NAME¶
mincblob - calculate blobs from minc deformation grids
SYNOPSIS¶
mincblob [<options>] <in1>.mnc
DESCRIPTION¶
mincblob will calculate simple statistical metrics of a minc deformation
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 different
estimates of local volume change the third is a measure of how consistent
movement is in a direction but without a local change in volume. 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 calculation 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) Dilation 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 partial derivatives in all three directions.
- -determinant
- This computes the same metric as -trace but with greater accuracy 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 © 2000 by Andrew Janke
Man page: Copyright © 2001 by Peter Neelin