xform2itk(1)

💅 xform2itk — like, the manual page, bestie

okay so you found xform2itk(1) from The Computational Morphometry Toolkit and you're like "what is this" — don't worry, I got you. Sit down, hydrate, let's go. 🫶

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✨ NAME ✨

xform2itk — Convert affine transformations to ITK format.

That's it. That's the whole job. She converts. She's an icon. 👑

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🦋 SYNOPSIS 🦋

xform2itk InputPath OutputPath

Two paths, in and out, no cap. In goes the thing, out comes the other thing. ✨

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🌸 DESCRIPTION 🌸

So here's the tea, bestie: this tool converts coordinate transformations from CMTK format to ITK format. But that's not even the whole slay — while she's doing that, she also corrects for differences in image coordinate conventions. Like, two coordinate systems walk into a bar and she's the one making them agree. It's giving ✨diplomat✨. Literally.

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💖 OPTIONS 💖

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

shared by literally every CMTK tool, so you only have to learn them once. main character energy fr fr.

• --help — writes the list of basic command line options to standard output. baby's first help. 🍼
• --help-all — writes the complete list of both basic AND advanced command line options to standard output. go big or go home. 🔥
• --wiki — writes the list of command line options to standard output in MediaWiki markup. for the wiki girlies. 📝
• --man — writes man page source in nroff markup to standard output. yes, the very markup you're reading (the vibe of it, anyway). 💀
• --version — writes the toolkit version to standard output. proof of her credentials. ⭐
• --echo — writes the current command line to standard output. she repeats you back, affectionately. 🦜
• --verbose-level <integer> — sets the verbosity level. pick a number, any number (an integer though). 🙈
• --verbose, -v — increments the verbosity level by 1. ⚠️ deprecated — she's only still doing this for backward compatibility. like, she's moved on but she'll still text back. 😭
• --threads <integer> — sets the maximum number of parallel threads (for POSIX threads and OpenMP). more threads, more multitasking, more ✨chaos✨.

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🎀 Input parameters 🎀

• --fixed-space <string> — changes the fixed image coordinate space (e.g., 'RAS', 'LPS', ...). this defaults to ITK standard space. [Default: LPS] 💜
• --moving-space <string> — changes the moving image coordinate space (e.g., 'RAS', 'LPS', ...). this also defaults to ITK standard space. [Default: LPS] 🌈
• --invert-input — inverts the input transformation before conversion. flip it and reverse it. 🔄

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🍓 Output parameters 🍓

• --fixed-image <string> — overrides the transformation's fixed/reference image (if any) with this one. [Default: NONE] 🙈
• --moving-image <string> — overrides the transformation's moving/floating image (if any) with this one. [Default: NONE] 🧚

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💜 AUTHORS 💜

Torsten Rohlfing, with contributions from Michael P. Hasak, Greg Jefferis, Calvin R. Maurer, Daniel B. Russakoff, and Yaroslav Halchenko. a whole squad. a whole committee. we stan a collaborative effort. 🫶

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🌺 LICENSE 🌺

http://www.fsf.org/licensing/licenses/gpl.html — yeah, GPL, go read it, she's licensed and she's proud. 📜

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💀 BUGS 💀

Report bugs at http://nitrc.org/projects/cmtk/. not me manifesting bug reports but also... please do, she wants to be better. 😭

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⭐ 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. screaming, crying, funded, thriving. 🎀

no cap: every flag, default, path and number above is straight from the source. she's cute AND accurate. that's the whole point. 💅

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okay so that's the page!! go convert your affine transformations and correct those coordinate convention differences like the icon you are. ✨🦋🌸

this was CMTK 3.3.1p2, dated Jun 24 2026, and honestly? timeless. periodt. 💖