Dual Narrowband Filters, Siril & the Hubble Palette
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- Опубліковано 1 жов 2024
- In this astrophotography tutorial I go through creating the Hubble Palette using images shot with a color camera thorugh a dual narrowband filter, and using Siril for the processing.
The Hubble Palette is a popular technique that allows us to represent different emission lines in space using specific color channels. By combining the data obtained through dual narrowband filters, we can unveil the hidden beauty of cosmic objects with enhanced detail and vibrant colors. Usually reserved for monchrome imaging, I'll show you how to fake it using a one shot color camera and a dual narrowband filter, processed with Siril.
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it did not, I figured it out. I was not removing them in linear mode. Sorry to waste your time.
No worries. Glad you got it sorted.@@tbodrero
I just want you to know how much I appreciate these videos! For cost savings reasons I have not purchased PIXinsight so your videos showing me the power of SIRIL have been monumental to me! Just wanted you to know there is someone out there who is deeply appreciative! Cheers!
Great to hear! Thanks so much!
Your siril knowledge is the best I have seen thanks for these videos
Thanks so much!
Agreed. I now feel like I don't need pixinsight
Great tutorial! Is it possible to do this for multiple nights of data with separate calibration files? I've been trying to modify the OSC_HaOII extraction script to do that with the pp_light outputs, but haven't had any success. It keeps giving me the error "Error in line 28 ('seqextract_HaOIII'): command is only for OSC CFA images."
Someone had mentioned that there's an option for this in Sirilic, but I haven't messed with it.
Hi Rich, This video really helps. I am using the Askar Colour magic filter, one filter for HA & O3, while another one is O3 & Sii. Does it need another script for O3 & Sii. In this case, how to seperate the HA, O3 and Sii, then recompose the image in Siril. Would really appreciate if you can make a video on this, that would really helps. Thank you.
The Ha and SII lines are very close in the spectrum. Ha is 656.3nm and SII is 672 nm. There's no way of distinguishing which contributes to the red pixel. However, could try running the Extarct_HaOIII against your SII/OIII data, and use the Ha stack as your SII, and blend with the Ha & OIII stacks.
Excellent tutorial. By the way, you can add S2 data (with OSC + S2 filter) and then use pixel math for the RGB composition.
Great tip! Thanks!
This was amazing. I've never done this before but you made it quite easy to follow along. Your Siril tutorials have completely changed how I apporoach my work. Thanks!
Great to hear! Thanks!
Rich, this is an excellent tutorial. Thank you for all the time you invest in these videos.
Glad it was helpful! Thanks!
Yes, simply to follow by practice 👍
A tip for ASIAIR users: The ASIAIR stacks the calibration files for you. The Siril scripts won't work with these files as it is looking for more than 1 file in the flats, biases and darks directory. A very simple fix is to just duplicate the files in each of those three directories. Just Ctl C, Ctl V in the directory; the names don't matter. There are now two files in each directory and the scripts work. Maybe this is already known, but I didn't see it anywhere.
Doesn't the asiair only do that if you live stack?
excellent, but can you do this without the flats and biases files?
Not with this script, but I have a modified one that only requires lights & darks. 1drv.ms/u/s!Aii2lourR1D0gaJ46ypr8pS2pYcLyQ?e=D5W3xS
I think I jumped into this one a bit too soon (hadn't watched the GHS Transformation stretch video you eluded to in a beginner video I had watched earlier) but I took lots of notes and am getting the feel for it.
Thank you for this tutorial! I learned tons of new stuff!
One tip I have to bring out the colors of nebulae (and even galaxies) is to change the type of stretch to inverse modified asinh transform or inverse GHT (regular ones desaturate the image), the color stretch model to saturation stretch, and then select a symetry point of the part you want to add color, click on the eye dropper, and then stretch! You can use Generalized H.S. to do a more general saturation, and Modified A.T. to do a more color-specific saturation. It works like magic!
And keep in mind that this doesn't stretch the image, it only saturates it. I hope this helps!
I'll have to try that! Thanks for the tip!
Ottima guida una delle piu complete a riguardo che ho trovato sul WEB, COMPLIMENTI
Thank you!
