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# GraphicsMagick Authors

The following people have contributed substantially to the development of GraphicsMagick. Please let us know if an author is missing, or a significant contribution was made and not recorded.

- Active GraphicsMagick Contributors
- Former GraphicsMagick Contributors
- Other Contributors (via ImageMagick)
- Additional Acknowledgements

# Active GraphicsMagick Contributors

Bob Friesenhahn
  Principal maintainer of GraphicsMagick. Author of Magick++ (C++ API to ImageMagick and GraphicsMagick). Author of module loader facility, automatic file identification (magic) support, Unix/Cygwin/MinGW configure/make facility, Windows setup.exe style installer, WMF renderer, C API documentation formatter, and the C, C++, and Perl test suites used by ImageMagick and GraphicsMagick.
Glenn Randers-Pehrson
  Contributed significantly to the utilities, including writing the 'gm' utility wrapper. Authored support for JNG, MNG, and PNG formats. Provided significant support for the BMP format. Significant improvements to the documentation, including creating a documentation authoring environment based on the <imdoc> format. Maintains the SourceForge mailing lists.
Jaroslav Fojtik
  Authored the ART, CUT, MATLAB, TOPOL, and WPG coder modules.
Rolf Schroedter
  Principal author of TclMagick.
David N. Welton
  Co-author of TclMagick, particularly in the Unix environment.
Mark Mitchell
  Contributed a new design for the web pages, including the formatting scripts, and converted many pages to the new format.
Richard Nolde
  Contributed code for converting between native floating point types, and short (16/24) bit float types.
Clément Follet
  Contributed Hald CLUT and ASC-CDL implementations.
John Sergeant
  Re-wrote the HP PCL writer to work much better, including support for compression. Implemented support for CALS type 1 format. Re-wrote the DICOM reader.

# Former GraphicsMagick Contributors

Mike Chiarappa
  Created and maintains the Borland C++ Builder 6.0 build environment for GraphicsMagick.
Daniel Kobras
  Provided many security patches and fixes from the Debian project.
William Radcliffe
  Author of the VisualMagick project configure facility for Visual C++. Author of FlashPix module. Author of the ImageMagickObject COM object for Windows. Author of the EMF, XTRN, and META coders. Significant contributions to the MSL, JPEG, TIFF, SVG, and URL coders. Authored "process" module support. Wrote the micro-timer facility used by 'identify'. Ported module loader support to Windows. Significantly improved polygon rendering performance.
Leonard Rosenthol
  Authored the 'conjure' utility and associated MSL execution environment. Provided MacOS support. Authored the CLIPBOARD, XCF, and PSD coders. Postscript and PDF expertise. Significant drawing enhancements including support for dash patterns, linecap stroking, clipping masks and a mask image.
Lars Ruben Skyum
  Contributed the -clippath functionality, added -define support, improved color profile support, and re-wrote the PS3 coder.

# Other Contributors (via ImageMagick)

John Cristy
  Creator, principal author, and principal maintainer of ImageMagick, from which GraphicsMagick is originally derived (from ImageMagick 5.5.2). Also the author of the Wand API to ImageMagick which is incorporated as a stand-alone library by GraphicsMagick.
Kelly Bergougnoux
  Authored the initial Cineon coder (which has since been replaced).
Christopher R. Hawks
  Authored the PALM coder.
Francis J. Franklin
  Ported the WMF coder to the libwmf 0.2 API.
Rick Mabry
  Contributed code to support filling drawn objects using a pattern image.
Nathan Brown
  Original author of the JP2 coder.
Kyle Shorter
  Original author of PerlMagick. Original author of the LOCALE coder.
Markus Friedl
  Original author of Base64 encode/decode sources.
David Harr
  Contributed (with Leonard Rosenthol) dash pattern, linecap stroking algorithm, and minor rendering improvements.
Troy Edwards
  Authored the source RPM spec file for GraphicsMagick.
Milan Votava
  Contributed support for Wireless BitMap, used in WAP - Wireless Access Protocol.
Mike Edmonds
  Contributed the median filter algorithm.

# Additional Acknowledgements

David Pensak, E. I. du Pont de Nemours and Company
  For providing the computing environment that made developing ImageMagick possible.
Alexander Zimmermann
  Responsible for the ImageMagick Linux binary distributions for many years. His efforts are very much appreciated.
Paul Heckbert, Carnegie Mellon University
  Image resizing is based on Paul Heckbert's Zoom program.
Paul Raveling, USC Information Sciences Institute
  The spatial subdivision color reduction algorithm is based on his Img software.
Michael Halle, Spatial Imaging Group at MIT
  For the initial implementation of Alan Paeth's image rotation algorithm.
Peder Langlo, Hewlett Packard
  Made hundreds of suggestions and bug reports. Without Peder, this software would not be nearly as useful as it is today.
Rod Bogart and John W. Peterson, University of Utah
  Image compositing is loosely based on rlecomp of the Utah Raster Toolkit.
Alvy Ray Smith and Eric Ray Lyons
  HWB color transform and algorithm.
Thomas R Crimmins
  Inventor of the eight hull algorithm used for speckle reduction.

Copyright (C) 2002 - 2010 GraphicsMagick Group

This program is covered by multiple licenses, which are described in Copyright.txt. You should have received a copy of Copyright.txt with this package; otherwise see http://www.graphicsmagick.org/Copyright.html.