* The original command line program (pencam.c) which downloads the images from
  the usb version of the STV0680 based camera was written by Bart Hartgers 
  <bart@etpmod.phys.tue.nl>. Bart also collected the other necessary files 
  (see below) and made the whole thing work.
  
* Kevin Sisson <kjsisson@bellsouth.net> added options, such as downloading 
  an individual picture or a range of pictures, and the option of applying
  various image filters.  I also worte the pensnap program, for taking 
  snapshots at selected intervals.  These two programs were combined to 
  produce pencam2.
  
* The Bayer to RGB demosaic program (bayer.c) was taken from the driver
  for the serial version of the STV0680 based camera, used in gphoto2. This 
  driver was written by Adam Harrison <adam@antispin.org>.
  
* The original pattern recongition programs (pattrec.c) were written by Eric 
  Brombaugh <emeb@goodnet.com>.  I am now using the code (bayer_unshuffle) 
  from Adam Harrison's work.
  
* The unsharp masking program (unsharp.c) was originally written by Winston 
  Chang <winston@stdout.org>, as a GIMP plugin. It has been modified by 
  Winston Chang for use in the pencam progam.

* The information on and code for gamma correction and white balance was 
  found/developed by Alexander Schwartz <alexander.schwartz@gmx.com>.

* The sharpen filter is adapted from the Gimp plug-in, by Michael 
  Sweet <mike@eastsw.com>.  

* The saturate filter is also taken from the Gimp plug-in.  The filter was 
  (I believe) written by Spencer Kimball and Peter Mattis

* The annotate function (add_text) of pensnap is taken from the webcam 
  program, part of the xawtv suite, by Gerd Knorr.  

* The light_enhance2 auto-select light gamma correction-white balance was 
  written by Kurt Garloff <kurt@garloff.de>.
  