RGB Stars to Narrowband Image Transfer in Pixinsight
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- čas přidán 14. 09. 2022
- I finally got around to finishing my RGB stars to Narrowband image transfer pixelmath script. I have been workong on this for over a year now so now its time to get it out there. You can download it from the below link. Enjoy and please feel free to comment.
RGB Stars to Narrowband Image Transfer in Pixinsight Download:
drive.google.com/drive/folder...
Star Reduction in Pixinsight Download:
drive.google.com/drive/folder...
Star Reduction videos:
• The BEST Star Reductio...
• New and FREE PixInsigh...
Notes: If your "Blend" data is halo dominate which is mainly caused by method-4, you can change the blend modes to your liking
P.S. One more thing I want to address that I forgot to cover in my video. You dont have to only use a narrowband SHO image for the transfer, meaning, if you have a OSC image, you can color correct that image for star color, then create two copies, one for a basic starless of the main image, the second can be color corrected starless to show of your dual narrowband data. Then use my math to bring back the stars but more naturaly. Hope that makes sense :-)
*Update* The download link will be updated with revisions, therefore the math in the video will chanage accordingly, but the concept of how to run the pixelmath script remains
I have just, in the past 36 hours, discovered your star reduction and now RGB/NB combine PI tools. Marvellous! Working on my own NB Wizard right now. Thanks so much for these wonderful tools!
This is art! Truly, thank you very much for sharing this super process...what a tremendous gift you have given us. Thank you again and clear skies!
Absolutely outstanding job!! I was using your other scripts but didn't know about this one. Yesterday I applied it to merge the stars with the final processed NB image and it worked like a charm, natural colors free of any artifacts at all. Thanks for sharing this with all of us, you make our astrophotographer life much easier!
Great work - and a request: do not apologize for showing the math. I think it sets an expectation for the concept being 'hard'. It is spending the time to understand what the math is doing that lets the user master the skills to control the image. Your explanations and demonstrations of thinking about blending colors and what differences vs. screening are help me to understand so much more about imaging and image processing. If you really want to level up your processing skills, it is understanding this content. Look forward to more.
Also, I think this is inspiring me to write a PI script or tool to do cross section analysis - I have had to kludge that capability by jumping over to Astro Image J - for some filter analysis I did on my channel.
Hello Bill
I have just discovered all the work you have shared about PixInsight and Pixel Math and it is absolutely incredible !!
I came to astrophotography 2 years ago, I am a fan of PixInsight and PixelMath : my scientific background tends to make me see an astrophoto as a set of pixel with 0 to 1 value ^^
Especially with narrowband combination, all that I have seen, I applied it my own way with pixel math.
You have shown me what could be done with tons of works and skills.
Up to now, I was using RGB data to insert the chrominance for the stars, your RGB Stars to Narrowband opened (showed me) in addition, the possibilities of working specifically the luminance of the image for the stars only and then integrated it (this luminance may come from the RGB or Narrowband acquisition), all your pixel math work is just incredible !!!
In our community, we are very lucky to have passionated and talented people like you that share their knowledge and work, congratulation ;-)
Clear skies
Jean-Baptiste
Superb work as always Bill, looks like it works brilliantly!! - Phenomenal effort to get this done so quick too man! :-)
Clear skies!
Thanks buddy!
Fantastic work here Bill. Your star reduction Pixelmath tools have made a huge difference to how I was dealing with star brightness and size. While we often concentrate on our nebulae or galaxy details and almost deal with stars like they are some sort of distracting annoyance, personally I have always felt that how the stars look can make or break an image, no matter how good the main DSO object may appear. I have been planning on adding RGB stars to my narrowband images going forward so this has come at a perfect time. I've just switched my rig from planetary back to DSO so will definitely be giving this a try on my new target. Thanks again for this.
Wow, that's a really awesome compliment Logan, I really appreciate that, that's really cool of you to say those things and I really hope that these processes can help you moving forward!.
A labour of love indeed. Absolutely fantastic work and I look forward to trying it out on my images.
I just want to add that I did this to my Fighting Dragons of Ara (NGC 6188) images and considering it is a very rich star field, the results were very nice. When you can get great results in messy star areas, it is so pleasing. Thanks again.
Wonderful work. Thank you very much for sharing it. I’m looking forward to try.
Thanks!!!
I look forward to giving this stuff a try. Thanks for the hard work Bill!
Thanks Adam!
Absolutely fantastic!
You did a great job there. Finally my problem with the integration of the stars is solved.
Thank you!👍
Thanks!
“Now we’re going to discuss the math, and I’m hoping this will be the part you guys watch” You’ve not met me, but the math is why I’m here 🤘
Thank you so much Bill for your work
The timing of this is so perfect! Can't wait to try this on my current project
Please give it a try and let me know how it works. There is always a need to improve things and will keep the math updated :-)
Stunning work Bill. Thanks so much for your generosity and thanks for going in to the math. Give a man a fish he eats for a day give a man a net he eats for life.... or something like that :)
This is just awesome and it works, and by golly works great! Thanks so much for the genius work Bill.
