ACCORD is a C library for composition of SEM or scanning helium-ion microscope images with correction of drift. It is able to compose (average) large sets of extremely noisy images that were acquired by scanning charged-particle microscopes at the highest possible speeds (lowest pixel-dwell times). If the images are composed using traditional techniques, they usually become extensively blurry. The technique that is implemented in this software corrects these derogations by pre-shifting the composed frames.
The detailed theory is in Cizmar P. et al: Real-Time Scanning Charged-Particle Microscope Image Composition with Correction of Drift.
For a brief guide how to work with the qACCORD (GUI application), see Brief qACCORD Guide.
Automatic Processing of Movies with cACCORD describes how to automatically process videos from SEMs with ACCORD.
The distribution packages contain the ACCORD library, caccord console application, and qaccord GUI application.
All packages are available for Linux (binary .tgz and .sh packages), Windows (Windows installer) and Mac OS X. All can be downloaded from sourceforge.
Add the following lines to your /etc/apt/sources.list file:
deb http://artimagen.cizmar.org squeeze main deb-src http://artimagen.cizmar.org squeeze main
Add the key:
wget -q http://artimagen.sourceforge.net/petrcizmar.key -O- | sudo apt-key add -
Update your package database:
apt-get install caccord apt-get install qaccord
For development package also:
apt-get install libaccord-dev
It is also possible to download individual .deb files from http://artimagen.cizmar.org/pool/main/a/accord/
The sources package is also available from sourceforge.
ACCORD uses cmake to build Makefiles, not autotools. The procedure to install follows:
tar xvf accord-sources-X.X.tgz cd accord mkdir build cd build cmake -i .. make && make install
Current development sources are available using git :
git clone git://accord.git.sourceforge.net/gitroot/accord/accord
Even if one does not have an SEM, or access to any “super-fast” images, it is possible to test the software with testing artificial images. They are available from sourceforge file repository. These images were generated by ARTIMAGEN.
Please file bugs and feature requests to Sourceforge tracker.
All inputs will be greatly appreciated.
The doxygen-based docs are available at: http://accord.sf.net/docs
As this software was developed as part of work done by the United States Government, it is not subject to copyright, and is in the public domain. Note that according to gnu.org public domain is compatible with GPL.
“This software was developed at the National Institute of Standards and Technology by employees of the Federal Government in the course of their official duties. Pursuant to title 17 Section 105 of the United States Code this software is not subject to copyright protection and is in the public domain. Each of these packages is an experimental system. NIST assumes no responsibility whatsoever for its use by other parties, and makes no guarantees, expressed or implied, about its quality, reliability, or any other characteristic. We would appreciate acknowledgement if the software is used. This software can be redistributed and/or modified freely provided that any derivative works bear some notice that they are derived from it, and any modified versions bear some notice that they have been modified.”