Re: [APML]: Image Registration

["Bobby Middleton" <bobbym@unicomp.net>]

The Astro-Photography Mailing List
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> From: Philip Perkins 
> 
> I am achieving much higher registration accuracy with PW than I did with
> PS, largely because PW automatically scales and rotates, and I found
these
> things quite hard to do in PS.  In fact it seems the only thing PW cannot

> handle is non-linear scaling errors.


Has anyone written up any articles on the technique for stacking in 
PW? I have gotten a copy of the "astro" version and am eager to try 
it since my biggest problems with stacking in PS were scaling problems.
I can only guess these problems are introduced during the scanning process,
because the sets of negatives I have tried were consecutive photos that
were framed identically. St-4 guiding was never interrupted  as a matter of
fact.   

Bobby Middleton

astropics at: http://home.unicomp.net/~bobbym/astro1.htm