Thanks Greg!!
Thank you, very little out there on in depth Pixel Math so this is a great learning tool.
This is absolutely brilliant! Finally I can use Pixinsight to add my stars rather than my previous and less effective Photoshop method.
Clear skies!
What is wrong with Photoshop ?
Your work is amazing. I have not tried this process yet. But seeing the previous results with your star reduction process, I am sure that this one is not far behind.
Thanks!!!
Unbelievably 'KISS' helpful my dear friend! You and Russ Croman with StarX and Noise X are really succeeding in simplifying and helping us 'artistic' folks who are not, and will never be, mathematicians. I have asked Russ Croman to see if there is a way to reduce 'corner-star distortion' for us folks with great equipment but still having a bit of an issue with corner-stars (even after careful collimation) especially us HyperStar owners. He said he's looking into it so that's also a really big deal for me. I can't hardly believe how much you are helping us! Keep up the great work
Thanks James!!! I actually have played around with the issues we face with corner stars. The only thing I could think of was to produce the "unscreen star" image using StarXterminator, then extract the RGB, use the R channel as luminance for the unscreen stars, as the red channel tends to be less distorted. This can help reduce some of the star distortion or CA issues some. Next, "screen" the stars back into the starless image to give you your corrected image. Give this a try on your end and let me know if it helps. I will look into it more on my end.
You're gifting some serious gems. Many, many thanks!
Thank you!!!
Really Awesome job man! My congratulation. Result BRILLIANT. Thank you
Thanks!!!
Wonderful work. Deeply appreciative for individuals like you. It make life much easier for people like myself.
Thanks Paul!
Fantastic. Just fantastic.
Thank you!
Looks like the method I will be following….❤️
Impressive work, thank you very much for the video. Very vlear explanation and nice mathematics.
Thanks Jose!!
Thank you Bill, Fantastic..
Thanks!!!
Thanks so much Bill for this incredible new tool using PM. Since we're just grabbing the stars from RGB to NB, is dithering needed when shooting the RGB stars? I shot 35 images per RGB filter at 20s each. I dithered every 5. There is still some walking noise since I dithered only 5 vs the 3 I usually use. But, I ran your routine and since it is only pulling the stars, it doesn't seem like the walking noise affects my final NB image. What do you think?
Thanks for the video and math. Question from a newbee, Are your images need to be Linear or Non-Linear?
Excellent processing. Why not charge 100 dollars for this script like Russell Croman ?
Love both this and your star reduction method. Very insightful! How does one combine the two activities (star reduction and transfer) without removing stars twice during processing?
Never mind...it's simple.
@@alexworonow788 yep, it is. Glad you figured it out 😎
absolutely awesome. your explanation with the star profiles in excel is so helpful. thank you very much. what is your way to integrate Ha into lrgb? there are also color shifts in the methods that I know. what is your approach for it? thx and br Thomas
I am working on a pixelmath method for adding Ha to R of an RGB image but may be a month before I finish. I have an idea that should work well so watch out for the vid :-)
Hi Bill.
Very great job.
If I understand, I only need to chose the mode (M in the third line of Pixel Math code)) between 1 and 6 (5 and 6 are blending modes) and drag and drop the Pixel Math triangle on the RGB image with stars ?
Thank's for your answer and clear skies.
JM
M is from 1-5, 5 being the blend.
Thank’s for your answer.
I thought E28 and E29 were 2 different blending modes and I could choose between both…
Anyway I am already using your stars reduction method and both your 2 processes are magic!
Again thank’s for what you are doing for all the astronomical community and clear skies from France.
JM
Increíble!
So my in my workflow, I remove the stars while linear( my first step is removing stars( linear fit bla bla)),
Will it still work when adding stars in the non- linear form?
The RGB image I basically do not touch, just stretch and use for stars….
Watched the video no less than 10 times!!!
If you're not really doing anything to your RGB data other than giving it a stretch then just leave it as that, I end up reversing the stars back to linear when I do the transfer so it's not a good idea to take linear data to do the transfer, just do a simple stretch on your RGB data and then my math will take care of the rest
Simple amazing work, so clever, NOW if you could do some wizardry math and remove clouds from uk skies 🙂
Lol!!
I am having a problem with this. When I run the process in pixelmath I get an error saying "Error: Invalid character in expression:", does anyone know what it could be?
Did you change something in the math? Is your image name the same as the name in the math script?
Thank you, thank you Bill! I thought I was going crazy trying to explain to my friends that I thought RGB stars and NB starless don't always mix well. Unscreened stars helped but the colors could still get wonky with bright nebulosity. I was doing a "brute force" expression to try to correct things - but it was pretty simple and unsupported with any mathematical rigor. Your Excel explanations are pretty enlightening.
Here was may expression (as embarrassing as it is) - drive.google.com/file/d/11nRSWfPKmbvAUjUP6yVDmoaPvBR8320W/view?usp=drive_link
It is now replaced with your methods and blends.
JIm-
I updated the math the other day, V14 now. Give it a shot and let me know :-)