ReSe Applications LLC provides scientific pre-processing software for remote sensing images.

PARGE® Application Features

PARGE: Overview | Background | Features | Method | Results | Screenshots

PARGE® is a flexible system and versatile workbench for parametric ortho-rectification of airborne scanner data. The following features are included:


  • consistent and open data structure for any airborne imaging instruments,
  • support for whiskbroom, pushbroom, and any non-standard / tilted sensor model,
  • import filters for standard hyperspectral file formats (e.g., AVIRIS, HyMap, DAIS, Rosis, MIVIS, Specim AISA, NEO HYSPEX, Resonon Pika, Headwall Hyperspec®),
  • import and synchronization capabilities for attitude and GPS navigation data,
  • DEM standard import, resizing, and resampling options,
  • fully IDL (Interactive Data Language, Exelis Inc.) based and therefore operating system independent application, and
  • outputs to standard ENVIª (Harris/Exelis Inc.) file formats.

Auxiliary data functions

  • consideration of sensor attitude and navigation data by image line,
  • coordinate conversion (includes standard conversion to common coordinate systems and local datums),
  • exact correction of roll, pitch and true heading distortions,
  • ground control point (GCP) based algorithms for boresight calibration,
  • orthophoto matching option to retrieve GCPs automatically,
  • integration of dual instrument configurations,
  • options for flightpath approximation, roll/pitch interpolation, or drift correction from GCPs, and
  • options for roll compensation, and roll-based data stream post-synchronization.

Processing options

  • orthorectification algorithm for flat or rugged terrain,
  • output to arbitrary resolution and extent,
  • processing of dual sensor systems to common reference grid,
  • optional output to rotated coordinate system according to flight direction,
  • mosaicking of rectified outputs,
  • inverse transformation capability (for DEM transformation to scan geometry),
  • variety of resampling options for cartographic cube generation (selection of nearest neighbour or bilinear interpolation methods),
  • batch processing support through the availability of an open data format and scripting environment,
  • optional scan angle outputs of sensor zenith, sensor azimuth, and pixel distance for BRDF processing and atmospheric correction,
  • ENVI image geometry map (IGM) and geolocation table (GLT) output,
  • tiled processing for large datasets, and
  • RGB/grayscale visualization image creation (TIFF/JPEG/ENVI)

Supporting Abilities

  • quality control tools for geometric and radiometric accuracy,
  • comprehensable workbench interface,
  • history tracking and batch-logfile storage,
  • processing status management with the ability to store, restore and view the current progress of work,
  • on-line help system and detailed user manual,
  • web-based support and upgrading option, and
  • various preview and display options.

Technical Requirements

  • IDL Version 8.4 and higher or ENVIª developer version 5.2 or free IDL Virtual Machine
  • ENVIª license recommended, but not a condition,
  • Linux, Windows, or MacOSX (recommended: Linux 64bit system)
  • RAM: 6-10 times size of processed image array allocated to IDL, and
  • Disk: size of output * (number of bands + 6) for geocoded cube output (assuming integer data type of input imagery).

Support and Customizing

  • Introduction of user specified sensors and data formats is possible by specific filters
    (Please contact ReSe for further information on how to introduce your sensor into PARGE®),
  • Support includes updates, bug fixes and e-mail support for fully licensed users.