[Insight-users] root mean square error

[Boettcher, Dr. Peter]

Dear all

 

As a measure of fit of two 3D surfaces I calculate the absolute distance from each point of surface1 to the closes point on surface2 like we would using a ICP algorithm. Finally I calculate the mean of those distances. 

 

1.	The term Euclidian distance which appears in the literature is not clear to me. What is the difference to distance between two points in 3D space or is it just a question of terminology?
2.	The metric I calculate doesn't seem to be different to what is called root mean square error - or am I wrong? In case I am wrong what would you call the metric I described? What would be the difference performing registration with this metric and RMSE unsing non corresponding point sets?

 

Many thanks - Peter.

 
------------------------------------
Peter Böttcher, Dr med vet, DipECVS
European Veterinary Specialist in Surgery
Fachtierarzt für Kleintierchirurgie
Klinik für Kleintiere 
Universität Leipzig 
An den Tierkliniken 23 
D-04103 Leipzig (Germany)
Tel: +49-341-9738700 
Fax: +49-341-9738799
email: boettcher at kleintierklinik.uni-leipzig.de

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.itk.org/pipermail/insight-users/attachments/20090829/140eed94/attachment.htm>