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MINCMATH(1) MINC User's Guide MINCMATH(1)
NAME
mincmath - perform simple math operations on minc files
SYNOPSIS
mincmath [<options>] <in1>.mnc [<in2>.mnc...] <out>.mnc
DESCRIPTION
Mincmath will perform simple, voxel-by-voxel math operations, on one or
more minc files of the same shape and having the same coordinate
sampling, producing a single output file. Operations can be unary
(operate on one file), binary (two input files) or cumulative (operate
on two or more input files). Cumulative operations can also be
performed across a specified dimension of the input files.
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
-2 Create a MINC 2.0 format output file.
-clobber
Overwrite an existing file.
-noclobber
Don't overwrite an existing file (default).
-no_clobber
Synonym for -noclobber.
-verbose
Print out progress information for each chunk of data copied
(default).
-quiet Do not print out progress information.
-debug Print out debugging information.
-filelist filename
Specify a file containing a list of input file names. If "-" is
given, then file names are read from the standard input. If this
option is given, then there should be no input file names
specified on the command line. Empty lines in the input file are
ignored.
-copy_header
Copy all of the header information from the first input file
(default for one input file).
-nocopy_header
Do not copy all of the header from the first input file; copy
only coordinate information (default for more than one input
file).
-filetype
Create an output file with the same type as the first input file
(default).
-byte Store output voxels in 8-bit integer format.
-short Store output voxels in 16-bit integer format.
-int Store output voxels in 32-bit integer format.
-long Superseded by -int.
-float Store output voxels in 32-bit floating point format.
-double
Store output voxels in 64-bit floating point format.
-signed
Use signed, two's complement integer format. Applies only if the
output voxel type is specified to be an integer type (one of
-byte, -short, -int or -long).
-unsigned
Use unsigned integer format. Applies only if the output voxel
type is specified to be an integer type (one of -byte, -short,
-int or -long).
-range min max
Restrict the valid range of integer data. Applies only if one
of the -byte, -short, -int or -long options is specified.
-max_buffer_size_in_kb size
Specify the maximum size of the internal buffers (in kbytes).
Default is 4096 (4MB).
-dimension dimname
Specify a dimension along which we wish to perform a cumulative
operation.
-check_dimensions
Check that all input files have matching sampling in world
dimensions (default).
-nocheck_dimensions
Ignore any differences in world dimensions sampling for input
files .
-propagate_nan
Invalid data (Not-A-Number or NaN) at a voxel in any of the
input files will produce invalid data in the output file at that
voxel (default).
-ignore_nan
For cumulative operations, invalid data (NaN) in an input file
is ignored, ie. treated as though it is not present.
-nan When an illegal operation is attempted at a voxel (such as
divide by zero), invalid data (NaN) is stored in the output file
(default). Having no valid input data for a cumulative operation
is also considered an illegal operation when -ignore_nan is
used.
-zero When an illegal operation is attempted at a voxel (such as
divide by zero), value zero is stored in the output file.
-illegal_value value
When an illegal operation is attempted at a voxel (such as
divide by zero), the specified value is stored in the output
file.
Options for specifying constants
-constant value
Specify a single constant.
-const value
Synonym for -constant.
-const2 value1 value2
Specify two constants.
Operations
-add Cumulatively add two or more volumes, or add a volume and a
constant.
-sub Subtract two volumes or a volume minus a constant.
-mult Cumulatively multiply two or more volumes, or multiply a volume
and a constant.
-div Divide two volumes or a volume divided by a constant.
-invert
Calculate 1/x at each voxel, where x is the input voxel value.
If a constant c is specified (with -constant), then calculate
c/x at each voxel.
-sqrt Calculate the square root of a volume.
-square
Calculate the square of a volume.
-abs Calculate the absolute value of a volume.
-maximum
Calculate the maximum of a series of volumes.
-minimum
Calculate the minimum of a series of volumes.
-exp Calculate c2*exp(c1*x) at each voxel of a volume, where x is the
voxel value and c1 and c2 are constants specified by -constant
c1 or -const2 c1 c2. The default value for these constants is
1.0.
-log Calculate log(x/c2)/c1 for each voxel of a volume, where x is
the voxel value and c1 and c2 are constants specified by
-constant c1 or -const2 c1 c2. The default value for these
constants is 1.0.
-scale Scale a volume either by multiplying by a single constant (use
-constant) or by multiplying by the first constant and adding
the second (use -const2).
-clamp Clamp a volume to lie between two values specified with -const2.
-segment
Segment (binarize) a volume so that values within the range
specified by -const2 give value 1 and those outside it give
value 0.
-nsegment
Opposite of -segment: values within the range specified by
-const2 give value 0 and those outside it give value 1.
-percentdiff
Calculate the percent difference between two volumes (normalized
to the first volume). If the first volume is less than a
threshold (or zero), then the value specified by -nan or -zero
is used. The threshold is specified using -constant, with a
default of zero.
-pd Synonym for -percentdiff.
-eq Test for equality of two volumes or a volume and a constant.
Values are rounded to the nearest integer before performing the
test. Output 1 for true and 0 for false at each voxel.
-ne Test for inequality of two volumes or a volume and a constant.
Values are rounded to the nearest integer before performing the
test. Output 1 for true and 0 for false at each voxel.
-gt Test for volume 1 > volume 2 or a volume > a constant. Output 1
for true and 0 for false at each voxel.
-ge Test for volume 1 >= volume 2 or a volume >= a constant. Output
1 for true and 0 for false at each voxel.
-lt Test for volume 1 < volume 2 or a volume < a constant. Output 1
for true and 0 for false at each voxel.
-le Test for volume 1 <= volume 2 or a volume <= a constant. Output
1 for true and 0 for false at each voxel.
-and Test for volume 1 && volume 2 or a volume && a constant. Values
are rounded to the nearest integer before performing the test.
Output 1 for true and 0 for false at each voxel.
-or Test for volume 1 || volume 2 or a volume || a constant. Values
are rounded to the nearest integer before performing the test.
Output 1 for true and 0 for false at each voxel.
-not Perform logical negation on a volume: convert non-zero to zero
and zero to one. Values are rounded to the nearest integer
before the negation.
-isnan Test a volume for invalid values (NaN). Output 1 for invalid
values and 0 for valid values.
-nisnan
Opposite of -isnan. Output 0 for invalid values and 1 for valid
values.
-count_valid
Count the number of valid voxels across a series of volumes. If
none of the volumes has valid data, then zero is written out
(ie. -zero and -ignore_nan are always assumed, unlike other
cumulative operations).
Generic options for all commands:
-help Print summary of command-line options and exit.
-version
Print the program's version number and exit.
AUTHOR
Peter Neelin
COPYRIGHTS
Copyright (C) 1995 by Peter Neelin
SEE ALSO
minccalc(1)
$Date: 2004-05-20 21:52:08 $ MINCMATH(1)