If you would send me a copy of the tps file and the lists of landmarks that 
should be straight, I could try to see what the problem is. 

Note that the program assumes a very simple bend that can be approximated by a 
simple quadratic curve. Having a more complex bend or having the points out of 
order will undoubtedly confuse the program.  It seemed appropriate for a 
project with Mike Bell and was shared in case it would help others.  It was not 
intended as a general solution to correcting for complex deformations of very 
elongated shapes like those of snakes or eels. Perhaps a method could be 
developed by fitting a spline but I would worry that the resulting 
morphometrics would be strongly influenced by the particular choices of splines 
or other functions. Simpler to deal with rigid structures in good condition!


F. James Rohlf                                    
Distinguished Professor, Emeritus and Research Professor
Depts: Anthropology and Ecology & Evolution
Stony Brook University
On 4/2/2022 11:14:30 AM, Dan Sinopoli <[email protected]> wrote:
Hi All,

I am trying to use the 'unbend' function on tpsUtil to straighten dorsally bent 
fish specimens. After getting the function to successfully read my input files, 
I found that when I reopened the my file with the 'straightened' landmarks they 
were all shoved into the bottom left corner of all of my photos. Any help would 
be appreciated.

Thanks,

Dan 
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