupSelect Display Bands from Spectral PlotsSet Default Display BandsSpatial and Spectral Pixel EditingSpatial and Spectral ProfilesSub-Pixel Cursor LocationUnlimited Number of DisplaysVirtual MosaicVector Overlays & GIS CapabilitiesRegions of InterestBuffer Zones Around ROIsClassification Images from ROIsExport ROIs to VectorsInput ROIs from ASCIIInteractive, Easy-to-use ROI Definition:• Draw Polygons, Polylines, Pixels• Draw ROIs with Interior Spaces (Donuts)• ROIs from Intersection of Other ROIs• Multiple Objects Within One ROI• ROI Definition via Scatter Plots• Threshold Images to ROI• Merge ROIs• Import ROIs from VectorsOutput ROIs to ASCIIROI Save & RestoreReconcile ROIs between Images viaMap CoordinatesROI Growing Based on StatisticsROI StatisticsData PreparationCreate New Standard or Virtual Image Filefrom Existing BandsGenerate Test ImageMask Generation From:• Annotation• Image Data Values• ROIs• Intersection of ROIs• Vectors• NaNMosaic Functions:• Color Mosaic Preview• Cutline & Edge Feathering• Interactively Mosaic Multiple Bands, Files• Mosaic by Pixel (Line, Sample) or MapCoordinates• Automatic Color Balancing• Standard Image or Virtual Mosaic OutputDefine Spatial Subset by:• Drawing on Display• File, Map Coordinates• Region of Interest• Other Image Extent• Meta Scroll ExtentRotate/Flip DataSpatial and Spectral SubsetsStorage Order (Interleave) Conversions:• BSQ, BIL, BIP• New File or Replace OriginalStretch DataSubsample ImagesPre-processing & CalibrationApply Gain & OffsetBad Band IdentificationBad Line ReplacementBad Pixel ReplacementCross-Track Illumination CorrectionDark SubtractionDestripe DataEmpirical Line CalibrationERS and Radarsat Data CalibrationFlat Field CalibrationIgnore Pixel ValueInternal Average Relative ReflectanceCalibrationLog ResidualsMODIS Bowtie CorrectionRadiometric Calibrations:• AVHRR• Landsat MSS, TM, ETM• TIMS• QuickBirdSea Surface Temperature From AVHRRThermal Atmospheric CorrectionRegistration & RectificationAssociate DEM With ImageAutomatic Georeferencing of ASTER,AVHRR, AATSR, ASAR, MERIS, MODIS,Radarsat, SeaWiFS, SPOTSubpixel Ground Control Point LocationsGeorectify SPOT Using Information FromLeader FileGround Control Points PredictionImage-to-Map RegistrationImage-to-Image RegistrationInteractive Ground Control Point CollectionImport Ground Control Points from FileOrthorectification:• Aerial Photographs (Digital and Frame)• ASTER• CARTOSAT-1• Generic RPC• Generic Pushbroom Sensors• IKONOS• OrbView - 3• QuickBird• SPOT 1-5Radial ResamplingRational Polynomial Coefficients(RPCs) SupportReplacement Sensor Model (RSM)Real-time GPS LinkRotated ProjectionsSave Transformation Matrix to ASCIIWarp Resampling Methods:• Bilinear• Cubic Convolution• Nearest NeighborWarping Methods:• Delaunay Triangulation• Polynomial• Rotation, Scaling, Translation (RST)Map Projection SupportConvert Coordinates Among ProjectionsContours From Any Registered ImageConvert Map ProjectionDatum Support (>100)Dozens of Prebuilt Map Projections(Examples Include):• Universal Transverse Mercator (UTM)• State Plane• Gauss-Kruger• Map Grid of Australia• Mississippi Standard Transverse MercatorEllipsoid Support (>35)Pseudo-Projections from RPCs and RSMUser-Defined Map ProjectionsUser-Defined Projection UnitsUSGS GCTP Projections, Including:• Albers Conical Equal Area• Azimuthal Equal Area• Lambert Conformal Conic• Space Oblique Mercator (A & B)• Stereographic• Transverse MercatorVector GIS FunctionsAdd Nodes to VectorsAnnotate Vector WindowsAttributes:• Create New Vector Attributes• Edit Query Vector Attributes• Import from ArcView Shapefiles, ASCII• Query to Create New Vector LayerBurn-in Vectors on Raster ImageConvert Vector Layer ProjectionCreate Contour Vectors from Raster DataCreate New Vector LayersCreate Vector Boundaries:• Countries, States, Coasts, Rivers• For Whole World• For Lat/Long BoundariesDirect Printing of GIS LayersDisplay Vectors with Different Projections inthe Same WindowDrag/Drop to Arrange Layer OrderEdit Layer CharacteristicsExport Vector Data to Common GIS FormatsExport Vector AttributesGPS InputHeads-up (On-screen) DigitizingIntelligent DigitizerImport Common GIS Formats:• ESRI Shapefiles• Arc Interchange• AutoCAD DXF• MapInfo• Microstation DGN• USGS DLG(continued on page 3)
