PixInsight Gradient Correction Tool - Tips, Tricks, and Examples.
ฝัง
- เผยแพร่เมื่อ 23 ก.ค. 2024
- PixInsight just released their new Gradient Correction tool. Here is everything you need to know about it. I provide tips, tricks, and lots of sample images. I also compare it to the current DBE (Dynamic Background Extraction) tool to see if it can replace DBE completely.
Recommended Equipment and Affiliate links:
Agena Astro: agenaastro.com/?rfsn=7861342....
High Point Scientific: www.highpointscientific.com/?...
Smart Telescopes:
Seestar S50 All-In-One Smart Telescope (my current recommendation): bit.ly/4d4XZw7
Cameras:
ASI2600mc DUO Color Camera: bit.ly/4csEPjE
ASI2600MM PRO Monochrome Camera: bit.ly/3WcVvG3
ZWO ASI6200MC Pro Color Full Frame Camera: bit.ly/3QdM9G6
Mounts and Tripods:
ZWO AM5: bit.ly/3vZ3Dzp
ZWO TC40 Carbon Fiber Tripod: bit.ly/3Qc9b0g
iOptron CEM70: bit.ly/3Q7KdyT
iOptron Tri-Pier: bit.ly/3WbgfhC
Sky-Watcher EQ6R Pro: bit.ly/3PwUdli
Telescopes and optics:
Celestron 11" EdgeHD: bit.ly/4apIE7b
Starizona Hyperstar 11: bit.ly/494gopO
Celestron RASA 8" Astrograph: bit.ly/3UtlVlQ
Askar FRA400 72mm f/5.6 Quintuplet refractor: bit.ly/44bI1MD
Sharpstar 150mm f/2.8 HNT Hyperbolic Newtonian Astrograph: bit.ly/3Urd4AP
Filters:
IDAS NBZ 2 Duo Band Filter (Recommended for RASA or Hyperstar but also works on slower telescopes): bit.ly/3TyWq0B
Optolong L-Ultimate DuoBand filter: (Recommended for telescopes other than RASA or Hyperstar) bit.ly/3vSa737
Visual Observing and Accessories:
Sky-Watcher 150mm GTi GoTo Telescope (best value portable telescope): bit.ly/3Us9g2o
Sky-Watcher 16" Flextube SynScan (serious aperture with Go-To): bit.ly/3JrtGT1
Premium HoTech 1.25" SCA Laser Collimator (for reflector telescopes): bit.ly/3JvGpDW
Basic Laser Collimator (for reflector telescopes): amzn.to/3OwaohV
Affiliate programs disclosure: I am a member of the Agena, HighPoint Scientific, and Amazon affiliate programs. If you use the links in my video description, I will make a small commission at absolutely no cost to you. This helps me support this channel and continue to make these videos and tutorials for you. Thank you for your support.
If you like my work, consider supporting me on Patreon so I can continue to bringing you videos like this: / abdurastro
Clear skies my friends. - วิทยาศาสตร์และเทคโนโลยี
like #20
DBE is one of those tools that can perform miracles if the user knows how to use it but most people have misconceptions about how to use it and throw their hands in the air and say it is not that good.. Yes, as a default setting, GC works ok but it could be a lot better with a real time preview. With complex gradients not on the edges, it starts to introduce strange rings and the PI team are actively working on fixing that. I am sure that sooner rather than later, GC will evolve into a great tool.
I have been testing GC more and you are correct. With complex gradients I sometime end up getting strange rings. GraXpert has performed better overall as I found in my latest video. DBE is great but can take a significant amount of time to correct really complex gradients.
Thank you, very clear and useful, I now have to re-process old images using that tool and the AI helpers !
Thank you. Me too! Can't wait to see what results we can get with all these new tools compared to a few years ago :)
I think its great! But I wish they could add an option for the user to enable a checkbox that let us see the extracted gradient.
Hopefully that's something that will be added later. We might be able to use Pixel Math in the meantime to generate the gradient.
Thanks will try it
Let me know if you like it :)
This is supposed to be better than GraXpert, which is better than DBE by miles. My experience showed that difference between Gradient Corrector and GraExpert is target dependent and picture quality dependent.
Importantly, if flats are not good and speckles/rings appeared on integrated picture, then neither will correct.
I think will a sufficiently small scale and smoothness value and a lower tolerance setting, it can do a good job of correcting the rings. I will be experimenting some more on that with some really old data I have. However I always recommend trying to get the best quality data and getting good quality calibration frames to minimize the amount of processing required later.
Thanks for a good video. I’d like to know how were your images processed prior to using the the new tool? (I mean after stacking).
Thank you. This video shows some of my processing workflow:
th-cam.com/video/Eom27tUsCbw/w-d-xo.htmlsi=QWRFACRWxDe3OyJz
Of course this is for simple cases. For monochrome images or images that require more advanced processing, my workflow was more complex. I will make some more videos demonstrating the different processing techniques soon :)
I would like to see a comparison between GraXpert and gradient correction.
I just finished doing one :)
th-cam.com/video/oeLAyyjoS0Y/w-d-xo.html
like # 19
Hey Abdur, great tests in this video. I ran a test on the subs collected on M101 with my new refractor and I was impressed. Though it was not difficult to achieve, because my subs were shot at a dark site before the moonrise on Thursday and Friday this last week. My ultimate test would be to re-edit my M45 project, which lasted from October to February. There I would see the real potential. Just out of curiosity, were you using GraXpert? I was always testing both DBE and GraX and picking the best result of the two. But this was time consuming though, so I’m hoping Grandient Correction + the upcoming MARS project will provide better results in less time wasted testing different parameters.
Hi Patrick. I look forward to hearing about how it performs with your M45 project. I don't use GraX as DBE was able to do almost everything I needed (with a lot of manual work in some cases) but I will process some images with both GraX and Gradient Correction and see how they compare. From everything I have seen so far Gradient Correction does a better job than GraX so I am not expecting any surprises.
Thanks for the tutorial Abdur. I just updated Pixinsight, but it doesn't show GradientCorrection. Any idea what went wrong?
My bad, had to download an entire new version. Not just update
Glad to hear it worked out :)