Looking for software to Drizzle Canon Images

[[1ponders] (Paul)]

Does anyone know of software that can be used to drizzle large Canon images after they have been converted to tiffs or fits?

[sheeny (Al)]

Registax falls over with large tiff files does it, Paul?

Al.

[rogerg (Roger)]

I haven't used it for a while, but I thought there was an option for Drizzle in Deep Sky Stacker. I might be wrong, but it's only a free download if you don't have it already.

Neither CCDSoft nor RegiStar have Drizzle.

Roger.

[[1ponders] (Paul)]

I've been trying to see how to install IRAF from NOAO onto windows, apparently you can, but I feel like I'm hitting my head against the wall. I'm flat out trying to get past the .gz and .ps and .x86 extensions. It's taken me half a day just to work my way around them to open the help file. and that aint no help.

The other program that is available is called STSDAS. I haven't even started to look at that yet

[JohnH]

Paul, AstroArt will do it...BUT for drizzle to be effective you need to be undersampled...not sure you will get much from the technique with the 8", maybe the ED80.

[[1ponders] (Paul)]

I checked AA 3 John but couldn't see it. Might need to upgrade to 4 then. I'll be using either my ED80 and 0.8 FR or a Canon lens (50 or 135mm). It's for a Uni project.

[h0ughy (David)]

Originally Posted by [1ponders]

I've been trying to see how to install IRAF from NOAO onto windows, apparently you can, but I feel like I'm hitting my head against the wall. I'm flat out trying to get past the .gz and .ps and .x86 extensions. It's taken me half a day just to work my way around them to open the help file. and that aint no help.

The other program that is available is called STSDAS. I haven't even started to look at that yet

that seem like all linux file types Paul

[h0ughy (David)]

Originally Posted by [1ponders]

I checked AA 3 John but couldn't see it. Might need to upgrade to 4 then. I'll be using either my ED80 and 0.8 FR or a Canon lens (50 or 135mm). It's for a Uni project.

umm i have AA 4 and have no idea how to use it (ok i bought it thinking i would use it but IP seema t ohave everything i need)

[h0ughy (David)]

oh and i think but dont quote me but http://www.stark-labs.com/nebulosity/features.html says it can do drizzle, but doesnt say what camera?

[turbo_pascale (Rob)]

DeepSkyStacker does it.... have not tried it myself. The memory requirement is quite massive though (the nature of the beast), but of course, you have the advantage of native DSLR support, and you can use RAW files without the bother of converting to TIF or FITS before hand.

You also get options of 2x or 3x drizzle (4x and 9x the memory requirement respectively)

[Terry B]

Iris does drizzle after you have preprocessed your raw files. Must admit I don't usually use drizzle to combine images but stack using adaptive weighting in Iris

[Bassnut (Fred)]

Drizzle with a large Canon file?, why bother?. As John says, it sounds like you are oversampling already, drizzle is of no use to you.

[[1ponders] (Paul)]

drizzle is of no use to you.

Can you write my project supervisor and let him know. I'd love to be able to get out of it

Basically I've been asked to do a mosaic of widefield images and use drizzle to improve resolution. At this stage I'm still wading through what drizzle/dithering is and how it works. Then I've got to learn to use it.

[JohnH]

Originally Posted by [1ponders]

I checked AA 3 John but couldn't see it. Might need to upgrade to 4 then. I'll be using either my ED80 and 0.8 FR or a Canon lens (50 or 135mm). It's for a Uni project.

I never used AA3, in AA4 it is an option in the Preprocessing Dialog (see attached).

[[1ponders] (Paul)]

Thanks John, unfortunately AA3 doesn't have the resize option in the preprocessing options. Might have to have a chat to h0ughy.