[R] cp2tform equivalent

David Winsemius dwinsemius at comcast.net
Sun Dec 18 15:49:50 CET 2011

On Dec 17, 2011, at 2:40 PM, George Macaulay Shaw wrote:

> I'm a new R user and am looking for an R equivalent to the Matlab  
> 'cp2tform' function (see: http://www.mathworks.com/help/toolbox/images/ref/cp2tform.html) 
> .
> cp2tform accepts pairs of 2D control points and produces a least- 
> squares optimized spatial transformation from one set of points to  
> the other. Specifically, I'm looking to produce the coefficients of  
> a 3rd order polynomial transformation.

I have not been able to find a package that offers that image  
processing method. You are welcome to continue the search.


rseek : www.rseek.org/  is another search facility that some people  
like, and there is a search facility at http://tolstoy.newcastle.edu.au/R/ 
  which suffers from generating errors after modifying your searches  
after an initial set of results are offered unless you navigate back  
to its root.  but  I find Baron's engine to be my favorite.

> I'm familiar with the mathematics involved, but am very new to R. If  
> this functionality isn't implemented in R directly, a brief outline  
> of the R functions that I'd use to implement it myself would be  
> helpful.



David Winsemius, MD
West Hartford, CT

More information about the R-help mailing list