Fantastic video. I have a question. Can the same method be used to combine RGB subs with subs obtained by using the Optolong l-Ultimate filter? Greetings from Poland.
Yes, absolutely! Thanks!
Rich
I am 72 years old and started learning about astrophotography in January of this year with a Seestar and later purchased a ZWO AM5, 60 mm refractor, cooled color camera etc. You have been a big help to me by teaching me Siril. I do astrophotography from my Bortle 8 backyard with a Ha OIII filter. I have followed your Dual Narrowband Filter & the Hubble Palette video and produced some images. I am planning to buy a SII OIII filter and wondering how to get a SII mono image from my color camera and combine with Ha and OII for a SHO image. Maybe an idea for a video.
Thanks for your help,
Don
Glad to hear the videos have been helpful. I haven't messed with SII filters, so can't give an exact answer. This script came from the devs at Siril, so I'm not sure how or if it would be possible to extract SII.
Wonderful video. There is no better astro photo than this one with the real colors of the stars. Since your camera is color, it is so easy to spend an hour with short exposures at the highest dynamic range without a filter or with only an LP filter to add the real colors of the stars to the background of the beautiful Rosette Nebula. Thanks!
Thanks so much!
Just came across this instructional video and it is amazing! Once again you are very thorough a easy to follow. Thanks for putting in all of the time and effort to help us learn more and more about this great hobby.
Thanks so much! Happy to hear it was useful!
absolute legend, your content is so good, thanks! quick question: do you know how to use this script to process multi sessions across different nights using sirilic? I have tried and failed and I can't find a way to save my life!
Hey thanks! You wouldn't use the script with Sirilic. I'm pretty sure they have options to do the extracting which then effectively writes the script
Great Video Rich, very easy to follow, now to see if I can put it into practice. Thanks. 👍
Glad it was helpful! Thanks!
Do you get color mottling in your background with topaz denoise? I've noticed the background is never quite right when I use it. I can correct for it but it's kind of a pain. lol
Sometimes yeah. It depends on the data. Lately I've been using GraXpert. ua-cam.com/video/OmHBvWwU6zE/v-deo.html
You watch this then you wonder why you ever bought Pixinsight, cheers for another great tutorial, my pics have come on leaps and bounds since following you, respect 🤘
Wow! Thanks for the great comment!
I tired this with the formla thats pointed out, got a very pinkish/purple color on the entire image. Like a filter on instagram, not sure if this is common or no. playing with the percentages did not help. any ideas what to do? I am also doing the rosette
Really hard to say. Maybe run through it again, or check each of your light frames to make sure the days looks good.
Awesome tutorial, as a beginner I learned a lot and enjoyed your video, thank you very much.
Glad it was helpful! Thanks!
If I have SII exposures can I add them to the green channel when doing pixel math? or is there a different way to incorperate them?
I haven't had the opportunity to work with SII, but it makes sense that you could do that.
Hello. If I don’t have flats, how do I do it? The script is not working.
You need all of the calibration frames shown in the video for the script to run.
Rich. many thanks for this one and all the others you make. they are so detailed and informative and really helpful. i have a question regarding filters like the Askar Color Magic Super Duo-Narrowband D1 (H-a/O-III) and D2 (S-II/O-III) set. can you maybe explain how to use this set to it's fulleset with siril. is it possible? i mainly refer to the SII data- how to extract and use it. many thanks for all the hard work
I'm not sure if the SII could be extracted. That might be a better question to ask in the Siril forums. I'm thinking with an OSC the SII would be too close to the Ha in the spectrum. Maybe use the Extract Ha only script for the D2 and use that as the SII, then blend it in to your liking? I'm just spit balling though. Not really sure, sorry.
