Demystifying Drizzle in Astrophotography

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Drizzle is quite a complex topic - so I break it down for you in what drizzle is, why and when to do it and how to apply it in AstroPixelProcessor and PixInsight.
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Опубликовано:

15 апр 2024

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Комментарии : 30

@alfredterrence6112 3 месяца назад

Finally I understand what this drizzling thing is all about with a very clear explanation. Thanks for this extremely useful tutorial.

@garythompson3869 3 месяца назад

Excellent tutorial. I was never sure how much scaling (drop shrink ) to use. You have now given me a good starting point. Thank you, Sascha for clearly explaining the theory and process 👍

@TerryMcKnight1 3 месяца назад

A great tutorial on a process I didn't understand before. Thank you Sascha.

@raphaelboisard7228 3 месяца назад

Nice timing with siril now featuring true drizzle as well exactly today!

@timmoody7600 3 месяца назад

After watching this I'm noticing that my drizzled stacks are dimmer and harder to stretch than non-drizzled. For Christmas Tree Nebula with around 60 x 300s I abandoned the drizzled image in order to get enough saturation on the starless part of the image. Even with Jelly Fish at 111 x 300s I find the starless to be very weak for stretching in GHS. And these are with a drop size of 1, not 0.8.

@paulholdsworth2502 3 месяца назад

Excellent tutorial. I've always assumed it was a complex subject so I've never used drizzling. But even through you tube compression it's obvious how much sharper the images are and the value of drizzling. I always dither for noise reduction so I'll definitely enable drizzling when I do my stacking in astro pixel processor. Many thanks for sharing 👍

@tyshantz8675 2 месяца назад

Great explanation. New subscriber earned!

@AstroCorgi-1 3 месяца назад

Just found your channel. Thanks for making these tutorials! ❤

@nikaxstrophotography 3 месяца назад

Now I get the difference between the bayer trans drizzle and the normal drizzle, it is for the colour/greyscale so when I split the channels in APP I use just drizzle for HA and O3 and bayer drizzle for the Colour version, this explains why I get the crosshatch pattern when bayer drizzling.

@stephanep1330 3 месяца назад

Hi Sacha, Nice video! Should you also mention the requirement to dither with a sufficient imaging camera pixels (for instance at least 20 pixels on the imaging cam)? And also to dither with a non-integer pixel value on the imaging cam (we should target a pixel value for the imaging cam with some decimals)? NINA (in nightly version) has the ability to show you the number of imaging pixels you dither when you set your guiding cam dither pixels. Keep it up with your very interesting videos! Merci vielmal

@viewintospace 3 месяца назад

Very interesting and valuable comment!!!! And so we learn from each other!!!!!

@stephanep1330 3 месяца назад

@@viewintospace My pleasure! I've already learned so much from you...

@tvanpeer 3 месяца назад

And how often should you dither? I recall Quiv once mentioning you should dither every picture. Any ideas on that?

@viewintospace 3 месяца назад

@@tvanpeer I would support that statement from Cuiv. If the minimum requirement is 30-50 pics then it means so many pics with different positions - so except you make 1000s of shot exposure pics, you should dither every time!

@tvanpeer 3 месяца назад

@@viewintospace And for OSC with scale 1?

@user-or7cc2ht3j 3 месяца назад

I always BIN x2 to make my scope under sampled to collect light faster then drizzle but i use a momo ccd not cmos

@williamswayne8090 3 месяца назад

I typically dither at every 3 subs and a 5 pixel movement. Is that enough if I am gathering say 100 to 200 subs? Going to dithering every sub would add a bunch of time to my imaging session. How often should you dither to support drizzling? Love your tutorials. You do a great job.

@viewintospace 3 месяца назад

If you plan to shoot a 100 subs, I would dither every 2nd sub to reach the 50 dither movements... and so on....

@Safestassets 3 месяца назад

Should you click "apply to all groups" in WBPP?

@timmoody7600 3 месяца назад

As always with your videos it's nice to get hard numbers; I've been setting drop shrink to 1, so may need to go back and reprocess. My workflow has gravitated to WBPP with drizzle 2x, GraXpert, BXT, then resample back to the original resolution. Is that what you do?

@viewintospace 3 месяца назад

I never resample back, always happy to have some extra resolution 😉

@willemwitteveen8374 2 месяца назад

Great video Sascha. I have a Redcat 61 and ASI533 mc pro. The red lines in the graphic disappear with drizzle 2x, the red figures disappear at drizzle 3x. What is wise? 2x or 3x? Thanks

@viewintospace 2 месяца назад

Stay with 2x, Only if you would be still substancially oversampled 3x would be justified.