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Man Pages


Manual Reference Pages  -  MINCMATH (1)

NAME

mincmath - perform simple math operations on minc files

CONTENTS

Synopsis
Description
Options
General options
Options for specifying constants
Operations
Generic options for all commands:
Author
Copyrights

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-long Superseded by -int.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 © 1995 by Peter Neelin

SEE ALSO

minccalc(1)

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MINCMATH (1) $Date: 2004-05-20 21:52:08 $

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