@@DeepSpaceAstro Hi Rich. I have some M16 data from the D1 and D2 filter with beautiful blue poping out on the auto strech of D2, but i cannot bring them together in siril to maintain that. tried various options using pixelmath without much sucess. If you want to have a go, i am happy to send the files over. Regards, Eddie
Hey, it just says failed to run script along with telling me that I don’t have any calibration folders, I can’t even get past the first 2 mins of the video😭
Nice one Rich, regarding the star colours when using my dual filter I tend to do a stretch until the colours start to show, then run remove green noise, invert & run it again. I then go back to the original star image do some stretching & tend to get some nice blue & orange stars pop as well as white. I do tend to do this in photoshop as that's where I recombine the stars but I cannot see any reason why it shouldn't work in SIRIL. It's a tip I gained from James from the DSO imager channel, he tends to use Pixinsight for most of his processing but it can work in other programs to.
Thanks for the tip!
Hi and thanks for your tutorials and reviews. It would be great that the same script would be born, only for the extraction of Sulfur and Oxygen. Since now there are more and more narrow-band filters in this spectrum for color cameras.
Since this is a script from the devs at Siril, you may want to ask them about that. Thanks!
You covered a lot of my doubts about this workflow, the only part that was a bit rushed was the stackign part but I will search for the stacking tutorial, overall I learned a lot in this one as I am very confortable with GHST but seeing how you use the tools that is slightly different from how I do connected lots of dots here, same for how you do color calibration... I usually use the white poing around a bright star not the nebula itself, now I wanna take a look on the difference it make when I am stretching, makes more sense your way. Thanks for the masterclass
The stacking is done with the script, unless I misunderstood you? I have a video, that in part, goes over the folder structure required for these scripts if that's what you're looking for. ua-cam.com/video/9K-V2VIcwfQ/v-deo.html Thanks!
Another great tutorial Rich. Looking forward to trying out this approach. Many thanks.
Have fun! Thanks!
Simple now to translate some unwanted colors with OSC (pollution , etc), while opening the door for other advanced processing
Cheers from a very cloudy north of England. Have you ever looked at AstroDenoisePyGUI as a free piece of standalone denoise software? Just downloaded today I'm astonished how good it is. Some limited discussions on Cloudynights. I don't have PI or PS so seems like a decent and free Blur Xterminator alternative, given that Sirils capabilities aren't that great yet. No instructions as far as I can tell, so just ran with the defaults.
I haven't, but I'll check it out. Thanks!
Rich, first let me say, I have really benefited from your videos and I echo many of the responses you have received. Very informative. I do have one question about the dual narrowband processing. I use an ZWO ASI183mc pro and using the method you have described here, I am unable to calibrate out amp glow . Any suggestions?
Thanks so much! I can only guess but are you sure your darks are at the same settings as your lights? Gain, offset, exposure time? Are you reusing darks from another session? If so, maybe they're too old and it's time for a new set?
@@DeepSpaceAstroHi Rich, I am using a complete set of calibration frames, darks, dark flats, flats and lights, all taken at the same time. The darks match the lights, exposure time, gain, cooling, offset….. I’ll try running it again.. thanks
@jimking2393 Sorry I couldn't be much help. Let me know what you find.
Hi, I dont have biases and flats frames, is there a way to complete the processing? I use OSC_Prepocessinng_without flat script.
Here's modified version of the same script that doesn't require flats or biases: 1drv.ms/u/s!Aii2lourR1D0gaJ46ypr8pS2pYcLyQ?e=0PwuVt
@@DeepSpaceAstroThank you very much, I really appreceate it.
Oh thought you were asking about what this video is covering. ua-cam.com/video/Y-WmMvepTHA/v-deo.html
In color Calibration, the first step works find but when I try boxing the nebula, I get the error "Make a selection of the white reference area". Any idea what I'm doing wrong?
Sounds like you may have not clicked the "Use current selection" after drawing your selection. It's the one closer to the bottom-right corner, not the one up top.
@@DeepSpaceAstro Yup, that was it. Thank you! I've started a lot of new hobbies over the years but never struggled as much as I do with Astrophotography.
Believe me when I say, I struggled hard in the beginning too! Heck, I still struggle at times when the occasional gremlin rears its head.
Hi Rich . It seems there is an "opportunity" here for SiriL to possibly offer a way to save a Manual Background Extraction such that the Background Selections for the Ha Channel could be identically applied to the OIII Channel . This should be better shouldn't it ? What do you think ?/SRK
Yes I that would be nice. Who knows, maybe some day that'll happen. Thanks!
