Author Topic: Drizzle tool?  (Read 2598 times)

Offline Physicist13

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Drizzle tool?
« on: 2014 March 19 02:09:29 »
Sorry if thsi is an old question already answered! Is there a Drizzle tool in PI...seen some ealy posts about it but cant seem to see the final implementation...thenks,
Patrick

Offline Juan Conejero

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Re: Drizzle tool?
« Reply #1 on: 2014 March 19 02:42:51 »
Hi Patrick,

I am starting to work on it. Hopefully the new DrizzleIntegration tool will be ready for release before Summer. It will support the same set of pixel rejection algorithms currently available in the ImageIntegration tool.
Juan Conejero
PixInsight Development Team
http://pixinsight.com/

Offline Phil Leigh

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Re: Drizzle tool?
« Reply #2 on: 2014 March 19 09:10:04 »
What would be the benefit of such a tool?

Offline Andres.Pozo

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Re: Drizzle tool?
« Reply #3 on: 2014 March 19 09:35:21 »
This thread has a lot of information altough I don't know how much is still relevant.

Offline Physicist13

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Re: Drizzle tool?
« Reply #4 on: 2014 March 19 12:44:26 »
Juan, many thanks tht sounds great!!!!! Wasn't trying to pressurise you! ;) with pixel rejection that's really Drizzle++ :)) not aware of any other progs that would do that!!
Phil, it's a means of recovering spatial resolution if you are under sampling , ie pixel resolution is not as good as the optical resolution....as is the case with HST ;)) it does require that data was taken using dithering (ie random walk) as well.
Patrick

Offline Ignacio

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Re: Drizzle tool?
« Reply #5 on: 2014 March 19 18:32:06 »
Hi Patrick,

I am starting to work on it. Hopefully the new DrizzleIntegration tool will be ready for release before Summer. It will support the same set of pixel rejection algorithms currently available in the ImageIntegration tool.

Juan: will this tool be the first step towards a more general superresolution approach? I have been particularly interested for a while now, on better ways of handling bayered color information, such that all the info in a (dithered) stack can be used to better fill the information holes (versus debayering each single sub independently).

Ignacio

Offline Phil Leigh

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Re: Drizzle tool?
« Reply #6 on: 2014 March 20 05:42:47 »
Juan, many thanks tht sounds great!!!!! Wasn't trying to pressurise you! ;) with pixel rejection that's really Drizzle++ :)) not aware of any other progs that would do that!!
Phil, it's a means of recovering spatial resolution if you are under sampling , ie pixel resolution is not as good as the optical resolution....as is the case with HST ;)) it does require that data was taken using dithering (ie random walk) as well.
Patrick

Thanks... so if I'm imaging with 4.3 micron pixels at 400mm F5 (2.21AS/P)  or 1250mm F6.3 (0.71AS/P) would I potentially benefit from this Drizzle method?

Offline Physicist13

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Re: Drizzle tool?
« Reply #7 on: 2014 March 21 01:38:58 »
Phil, If I've got my sums about right (and using Rayleigh limit)..your Optical resolution for each of these setup is 2arcsec and 0.13arcsec respectively. If your pixal resolution is 2.2 and 0.71 then for the 80mm scope your about matched, so little gain. For the other scope you are oversampling by about x5 so would gain...BUT!! remember you will prob be atmospherics limited!
Patrick

Offline Phil Leigh

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Re: Drizzle tool?
« Reply #8 on: 2014 March 21 05:05:08 »
Phil, If I've got my sums about right (and using Rayleigh limit)..your Optical resolution for each of these setup is 2arcsec and 0.13arcsec respectively. If your pixal resolution is 2.2 and 0.71 then for the 80mm scope your about matched, so little gain. For the other scope you are oversampling by about x5 so would gain...BUT!! remember you will prob be atmospherics limited!
Patrick
Thanks Patrick... I'll keep an eye on this with interest!
regards
Phil