[Insight-users] Translation, Rotation and Scaling

[Yang, Jinzhong]

This is simply an affine transform itk::AffineTransform. 

 

-Jinzhong

 

From: insight-users-bounces at itk.org [mailto:insight-users-bounces at itk.org]
On Behalf Of John D
Sent: Friday, September 04, 2009 10:57 AM
To: Ramón Casero Cañas
Cc: Insight Users Mailing List
Subject: Re: [Insight-users] Translation, Rotation and Scaling

 

Hi Ramon,

  Thanks for your reply. I see that the Similarity2DTransform has an uniform
scaling in X and Y. In my application, the x and y scaling could be
different. How can that be handled ?

Thanks,
John



2009/9/3 Ramón Casero Cañas <ramon.casero at comlab.ox.ac.uk>

John D wrote:

Hi all,

 I am working on an application of registration of 2D images where I want
translation, rotation and scaling (but no shear). The affine transformation
has the added degree of freedom for the shear that I want to avoid. Does ITK
have a transform that uses only translation, rotation and scaling ?

 

Hi John,

Yes, it is known as a similarity transform. See class Similarity2DTransform,
documented in sec. 8.8.9 (p. 400) of the ITK User Guide, and in the doxygen
documentation

http://www.itk.org/Doxygen/html/classitk_1_1Similarity2DTransform.html


Best regards,

Ramon.

-- 
Ramón Casero Cañas, DPhil

Computational Biology, Computing Laboratory
University of Oxford
Wolfson Building, Parks Rd
Oxford OX1 3QD

tlf     +44 (0) 1865 610807
web     http://web.comlab.ox.ac.uk/people/Ramon.CaseroCanas
photos  http://www.flickr.com/photos/rcasero/

 

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