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Rolando V. Raqueño Wednesday, April 19, 202311
Research Systems, Inc.
Software Vision
Rolando V. Raqueño Wednesday, April 19, 202322
Presentation Outline
• Introducing Research SystemsIntroducing Research Systems
• IDL overviewIDL overview
• ENVI - remote sensing application
• Visible Human - anatomical CD reference
• VIP
• RiverTools
• NeoSys
Rolando V. Raqueño Wednesday, April 19, 202333
The Company
• Founded in 1977
• Privately owned - internally financed
• Growing strong, continuously profitable
• 70+ Employees
• 25,000 IDL users worldwide
• Distribution in more than 35 countries
Rolando V. Raqueño Wednesday, April 19, 202344
IDL Target Markets
• Focus on technical user– Physical Sciences– General Imaging– Medical Imaging– Engineering
Rolando V. Raqueño Wednesday, April 19, 202355
Some RSI Customers
• Barrick Exploration• CSIRO• Daimler Benz• Fujitsu• Lawrence Livermore
National Lab• Lockheed Martin
• NASA• NIH• NOAA• Sandia Nat’l Lab• Siemens• Texaco• US Geological Survey
Rolando V. Raqueño Wednesday, April 19, 202366
Research Systems’ Products
• IDL– Interactive Data Language
• ENVI– Environment for Visualizing Images
• Visible Human CD– Human Anatomy Reference
Rolando V. Raqueño Wednesday, April 19, 202377
IDL Overview
Rolando V. Raqueño Wednesday, April 19, 202388
What is IDL?
• Technical computing environment– data analysis– visualization– array-oriented language – interactive execution and/or programs– portable application development
Rolando V. Raqueño Wednesday, April 19, 202399
The Benefits of IDL
• Easy– access via GUI, programs and commands– high-level language simplifies programming
• Flexible– integrated, comprehensive system– cross-platform development tool
• Fast – rapid application development– efficient array processing
Rolando V. Raqueño Wednesday, April 19, 20231010
IDL is a Language
• 4GL optimized for technical applications– simple and complete
– procedural and modular
• Wide variety of data structures, types:– scalar, vector, array and records
– eight native data types
• Integrated graphics, GUI, math & stats• Generalized input/output
Rolando V. Raqueño Wednesday, April 19, 20231111
IDL is Array-Oriented
• Natural representation for technical data– Avoids most loops
• Operators work on arrays and scalars:– A = B + C– C = SIN(2 * !PI * A)– POWER = ALOG(ABS(FFT(A, -1)))
• Numerous functions for array manipulation• Quick to program and execute
Rolando V. Raqueño Wednesday, April 19, 20231212
IDL is Portable
• Built-in program and data portability:
– Windows 95/98/NT OpenVMS
– Unix Linux
– Macintosh Power Mac
• XDR binary data interchange
• Cross-platform GUI toolkit
Rolando V. Raqueño Wednesday, April 19, 20231313
IDL is Open
Import/export virtually any type of data User-definable functions and procedures Programs are cross-platform (somewhat) Access to Fortran or C code (not very easy)
Rolando V. Raqueño Wednesday, April 19, 20231414
IDL Functionality Overview
Rolando V. Raqueño Wednesday, April 19, 20231515
2D Graphics
• Contour plots
• XY plots
Rolando V. Raqueño Wednesday, April 19, 20231616
Integrated Mapping
• Integrated with graphics
• 2D & 3D polygon filling
• Map overlays– images, contours– continents, coasts,
borders, rivers – multiple resolutions
• Many projections
Rolando V. Raqueño Wednesday, April 19, 20231717
IDL Map Projections
• Azimuthal– Stereographic
– Orthographic
– Gnomonic
– Lambert’s Equal Area
– Satellite
– Hammer-Aitoff
• Cylindrical– Mercator
– Conic
– Cylindrical
– Equidistant
• Sinusoidal• Mollweide• User-defined
Rolando V. Raqueño Wednesday, April 19, 20231818
Surface Plots
• Mesh surface plots
• Shading with light-sources, elevation or other variables
