Re: [APML] Gradient and Vignette removal software

[Roland Roberts <roland@astrofoto.org>]

>>>>> "Sean" == Sean Walker <swalker@SkyandTelescope.com> writes:

    Sean> Robert, I think that was my article: S&T: September 2001,
    Sean> page 116 but yes, it is tedious. Unfortunately there is no
    Sean> automated method.

I liked your article; sorry I didn't have it handy to remember the
reference and give you credit.

But there is always a median filter.  I don't think Photoshop has one,
but AIP4WIN or IRIS (free) does.  You do have to convert your image to
separate FITS files for each of the color layers, but I don't consider
that a big deal.

The biggest drawback of the median filter is that is it slow compared
to a gaussian blur, but that's what coffee and web browsers are made
for :-)

roland
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