Congratulations for the channel! This tutorial will definitely give a new life to my L-enhance, i have a project of the heart nebula only with light files and this script requires calibration files apparently, is their any workaround for that?
You could either modify the script to not require calibration frames (can be challenging for some), or use Sirilic to build and run the script. I have a video on using Sirilic for multiple nights, but not for the Hubble look. But it allows you to stack and preprocess with or without calibration files. ua-cam.com/video/HJHz1dEy62c/v-deo.html
Thank you for the quick reply, also having trouble with cirilic, already stacked multiple nights using DBF script with mixed results, what should be the advantage of cirilic for multiple nights?
@@DeepSpaceAstro
Sirilic is nice when you have multiple nights, each with their own set of calibration frames.
Cool. On the final there was a faint blue strip down the left side of the pic. What caused that and how would you get rid of it?
Not sure, you can see it faintly when I start to stretch as well. Could've been a little stray light from the neighbors auto-flood light that sometimes kicks on. I'd just crop it out.
And if it can't be croped away i use the Free Select Tool in Gimp and draw around that area to select it. Then i de-stretch and desaturate it slightly. Just a little so it's better, but not enough so it's visable that you've tampered with that area.
-> also if you can't select the area you want to transform, then select your dso instead and press Select-Invert. That way you select everything except your dso.
GREAT tutorial.... Thanks for slowing things down a bit; it's much easier to keep up. Cheers, Michael
Glad you liked it! Thanks!
First: Thank you for this, and your other tutorials. That have made a big difference in my results.
Second, if I wanted to include Astrosharp in this workflow, should it be before or after star removal?
You're welcome! You could do it either way. Whichever looks best to you.
Thank you for this tutorial, I'm really new to astro photography & your tutorials have really helped me along as i process/stretch with your video playing along side me guiding me with clear step by step help. Will be buying you a coffee, thank you.
Thank you! Really happy to hear that they've been helpful!
I just have finished my first picture using this technique! I'm very very happy! Thank you sooooooo muuuchhh!!!!!
That's great to hear! Thanks !
Excellent video
For this image processing do I have to use any filter when I capture images .?
Yes, a dual narrowband filter like the Optolong L-Enhance or L-Extreme
Thanks so much, I have been watching your videos and learning. Absolutely the best Siril instrumental videos on UA-cam.
Thank so much! I appreciate that!
Thank you @Rich for your tutorial workflow in Siril. Easy to follow for a newbie like me in astrophotography. Nicely done. #clearskies
Thanks! Glad it was helpful!
I just discover siril and while investigating deeper I found your channel, thanks for sharing your awesome work!!
Thanks so much!
I love this workflow. It's worked great for me using a 7nm DNB filter... still having issues recovering the blue colors that get lost in the mix though so I have to figure that out.
Great to hear! Thanks!
Pretty sweet man. You’ve put in some work for sure. Sir tik and PS are a match made in heaven.
Sir Tik? lol Are we all royalty now?! Thanks man! Appreciate it!
WELL DONE Rich! Really conveys the light touch needed to keep these images looking real.
Thanks man! Appreciate that!
Brilliant thank you , I've had Siril two years and not tried it until now . I'm so excited to finally be able to post process properly AND emulate the Hubble palate thanks to you .
Thanks! Glad it was helpful!
Again great video. Actually what i needed, since i started to use Duo Narrowband filters an i wondered how to go about i Siril. Thanks again.
Happy to help! Thanks!
GREAT GREAT GREAT! Love this video! Thanks a bunch!!
Glad you enjoyed it!
Very informative as always. Did you only use narrowband data or did you have data without the filter and combined the two?
Thanks! Just the narrowband data.
Rich, you are simply THE BEST ! Thank you so much for your lessons !
Haha! Thanks! Glad you like them!
Thank you. Going to get some data on whatever is high in the sky tonight since its the last clear night for a bit. Then I'll run through this workflow and give it a go.
You're welcome. Good luck! Thanks!
