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MINCBLOB(1)		       MINC User's Guide		   MINCBLOB(1)

NAME
       mincblob	- calculate blobs from minc deformation	grids

SYNOPSIS
       mincblob	[<options>] <in1>.mnc

DESCRIPTION
       mincblob	 will  calculate simple	statistical metrics of a minc deforma-
       tion grid file related to local volume change.  The  input  deformation
       grid files are typically	produced by minctracc.

       There  are  currently 4 deformation grid	metrics	to choose from:	trace,
       determinant, translation	and magnitude. The first two relate to differ-
       ent estimates of	local volume change the	third is a measure of how con-
       sistent movement	is in a	direction but without a	local change  in  vol-
       ume.  The last calcuates	the magnitude of the local deformation vector.
       These metrics are all calculated	with respect to	 a  vectors  immediate
       neighbours. No smoothing	of the field is	performed as part of this cal-
       culation	so if a	smooth results is desired input	grid files  should  be
       first smoothed or blurred.

OPTIONS
       Note that options can be	specified in abbreviated form (as long as they
       are unique) and can be given anywhere on	the command line.

General	options
       -clobber
	      Overwrite	an existing file.

       -noclobber
	      Don't overwrite an existing file (default).

       -verbose
	      Print out	extra information (more	than the default).

	      -trace Compute the  areas	 within	 the  deformation  field  that
	      equate  to volume	increase or decrease (+ve or -ve dilation) Di-
	      lation is	defined	as the trace of	the deformation	field Thus  it
	      should range between -1..1 with -1 being compression and 1 being
	      dilation.	This measure while fast	is essentially a sum  of  par-
	      tial derivatives in all three directions.

       -determinant
	      This  computes  the same metric as -trace	but with greater accu-
	      racy as the local	Jacobian matrix	is first estimated. The	 first
	      order determinant	of the Jacobian	is then	returned.

       -translation
	      Compute  the  areas  within the deformation field	that equate to
	      translation Translation is defined as: trans  =  arccos(	A.B  /
	      |A|.|B| )	* e^- (|A|-|B|)	Thus it	should range between 0..1 with
	      1	being "translation".

       -magnitude
	      Compute the magnitude of the local deformation vector.

Generic	options	for all	commands:
       -help  Print summary of command-line options and	exit.

       -version
	      Print the	program's version number and exit.

AUTHOR
       Andrew Janke

COPYRIGHTS
       Program:	Copyright (C) 2000 by Andrew Janke

       Man page: Copyright (C) 2001 by Peter Neelin

			 $Date:	2004-05-20 21:52:09 $		   MINCBLOB(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | General options | Generic options for all commands: | AUTHOR | COPYRIGHTS

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