the er-c
gempa:: general electron micrograph processcing & analysis sofware

The Gempa software is a standalone software developed for digital image processing of electron micrographs.

Gempa is written in the IDL programming language. To use Gempa an installation of the license-free IDL virtual machine is required. IDL supported platforms are Apple Mac OS X 10.x, Intel x86 LinuX, Solaris, Microsoft Windows 7 and XP.

[A screenshot of Gempa running on Mac OS X]

the Gempa feature list contains

  • import of various image formats (Tietz .tvips, Digital Micrograph .dm3, Emispec .ser, MRC .mrc, FUJI image plate data, tif, gif, png and binary data)
  • export to Tietz .tvips, MRC .mrc, tif, gif, png, ppm, raw binary format
  • group context: images can be grouped and commands can be performed on these groups, 3D data can be loaded as image groups
  • supports various data types and arithmetics from integer to complex floating point data
  • contrast manipulation
  • FFT operations
  • geometric transformations (image rotation, scaling, cropping, mirroring, recentering)
  • image normalization
  • arious complex data type operations
  • unary and binary arithmetic image operations
  • profile extraction in cartesian or polar coordinates
  • measuring and peak fitting operations
  • region of interest statistics

availibility of the Gempa software

Gempa is available free by DOWNLOAD from this website.

author: Lothar Houben, last updated 22 October 2013.

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