Category Image analysis
Publisher  Research Systems Inc 
Platform Win3x, Win95/98, WinNT, Mac, PowerMac, UNIX, Digital, HP, IBM, Linux, SGI, Solaris, Sun
Status Commercial
Description ENVI is an image processing system written in IDL. Interactive Contrast Enhancement. Interactive Histograms (Linear, Piecewise Linear,Histogram Equalisation, Histogram Matching, Gaussian Stretching, Density and Grey-Level Slicing). File-to-File Stretching. Input Formats: Flat Binary Files, Generic BIP, BIL, BSQ, User-Definable Data Formats, GeoSPOT - ARC/INFO. Images: ERDAS, DMSP, PostScript, GIF, HDF, JPEG, PICT, SRF, TIFF, XWD, USGS, DEM, USGS DLG, AutoCAD DXF. Output Formats: RGB Files, PostScript, GIF, PICT, SRF, TIFF, XWD, ARC/INFO Image Integrator, ArcView. Tape Utilities. File Utilities. Pre-Processing & Calibration: Flat Field Calibration, IAR Reflectance Calibration, Empirical Line Calibration, Replace Bad Lines, Dark Subtraction, Destripe Data, MSS & TM-specific Preprocessing. Registration & Rectification: Image-to-Map Registration, Image-to-Image Registration, Interactive Ground-Control Points. Warping Methods: Polynomial, RST, Delaunay Triangulation. Resampling Methods: Nearest Neighbour, Bilinear Interpolation, Cubic Convolution, Quintic Interpolation. Transforms: Band Ratios, Principal Components, Maximum Noise Fraction (MNF), Decorrelation Stretch, HSV to RGB/RGB to HSV, HSL to RGB/RGB to HSL, NDVI, Tasseled Cap. Filters: Convolution Filters (High & Low Pass, Laplacian, Directional, Gaussian, Median, Sobel, Roberts), Morphology Filters (Dilate, Erode, Opening, Closing), Texture Filter, Adaptive Filters (Lee, Local Sigma, Bit Errors), Interactive Fourier Filtering (Forward Transform, Interactive Frequency Domain Masking, Inverse Transform), User-defined Filter Kernels. Mathematics & Statistics: Band Math, Series and Scalar Math, Trigonometric Functions, Relational Operators, Boolean Operators, Type Conversion Functions, Average, Min, Max, Standard Deviation of Spectra, Band Minimums, Maximums, Means, Standard Deviations, Eigenvalues Eigenvectors, Covariance & Correlation Matrices, Band-Histograms. Region of Interest (ROI) & Classification. Mapping Functions. Map Projections: Universal Transverse Mercator, Lambert Conformable Conic, Gauss-Kruger, User-defined. Batch Operation. Spectral Analysis Tools. RADAR Functions. A downloadable copy of the ENVI Tutorial is available on the WWW.
Data formats supported Drawings  :  DXF 
Images  :  Graphics Interchange Format   :  JPEG   :  Tagged Image File 
Mapping and GIS  :  DEM   :  DLG   :  ERDAS   :  GEOSPOT   :  Shape 
Printer  :  Encapsulated postscript 
Supplier in United States of America  Research Systems Inc 

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