Hey Rich, I noticed your Ha and Oiii results were the same size/sample rate. I’ve been doing a linear match and then saving the 32bit Oiii as a 16bit so I can work with them. Do you have any suggestions here? I’m not sure if I’m losing anything in the downsample.
Hey Doug. Do you mean you save them as a 16 bit tif for PS or similar? When I do that I open the tif in Siril when I'm done and then save as a 32 but fit. Hope I'm understanding your question?
@@DeepSpaceAstro When I do an OSC_Extract_HaOIII my Ha result is 16bit (18.1MB) and my OIII is 32bit (36.2MB). Reading the docs I understand this is due to the OSC Bayer Matrix. What I don’t find, or understand in the docs is how best to get the two images to same dimensions. I brought this up on Siril GitLab and they pointed me to the docs 😂
Edit - I am usually just upsampling my HA by saving it off at 32bit. I’m just not sure if there is a better way. I’ve done the tiff thing out to PS too and I don’t notice any visible difference.
Hmmm. I guess I never noticed. Interestingly, the docs read that you could drizzle Ha to match Oiii. In the script I do see the drizzle parameter being used. I'd have to run through everything and take a look to see what's happening.
@@DeepSpaceAstro Are you using OSC with drizzle script? I read that too but was concerned that drizzling early might mess with PCC later. Maybe that’s not a concern…
I used the OSC_Extract_HaOii script shown in this video. Looking at the code it appears it drizzles the Ha.
Excellent siril tutorial as usual from you Rich. Thanks again...
Glad you enjoyed it Thanks!
Brilliant as usual. All I have is the L Pro filter unfortunately. Can I get a similar result with that filter?
You can try but you're probably better off using my script for RGB images. Look in my scripts playlist
Hey Rich awesome video. It helped a lot. Thank you! At this moment I'm struggling with multi-session imaging and HOO processing. I have several sessions with flats, darks, biases, and dark flats, and I want to split them into HA and OIII channels and then combine them using Pixel Math with siril. Could you make a video about your process? I think it would be really helpful for many people. There's no decent video out there that covers multi-sessions with Narrowband OSC processing.
I actually haven't done that myself, I'll have to give that one some thought.
@@DeepSpaceAstro No need to stress. I'm also still tinkering with it. There's an option in Sirilic for the Ha/OIII extraction. However, my OIII file inflates to three times its size. According to some forums, one needs to resize the files to the same size using Drizzle. In the built-in script, it seems to be all included. However, the built-in script Ha/OIII only works for a single session.
Top shelf presentation, thanks for sharing, subscribed
Awesome, thank you!
Excellent work and tutorial. Thank you Rich.
Thanks so much, and you're welcome!
I have an issue when I re join the stars and the object, when my image already has a ton of stars so stretching the stars just adds more. In your video you images starts with none. Any idea what I'm doing wrong?
When you are doing the star recomposition, are you sure you're loading the starless file on the left and the star mask on the right?
@@DeepSpaceAstro I am, I followed the video to a T. I am trying it on another target (Jellyfish Nebula) but that shouldn't matter, right?
It shouldn't . Maybe I'm not understanding what you're seeing. So when you load in the starless to the recomp tool, you see a starless image, correct? Then you load your star mask, and start stretching the stars in? You didn't maybe stretch the stars or the whole image before removing the stars by chance?
@@DeepSpaceAstro I removed there stars in Linear but clicked the pre stretch in the dialogue.
hmmm. That's the right way. What about my question about loading the starless. It does come in starless?
Magic. Fantastic. Got my blues :-)
Awesome! Thanks!
this tutorial is golden, thank you so much for sharing!
Glad to hear it was helpful! Thanks!
Thanks for this one! I've been wanting to do this, this will be a huge help!
You're welcome!
Excellent videos. I am new and probably trying to run before I can walk. I have dwarf2 with ZWO dual band filter. I have tried this procedure but get error saying there are not enoough stars in the reference image. The data stack ok with the stadard OSC_Preprocessing script. Any ideas?
