What's New in AIR 3.08

AIR 3.08 fixes the following bugs

• A bug that could crash 2D registrations when using the scaled least squares cost function with alignlinear
• A bug that could potentially lead to inaccurate convergence behavior with high order nonlinear models in align_warp
• Bugs that prevented reslice_warp and scan_warp from reading linear .air files correctly
• Code for the program scan_warp is now much shorter with no substantive changes in its function.

AIR 3.07 fixes a bug in the program manualreslice that was introduced in AIR 3.05

AIR 3.06 fixed a pair of bugs in align.c that could crash alignlinear in some circumstances

AIR 3.05 included the following changes

• The AIR.h configuration file has been modified and some of the defaults changed
• The programs reslice and reslice_warp now allow substitution of an alternate reslice file (-a flag).
• The program alignlinear can now create a termination file properly formatted for use with align_warp (-w and -ws flags).
• The program resize can now optionally create a .air file describing its actions.
• The -x flag in align_warp has been changed to -d to avoid confusing its function with the unrelated -x flag in alignlinear.
• The AIR package should now port to PC's and Macintoshes with minimal modification.
• Several bugs have been fixed, including a bug that caused align_warp to crash.
• It should now be easier for C programmers to change the native file format used by AIR.
• The old AIR 1.0 programs (alignpettopet, alignmritopet, and alignpettomri) have been eliminated from the distribution. Their functionality has been completely subsumed by alignlinear.

AIR 3.04 was not publicly released. Its changes are included in the AIR 3.05 list.

AIR 3.03 fixed two minor bugs

• A bug that could produce problems in the 2D scaled least squares cost functions of alignlinear
• A bug that can result in no data in the last plane when reslicing a file that has been aligned to itself.

AIR 3.02 included the following changes:

• The command file 'MAKE.com' for compiling AIR now accepts an argument listing the directory into which the compiled programs should be installed.
• An error n the Tcl/Tk GUI interface 'align_warp.tcl' has been corrected. This program now applies all lower order models before proceeding to the selected high order model.
• The program 'sizeof' has been modified to include the following new features:
  • It prints out the AIR version number (e.g., 3.02).
  • It prints out relevant data on how the AIR.h file was configured at compile time.
  • It tests for conflicts that could cause problems with AIR.
  • It attempts to compute the machine radix.
• A bug in the program 'reconcile_rigidbody' which rendered it unusable has been fixed.
• Several modifications have been made to circumvent platform specific problems with AIR.
  • Bit-shifting has been replaced with normal multiplication and division.
  • Division by zero is explicitly avoided to prevent crashes on some machines.
  • The names of some routines have been shortened or changed to prevent conflicts.
  • Machine radix is now specified in AIR.h instead of being computed by a routine that can fail on some platforms.
  • Memory for certain subroutines is now allocated by the calling routine to reduce local data storage.
• Minor bug fixes are included.

© 1995-98 Roger P. Woods, M.D.(rwoods@ucla.edu)