---
name: "cmtk-streamxform"
section: "1"
platform: "linux"
package: "cmtk"
version: "3.3.1p2+dfsg-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/cmtk-streamxform"
---

# cmtk-streamxform(1)

Apply coordinate transformation to point coordinates from text stream.

## NAME

streamxform - Apply coordinate transformation to point coordinates from text stream.

## SYNOPSIS

**streamxform** XformList

## DESCRIPTION

An ASCII-format list of point coordinates is read from standard input and a user-provided sequence of coordinate transformations (each optionally inverted) is applied to them. The transformed points are then written to standard output.

## OPTIONS

### Global Toolkit Options (these are shared by all CMTK tools)

- **--help**

  Write list of basic command line options to standard output.

- **--help-all**

  Write complete list of basic and advanced command line options to standard output.

- **--wiki**

  Write list of command line options to standard output in MediaWiki markup.

- **--man**

  Write man page source in 'nroff' markup to standard output.

- **--version**

  Write toolkit version to standard output.

- **--echo**

  Write the current command line to standard output.

- **--verbose-level** *\<integer\>*

  Set verbosity level.

- **--verbose**, **-v**

  Increment verbosity level by 1 (deprecated; supported for backward compatibility).

- **--threads** *\<integer\>*

  Set maximum number of parallel threads (for POSIX threads and OpenMP).

### Transformation Options

- **--affine-only**

  Apply only the affine component of each transformation (or its inverse, if specified) in the given series, even if the actual transformation is nonrigid.

- **--inversion-tolerance** *\<double\>*

  Numerical tolerance of B-spline inversion in mm. Smaller values will lead to more accurate inversion, but may increase failure rate. **\[Default: 1e-08\]**

### Output Options

- **--separator** *\<string\>*

  Field separator - this string or character is used to separate x, y, and z coordinates from each other, and z from the remainder of every line. **\[Default:   \]**

- **--precision** *\<integer\>*

  Floating point precision for output file. **\[Default: 9\]**

### Image Space Options

- **--source-image** *\<string\>*

  Set source image of the transformation (i.e., the image that the transformation maps points FROM) to correct for differences in orientation and coordinate space. **\[Default: NONE\]**

- **--target-image** *\<string\>*

  Set target image of the transformation (i.e., the image that the transformation maps points TO) to correct for differences in orientation and coordinate space. **\[Default: NONE\]**

## AUTHORS

Torsten Rohlfing, with contributions from Michael P. Hasak, Greg Jefferis, Calvin R. Maurer, Daniel B. Russakoff, and Yaroslav Halchenko

## LICENSE

http://www.fsf.org/licensing/licenses/gpl.html

## BUGS

Report bugs at http://nitrc.org/projects/cmtk/

## ACKNOWLEDGMENTS

CMTK is developed with support from the NIAAA under Grant AA021697, National Consortium on Alcohol and Neurodevelopment in Adolescence (N-CANDA): Data Integration Component. From April 2009 through September 2011, CMTK development and maintenance was supported by the NIBIB under Grant EB008381.