You get that error when running the script? Maybe try this command and then run the script? ua-cam.com/video/BOVLBVvHTdo/v-deo.html
@@DeepSpaceAstro Thanks for the reply, I will have a look over weekend. The script creates all of the new files in the process folder and when I open them in Siril, I can see stars. I get the same with the Extract_Ha script.
I had this problem when shooting with my 50mm and a stock dslr and only getting 20 subs och 90s each. Then when trying with my 135mm and modified dslr with 250 subs of 90s each it worked. So my guess is that the Ha part needs more integration time to be able to match enough stars with the Oiii part.
(It ofcourse could have other causes, but i find them unlikely).
Write again if it doesn't work! Good luck!
As always Rich your videos are so well done. With this one however I have a problem. Instead of getting a "Results" folder with the Ha and Oiii files I get a "Process" folder that contains only bias frames with Gimp and .symlink extensions. Any thoughts?
That's odd. Are you looking in the correct working directory, that you have set in Siril?
@@DeepSpaceAstro yes. Not sure if it is relevant but my session went past midnight so there are Bias, Lights and Flats with different dates and my darks are from my darks library. I have tried it several times but with the same result. As this was my first effort with a dual band filter it is disappointing but I am off to an astro camp on the weekend so I will give it another go.
@@RayCampbell-g7r Na that doesn't matter. The working directory is the only thing that I can think of. If you look top center of the screen in Siril, that's your working directory and where that folder should be.
@@DeepSpaceAstro Yeah that's ok. If I come up with a solution I will let you know.
Would having jpegs and fits in the folders (as saved by Asiair) be the problem do you think?
Do you need Bias, Flats, Darks and Lights to run this script or can it be done with only Darks and Lights?
You need them. You could however modify the script to not require them.
Unfortunately I have no idea how to modify scripts. I just use what is already available. LOL@@DeepSpaceAstro
I made a copy and edited it for you. You just need Lights and Darks. 1drv.ms/u/s!Aii2lourR1D0gaJ46ypr8pS2pYcLyQ?e=RvOCgF
@@DeepSpaceAstroThanks. I will give it try later tonight
Will this process work with the ZWO Duo-Band Filter too?
Very great video tutorial as always👍👍👍. How about i have different nights of imaging how do i use the script?
Sirilic may have an option for this but I haven't looked into it yet. I have a video for Sirilic but it's just for standard stacking over multiple nights
@@DeepSpaceAstro yes i already watch that one and yes its just a standard stacking. hope you made one too for extracting Ha OIII for several nights of imaging.😅 thank you very much.
Sorry I should have been specific. In Sirilic there's an option for Duo Ha/Oiii. I'm not sure what it does, I haven't played with it, but maybe it's what you're looking for? Look at the Creationg a Project section here: siril.org/docs/sirilic/#user-manual
@@DeepSpaceAstroi tried, but there is a seperate session for dslr and duo band
@@DeepSpaceAstro i try unchecking the DSLR and just the Duo Ha/OIII remain check and it works. It extract the Ha and OIII captured two nights. Feeling happy for this free software. thank you dude.😁😁😁👍
Did you ever try the imaging recompositon tool for this Hubble pallette? Great video; I need oxygen now. HAAAAAAAAAAAAAA
Yeah but I got better results using this script
@@DeepSpaceAstro Good to know. Where is this script???
I'm referring to the script in the video.
So Hubblematic is obsolete? I'm a bit confused, sorry. This video is an update to the "Luko like" technique. Correct? Thanks @@DeepSpaceAstro
No the Hubblematic is still an option. This does not replace the "Luke like" technique. I believe it is however a better option to get that look
amazing tutorial. Let me dig into my old data and try this out. Thank you so much for this.
Awesome! Rich. this came out so great! just tried with my old rosette nebula data. Thank you for the video.
Awesome! Thanks for reporting back!
Game changer....thx
Thanks! Glad you like it!
I love your videos. Siril is a great free tool and it is not covered well on YT unlike PixInsight. Keep this going on
Thanks so much! No plans on stopping! 😉
Free is irrelevant. Its important to donate to projects like siril and others to reward their efforts and motivate future development. Without them your options would be more limited and quite expensive in comparison.
