Drizzle

Image processing, astrometry, photometry, etc.
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Dunmunro
Posts: 86
Joined: 10 Jan 2019, 01:11

Drizzle

Post by Dunmunro » 18 Jan 2020, 23:41

I wonder if we might see some drizzle enhancements in the next Service Pack? I've noticed that drizzle doesn't seem to restore fainter star shapes as cleanly as I'd like. I'm using older cameras with bigger pixels and I need drizzle for maximum resolution.

fabdev
Posts: 221
Joined: 03 Dec 2018, 21:43

Re: Drizzle

Post by fabdev » 21 Jan 2020, 14:06

So, drizzle is working well on brighter stars but not on fainter ones?

Are the images really undersampled ? Just like in this example:
Nowadays it's really rare to obtain images where drizzle is effective. Stars must be 1-2 pixel wide, like in the example above.
The sequence should be taken unguided, or guided with a dithering which give fractional shifts in the main camera.

It would be useful to see a sample image.

Dunmunro
Posts: 86
Joined: 10 Jan 2019, 01:11

Re: Drizzle

Post by Dunmunro » 24 Jan 2020, 00:37

Sorry, I got tied up with other work. Will reply ASAP.

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