• USGS SDTS• <strong>ENVI</strong> Native Vector FormatInteractive Vector Layer QueryingJoin VectorsMultiple Vector SelectionOn-the-fly Vector Projection ConversionRaster to Vector ConversionsSplit VectorsVector Cursor QueryVector Display ZoomingVector EditingVector to Raster ConversionSpectral Analysis ToolsAnomaly DetectionAutomated Corner Clustering in N-D Scatter PlotBandMax Band OptimizationContinuum Removal of Images, SpectraDecision Tree ClassifierExtraction of Endmember SpectraIntegrated Spectral Viewing & AnalysisLinear Spectral UnmixingLeast Squares (LS) FitMatched FilteringMixture Tuned Matched FilteringN-Dimensional Visualizer (Scatter Plot)Pixel EditingPixel Purity Index (PPI)Registration Suppression AlgorithmSAM Target Finder With BandMaxSMACC Endmember Extraction & Sub-pixelAnalysisSPEAR Tools:• Change Detection - PCA• Change Detection - Subtractive• Pan-Sharpening• Lines of Communication - Water• Lines of Communication - Roads• Watercraft Finder• Relative Water Depth• Vegetation Delineation and Stress Detection• Spectral Analogues• TERCAT (Terrain Categorizations)Spectral Resampling:• Predefined Sensor Band Filters• User Defined Filters• Spectral Libraries and ImagesSpectral Analyst for Material IdentificationSpectral Angle Mapper (SAM)Spectral Feature Fitting (SFF)Spectral Hourglass WizardSpectral Information DivergenceSpectral Libraries Included:• Spectral Information Divergence• Minerals, Vegetation, Rocks, Water, Soils,Snow, Manmade• VNIR, SWIR, MWIR, LWIRSpectral Library Builder/ImporterSpectral Library ViewerSpectral MathSpectral Plots:• Boxcar Average of Pixel Spectra• Continuum Removal• Cursor Query of X,Y Plot Values• Drag and Drop Spectra Among Plot• From 3D SurfaceView• From Image Pixels (Z Profile)• From Spectral Libraries• From ROI Averages• Link Spectral Plots from Multiple Images• Plot Stacked Spectra• User-Defined Plot Functions• Wavenumber or WavelengthSpectral SlicesVegetation Guided Workflows• Fire Fuel Load• Agricultural Stress• Forest HealthVegetation Indices• Greenness• Light-use Efficiency• Canopy Nitrogen• Senescent Carbon• Canopy Water• Leaf PigmentVegetation Suppression AlgorithmTransformsBand RatiosColor Transforms:• RGB to HSV, HSL, or Munsell HSV• HSV, HSL, or Munsell HSV to RGBDecorrelation StretchIndependent Components AnalysisImage Sharpening:• Color Normalized Spectral• Gram-Schmidt Spectral• HSV and Brovey• PC Spectral• Preserving Spectral IntegrityMinimum Noise Fraction (MNF)Normalized Difference Vegetation Index (NDVI)Pan Sharpening (see Image Sharpening)Principal Components RotationSaturation StretchSynthetic Color ImageTasseled CapFiltersAdaptive Filters:• Frost, Enhanced Frost Gamma, Kuan, Lee,Enhanced Lee, Local Sigma, Bit ErrorConvolution Filters:• High & Low Pass, Laplacian, Directional,Gaussian, Median, Sobel, RobertsFiltering PreviewInteractive Fourier Filtering:• Forward Transform• Interactive Frequency Domain Masking• Inverse TransformMorphology Filters:• Dilate, Erode, Opening, ClosingTexture Filters:• Data Range, Mean, Variance, Entropy,Skewness, Homogeneity, Contrast,Dissimilarity, Second Moment, CorrelationUser-Defined Filter KernelsMathematics & StatisticsAutocorrelationBand HistogramsBand Math and Spectral Math:• Boolean Operators• Trigonometric Functions• Data Type Conversion Functions• Relational Operators• Many Other Mathematical ExpressionsCorrelogramsDisplay Statistics:• Minimum, Maximum, Mean, StandardDeviationImage Statistics:• Band Minimum, Maximum, Mean, StandardDeviation, Eigenvalues, Eigenvectors,Covariance, Correlation MatricesOutput Matrix Stats to Image Files:• Covariance Matrix• Correlation Matrix• EigenvectorsSemivariogramsImage ClassificationAccuracy AssessmentAIRSAR Scattering Mechanism ClassifierAutomatic Legends for Classified ImagesChange Detection, Thematic and GrayscaleImagesClassification PreviewClass StatisticsClassification Image from ROIsDecision TreesDensity SlicingInteractive User-Defined Rule ClassifierReceiver Operating Characteristic (ROC)Curves:• Find Optimal Classification Thresholds• Decrease False ClassificationsSeparate Classification Thresholds for EachClassSupervised Classifications:• Binary Encoding• Parallelepiped• Mahalanobis Distance• Minimum Distance• Maximum Likelihood• Neural Network• Spectral Angle Mapper (SAM)• Support Vector Machine (SVM)• TERCAT (Terrain Categorization)• Change Detection - PCA• Change Detection - SubtractionTraining Data From:• Regions of Interest• Pixel Spectra• Library SpectraUnsupervised Classifications:• K-means• IsodataVegetation Guided Workflows• Fire Fuel Load• Agricultural Stress• Forest HealthPost Classification ToolsAccuracy Assessment:• Kappa Coefficient• Confusion MatrixClassification to VectorClass StatisticsInteractive Class Overlay ToolReassign Class Colors, NamesSpatial Functions:• Buffer Zones Around Classes• Clump, Sieve, Combine• Majority & Minority Analysis• Segmentation Image(continued on page 4)
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ENVI 4.5 Functional Summary - Exelis VIS

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