@@bonzer2u I totally agree with you
Great video ty
Thank you!
uncle rich
Haha. Hi Gabby! 👋
Thanks
Thanks for your support! It's much appreciated!
Hi Rich! Great stuff, really close to my workflow. I’ll have to try background extraction on each file before composing. I’ll also have to try the pixel math.
Question: My last project I thought it’d be cool to incorporate one session of unfiltered OSC into the sirilic stack just for the stars. I ended up with a starnet decomposition error related to images must have same channels and dimensions, I’m not sure what the actual problem between the result files was. I ended up merging the stars back in photoshop, which worked great. Would’ve been nice to figure it out in Siril/Starnet though. I’ll keep working on it. Any ideas on this?
Hmmm. Could it be the image dimensions were different? Maybe you cropped them before trying to combine them? Thanks!
@@DeepSpaceAstro I was looking back, I save off my files with various processing step names after I do big changes. It looks like it was due to a 16->32->16 bit conversion I ended up with different sizes. Thanks man! On a good note, I think mixing OSC and narrow band sessions would work. Goal was to get full color stars on narrowband nebula. Sirilic handled that great, btw.
@@AstroAF Awesome! Glad you got it sorted
@@DeepSpaceAstrohey, I just reproduced that different size issue. The resulting image for Oiii is scaled up from my multi-night sirilic process. I have no idea why yet.
@@DeepSpaceAstroI just want to say this video is golden! Wow man, I just walked through this on my latest and my mind was blown at the results. Pixel math is so powerful! Thank you!
The thing that annoys me about Siril scripts is their insistence on demanding the use of bias frames. I've never even taken bias frames and I understand that they are not required for cooled cameras and can even mess things up, yet if I want to stack in Siril I need them!
I believe they are needed to calibrate the flats. Regardless, there are some scripts written by Siril and myself that don't require some, if not all, of the calibration frames. You can also write your own if that's something you're interested in.
@@DeepSpaceAstro thanks for replying. I found that script in the comments thanks. I also used your video to solve the starnet problem that was crashing siril. I had the GUI version installed! Followed all to completion thanks. It's the most professional result I've ever had in more than 3 years doing this (and after just buying pixinsight which uses almost exactly the same tools that I doubt would bring anything additional to the table for this process anyway).
As for me writing or modifying scripts. Um no, I don't have that kind of brain I'm afraid. Very much a driver not a mechanic! By the way I've just bought an sii oiii filter for colour cameras. Is there a bias and flat free script for that extraction anywhere that you know of? Thanks!
Glad the videos have been helpful! Thanks. What end result are you looking for with a script that doesn't require biases or flats? Just an RGB result?
@@DeepSpaceAstro I suppose it would be 3 channels (or the way it's done in Astro pixel procesor, but for me with questionable results and less control than with your siril method) is actually 6 channels! The process I've seen ends up with R G B channels, an Oiii channel from the HaOiii filter and another Oiii from the SiiOiii filter. Then there's the HA channel and the siii channel! Is that 6?🫣 Edit, no it's 7. That would be a monster script right?
Yeah that's a bit much, and I'm not sure how to extract the SIII.
This is awesome thank you.
You're very welcome! Thank you!
So much good information!
Glad it was helpful! Thanks!
EXCELLENT TUTORIAL!!! WOW!
Thanks! 👍
Excellent post 😉👍 thx for sharing
Thank you too!
Exactly what I searched and found: put in a memo; thx for your efficient presentation 👍
@@DeepSpaceAstro Rick, i have a question : which color (Ha or OIII) for the luminance ? Do I should use the RGB composition ?
So this workflow doesn't use the RGB composition tool, but if you wanted to do that, I'd put Ha in for the luminance and see what you get.
@@DeepSpaceAstro your workflow changes from the “standard flows”, a litle more longer, but the (yours and mine) results are impressive . Thx 😊
Great tutorial!
Thank you!
Thanks!
You're welcome and thank you for your support!
so will this script run if i dont have flats?
It will not. ua-cam.com/video/fDhOrKvM7GU/v-deo.htmlsi=1p-Fx2m_5CFKgyBb&t=74