+2.0.0-b7 - 7/25/00
+ Finished support for dmallocxx library
+
+2.0.0-b6 - 7/22/00
+ ctsim program: improved initial size and scroll area for image
+ and projection files
+ ctsim program: added rasterization parameters, projections parameters,
+ and reconstruction parameters dialogs
+ Moved char[] static definition from header files to c++ files
+ Completely reorganized option processing in classes to improve
+ expandability and to assist ctsim graphical user interface.
+
+2.0.0-b5 - 7/17/00
+ ctsim program: Added dialog to set minimum/maximum display levels
+ Started ctsim.tex document file
+
+2.0.0-b4 - 7/13/00
+ Fixed compiler warnings at -Wall level
+ Began work on CTSim program to be graphical front-end of all functions
+ Moved current src/*.cpp to tools/*.cpp
+ Made CTSim graphical front-end's home to be src/
+
+2.0.0-b3 - 7/10/00
+ Added highly optimized backprojection method idiff3
+ Moved comparative stats to if-2 program from ifinfo
+ Fixed image display in if2img using G2 library
+ Added column-plot and row-plot options to if-2
+ Added autoselection of analytic/calculated spatial responses to SignalFilter
+ Added frequency-based preinterpolation to SignalFilter and idiff3
+ backprojection method. Currently, this technique is still under
+ development and debugging
+ Moved graphic file writing to ImageFile class from if2img program
+
+2.0.0-b2 - 7/07/00
+ Cleaned up SignalFilter class
+ Added zeropad option to pjrec
+ Added zeropad options to html and cgi files
+ Added fourier_table and rfttw filter methods
+ Added FFTW routines to use real/half-complex transformations
+
+2.0.0-b1 - 7/05/00
+ Updated trace level processing
+ Added trace level to SignalFilter
+ Fixed magnitude vs. real output bug in FFT/Fourier filter
+
+1.9.9 - 7/04/00
+ Fixed const issue with ImageFileArray
+ Fixed Array2dFile::labelsCopy()
+ Added copy constructor and assignment for Array2dFileLabel class
+ Added Timer to if-2.cpp and ifinfo.cpp
+ Added beginning of frequency-based (DFT & FFT) filter to SignalFilter
+ Added option processing for filter-method for pjrec to choose
+ between convolution, dft, & fft filtering
+ Fixed format string for EZPlot so axis labels now print
+ Added support for FFTW library
+
+1.9.8 - 6/27/2000
+ Rewrote Array2dFile class to be non-templated
+ Rewrote Array2dFile class to make reads and writes atomic. No disk files are kept open.
+ Rewrote Array2dFileLabel class to make members private, added access routines
+ Removed timedate.cpp in favor of standard C library time/date functions
+ Renamed ctrec to pjrec, sample-ctrec.sh to sample-ctsim
+ Added signature tag and creation date/time to projection files
+
+1.9.7 - 6/25/2000
+ Standardized string option processing by classes. All classes use character strings
+ to select options rather than numeric constants. Added fail() and failMessage()
+ methods to verify that objects are created correctly by character strings.
+ Hid C++ assignment and copy constructors in classes that should not have assignment/copy
+ Rewrote ImageFile class
+ Started support for dmallocxx library, not finished
+ Added G.T. Herman image comparision statistics to ifinfo (see imagefile.cpp)
+ Updated ifinfo to show comparative statistics
+ Added printLabels() to Array2dFile class
+ Added printStatistics() to ImageFile class
+
+1.9.6 - 6/22/2000
+ Moved conversion filter name/id to Filter class
+ Moved conversion backprojection name/id to Backproj class
+ Added MPI broadcasting of strings
+
+1.9.5 - 6/21/2000
+ Merged proj_reconstr into class Projections
+ Used auto_ptr in Projections::reconstruct to make sure destructor is always called
+ Code cleanup in projections.cpp
+ Moved conversion of phantom names/id to Phantom class
+
+1.9.4 - 6/20/2000
+ Converted projection files to C++ library with frnetorderstream
+ Converted image files to C++ library with frnetorderstream
+ Converted filter and convolution to object-oriented code
+ Changed default image file to float from double -- Changable in imagefile.h
+ Optimized image file writing on little-endian architectures
+ Updated README and INSTALL
+
+1.9.3 - 6/19/2000
+ Reorganized source files
+ MPI bug fixed to phm2pj.cpp
+
+1.9.2 - 6/18/2000
+ Reorganized include files
+ Fixed const pointers in strfuncs
+
+1.9.1 - 6/16/2000
+ Renamed directories, moved source files, combined source files
+ to change from 6 libraries to 3 libraries (libctsim, libctsupport,
+ and libctgraphics)
+
+1.9.0 - 6/15/2000
+ Skip versions to make version 2.0 the first fully C++ version
+ Renamed Raysums to Projections throughout files
+ Renamed Detector to Scanner
+ Converted Scanner and Projecions to full object-oriented
+
+0.6.1 - 6/12/2000
+ Converted Phantom and PhantomElements to Object-Oriented
+ Converted Detector to Object-Oriented
+
+0.6.0-b3 - 6/10/2000
+ Improved Integer backprojection method
+ Fixed nearest neighbor to be truly nearest neighbor
+ Made linear interpolation more integer arithmetic -> speed improvement
+ Finished converting all C files to C++
+ Converted all use of malloc/free to C++ new/delete
+ Began object-oriented conversion of Phantom and Projection structures
+
+0.6.0-b2 - 6/8/2000
+ Converted MPI data structures to C++ object
+ Made ImageFile directly inherit from Array2dFile
+
+0.6.0-b1 - 6/6/2000
+ First C++ conversions
+ Portable IF (image file) format implemented with objects (SDF removed)
+ - Now all data files are cross-platform compatible
+ Converted from MPI to MPI++
+ Converted backprojection to object-oriented
+ Removed MTX from libkmath as no longer need -- replaced with C++ matrices
+
+0.5.4 - 6/4/2000
+ Simpilifed endian handling
+
+0.5.4-b3 - 6/1/2000
+ Added support for 64-bit (IA64) CPU
+ Removed broken B-spline interpolation
+ Added support for cygwin platform under Windows 2000
+ Added support for 16-bit PNG graphics
+
+0.5.4-b2 - 5/16/2000
+ Added compile-time configuration of endian order
+
+0.5.4-b1 - 5/14/2000
+ Modified the raysum file format to be platform independent
+
+0.5.3 - 5/11/2000
+ Added Microsoft VC compatibility
+ Cleaned up compilation warnings in libgraph
+
+0.5.2-b5 - 5/7/2000
+ Continued conversion to ANSI C
+ Removed old CRT routines
+
+0.5.2-b4 - 5/4/2000
+ Renamed pictures to phantoms, objects to phantom elements
+ Continued code cleanup
+
+0.5.2-b3 - 4/30/200
+ More code cleanup with reorganizing libraries
+ Added --log and --exp to sdf-1
+ Allowed negative numbers for window levels in CGI interface
+
+0.5.2-b2 - 4/30/200
+ Continued code cleanup
+
+0.5.2-b1 - 4/29/2000
+ Fixed a few MPI bugs
+ Better documented, coded raysum in-memory on on-disk options
+