Rolando V. Raqueño Wednesday, April 19, 20231919
3D Graphics
• Z-buffered graphics
• Isosurfaces
• Voxel rendering
Rolando V. Raqueño Wednesday, April 19, 20232020
Image Processing• Contrast enhancement• Edge detection,
smoothing, sharpening• Morphological
operations• Geometric
transformations• Frequency domain
processing
Rolando V. Raqueño Wednesday, April 19, 20232121
Fast & Easy Image Processing
• Compute and display a 512 x 512 power spectrum in under 5 seconds on a standard PC:TV, ab = ALOG(ABS(FFT(a,-1)))TVSCL, SHIFT(b, 256,256)
Rolando V. Raqueño Wednesday, April 19, 20232222
Mathematics
• Arrays & matrices• Correlation• Eigenvalues/vectors• Curve fitting• Surface fitting• Gridding• Interpolation
• Sparse arrays• Linear systems• Nonlinear equations• Optimization• Time-series analysis• Integration• ODE: Runge-Kutta
Rolando V. Raqueño Wednesday, April 19, 20232323
Statistics
• Hypothesis testing• Correlation analysis• Multivariate analysis• Time-series analysis• Probability functions
and inverses
Rolando V. Raqueño Wednesday, April 19, 20232424
On-line Help
• Features:– all text and graphics– hypertext index– keyword search– bookmarks– printing– create custom HTML
(WWW) help files
Rolando V. Raqueño Wednesday, April 19, 20232525
Integrated Development Tools
• Editor
• Debugger
• Compiler
Rolando V. Raqueño Wednesday, April 19, 20232626
GUI Toolkit
• Cross-platform GUI applications
• Large selection of widgets/controls
• Native look & feel
• Portable API
Rolando V. Raqueño Wednesday, April 19, 20232727
Callable IDL
• Unix Sharable Object Library
• Windows DLL
• Macintosh AppleScript support
• Integrate IDL with other programs– complete library for data analysis & display– call IDL functions from FORTRAN/C/C++– call custom functions prototyped in IDL
Rolando V. Raqueño Wednesday, April 19, 20232828
Application Distribution
• Run-time IDL licenses– IDL save/restore file– No access to the IDL prompt– Developer retains control of application– Protection options available, if desired– Embedded licensing
Rolando V. Raqueño Wednesday, April 19, 20232929
IDL Features Recap
• Choose from many display options:– XY Plots, Surfaces, Images, Volumes, etc.
• Powerful mapping capabilities
• Broad suite of math & statistics functions
• Integrated development & interface tools
Rolando V. Raqueño Wednesday, April 19, 20233030
Summary
• IDL - foremost data visualization and analysis tool
• ENVI - the tool for remote sensing
• Visible Human - an anatomical CD reference
• Research Systems - a company dedicated to customer service and support
Rolando V. Raqueño Wednesday, April 19, 20233131
IDL is just a tool (saw)UNIX is just a tool (hammer)
• Each is great for certain tasks, not as good in others.
• An image is only as useful as the ancillary data associated with it
• IDL provides visualization and image and computation
• UNIX provides fast text manipulation and general data processing (ancillary data)
Rolando V. Raqueño Wednesday, April 19, 20233232
IDL is great at...
• Visualizing data
• Array and structure manipulation
• Writing something quickly to see if it makes sense (prototyping)
• Providing a graphical user interface (GUI)
Rolando V. Raqueño Wednesday, April 19, 20233333
IDL is not the best at...
• Advanced MATRIX and mathematical methods outside of Numerical Recipes
• True color application
• Routine names that can be remembered
• Distributing “executables”
Rolando V. Raqueño Wednesday, April 19, 20233434
Personal Biases
• IDL under the UNIX environment
• Command Line IDL (vs. IDLDE)
• Above combination allows a seamless integration of strengths
Rolando V. Raqueño Wednesday, April 19, 20233535
For those who can’t wait
% idl
OR
% idlde