/**
\page History
\section history History
<pre>
 
2005-01-04 version 1.0.0 V Oikonen, C Laakkonen, R Kln, J Johansson
  Former libpet, the common PET C library, has been divided up in smaller
  sublibraries that each handle a specific task. This library includes
  functions utilised in image processing.
2005-04-21 1.0.1 JJ
  Changes in files libtpcimgpv.c and .h:
  Functions libtpcimgp_print_readme(), libtpcimgp_print_history(),
  libtpcimgp_print_dreadme() and libtpcimgp_print_dhistory()
  are used for getting the Readme and History messages for the libtpcimgp,
  with and without Doxygen style tags. Remember to update the
  functions to get correct Readme and History messages!
  Function libtpcimgp_print_build(), is used for getting the build
  information.
2005-04-26 1.1.0 JJ
  Compiled with MinGW.
  Changes made in class point:
  round() -> pRound() (conflict with math.h round())
  PI = value -> \#ifndef PI = value \#endif
2005-06-02 1.1.1 Kaisa Sederholm
  mestim.c added 
2005-06-09 1.2.0 KS
  files median.c, lms.c, lts.c ans mestim.c removed and added to
  libtpcmodel library
2006-06-19 1.2.1 KS
  Functions imgMatchMatrix and imgMatchHeader were added to imgproc.c.
2006-08-08 1.3.0 KS
  imgfilter.c containing functions for Gaussian filtering was added.
2006-10-30 1.3.1 VO
  imgthrs.c was added.
2007-02-02 1.3.2 VO
  Max and min search functions moved into libtpcimgio.
  Added more functions for comparing IMG contents.
2008-07-14 1.3.3 VO
  imgDeleteFrameOverlap() rewritten, previous version saved as *_old().
  Added function imgCutoff()
2009-02-03 1.3.4 VO
  Added functions imgExistentTimes() and imgThresholdingLowHigh().
  Function imgFrameIntegral() sums data if frame times are all zeroes;
  therefore imgThresholding() works also in those cases.
  Function imgThresholdTemplate() also works with preset template.2009-02-04 1.4.0 VO
  imgsegm.c was added, including functions for flexible segmentation.
2009-04-30 1.4.1 VO
  Bug corrected in imgExistentTimes().
2009-08-21 1.4.2 VO
  Added functions imgThresholdTemplateCount() and imgConvertUnit().
2009-12-29 1.4.3 VO
  Additions in imgfilter.c and imgfilter.h.
  Addition in imgmatch.c and imgmatch.h.
2010-11-30 1.4.4 VO
  Added function img2cube() in imgtransform.c and .h.
2011-09-09 2.0.0 VO
  Changes to compile, install and distribute in 64-bit systems.
2012-02-17 2.0.1 VO
  Tiny changes to compile with new libtpcimgio version.
2012-04-22 2.0.2 VO
  Bug fix in imgGaussianFilter().
2012-09-21 2.0.2 VO
  Fixed typos in function descriptions; version number not changed.
2012-09-21 2.0.3 VO
  Applied defines IMG_DC_UNKNOWN, IMG_DC_CORRECTED and IMG_DC_NONCORRECTED.
2012-10-26 2.0.4 VO
  Added imgtiff.c and imgtiff.h.
2012-11-07 2.0.5 VO
  Updated imgFrameIntegral().
  Function interface changed in imgarithm.c and imgarithm.h.
2012-11-13 2.0.6 VO
  Small changes in imgGaussianFilter(), not affecting results.
2012-12-13 2.0.7 VO
  imgGaussianFilter() and imgConvolute2D() verify that kernel size
  is smaller than 2*image_dim+1.
2012-12-20 2.0.8 VO
  imgGaussianFilter() has two new parameters, image plane and frame.
2013-02-08 VO
  imgGaussianFilter() has more test prints.
2013-03-07 2.0.9 VO
  Additional functions in imgflip.c and .h.
2013-03-08 2.0.10 VO
  Additional functions in imgfilter.c and .h.
2013-04-02 2.1.0 VO
  Moved imgmatch.c and .h to libtpcimgio.
2013-04-04 2.1.1 VO
  Function imgExistentTimes() is moved to libtpcimgio.
2013-07-08 2.1.2 VO
  IMGUNITs replaced by CUNITs.


</pre> 
 */
