It seems to me that a good measure of astronomical seeing is by using the Fourier Transform spectrum of the position of a random pixel as a function of time from in a movie - eg amplitude and frequency content - low amplitude good and low frquency good and so-on. I could do this if I could understand the format of an avi-file - ie extract the information and then FT it.
Surely a simple task to someone familiar with avi files ?
Any thoughts ?
seeing by Fourier Transform
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Re: seeing by Fourier Transform
Hi,
SharpCap already has a Fourier based focus score tool that measures the strength of the higher spatial frequencies in transform.
If you wanted to write something like this yourself then I'd suggest either finding a library in your favourite programming language to read AVI files (they are very complex - you don't want to write this from scratch) or to work with SER files instead which are much simpler - http://www.grischa-hahn.homepage.t-online.de/astro/ser/
Robin
SharpCap already has a Fourier based focus score tool that measures the strength of the higher spatial frequencies in transform.
If you wanted to write something like this yourself then I'd suggest either finding a library in your favourite programming language to read AVI files (they are very complex - you don't want to write this from scratch) or to work with SER files instead which are much simpler - http://www.grischa-hahn.homepage.t-online.de/astro/ser/
Robin