Re: [APML]: Kodak E100SW

["Tom Krajci" <krajcit@det5wg57.barksdale.af.mil>]

> From:          mark.kaye@sympatico.ca
 
>    OK, I have spent an hour at the quiding eyepiece and have achieved a 
> finely framed picture, but the exposure has obviously suffered from 
> differential flexure.  Is there a way to process this image so that one 
> moves all of the pixels sideways along the path of the flexure to make 
> the star images into points again?  If this was appplied evenly to the 
> whole image, could a good image be obtained from this otherwise ruined 
> picture, a sort of track and accumulate done on a single frame of film?

Theoretically one could do it by manipulating it in the frequency 
domain (with fourier transform techniques).  All it takes is software 
that can:  FFT the image from the spatial domain into the freq. 
domain, apply a convolution algorithm to remove the image motion 
(some experimentation and image analysis will be needed to find the 
best convolution) , and inverse FFT the image back to the spatial 
domain.

Hmmm, it'll also take the skill to manipulate this software.  When 
you get results, please post your techniques to this list.  We could 
all learn from this.

However, as much misery it is to track down and eliminate 
differential flexure, I recommend doing this instead of the FFT/image 
processing approach.

Tom Krajci

Capt Tom Krajci
B-52 Intelligence Officer
"In God we trust, all others we monitor!"
http://spur.barksdale.af.mil