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Re: kernel convolution? [message #49513 is a reply to message #49512]

Mon, 31 July 2006 07:51

edward.s.meinel@aero. is currently offline

edward.s.meinel@aero.
Messages: 52
Registered: February 2005

Member

No, a high-cut filter won't work. If you look at the FFT of a single
star (star-->point-spread function, FFT(star)--> modulation transfer
function), you will see that it contains information in ALL
frequencies.

Here's a couple of ways to remove stars:

1) determine the centroid of each star and subtract the appropriately
weighted point-spread function.
or
2) apply a median window filter with a width of about twice the width
of the star.

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[Message index]

		Re: kernel convolution? By: James Kuyper on Mon, 31 July 2006 08:45
		Re: kernel convolution? By: edward.s.meinel@aero. on Mon, 31 July 2006 07:51
		Re: kernel convolution? By: James Kuyper on Fri, 28 July 2006 14:09
		Re: kernel convolution? By: adisn123 on Fri, 28 July 2006 13:07
		Re: kernel convolution? By: Tom S. on Fri, 28 July 2006 12:54

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