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Completely manual image processing in Siril 

BorealisLite
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29 окт 2024

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Комментарии : 81   
@landofdar
@landofdar 2 месяца назад
Really helpful video, thanks! Finally, I got something I like more than the “scripted” result
@BorealisLite
@BorealisLite 2 месяца назад
This is very dated now, but I'm pleased if it still helps. Siril is way more awesome now but the building blocks remain valid. Cheers
@landofdar
@landofdar 2 месяца назад
@@BorealisLite I've seen some features that caught my interest that have improved since this version, pairing the current documentation with this video helped a ton because my main issue was actually being able to visualize a workflow, so I'm really thankful I found your tutorial, thank you for sharing your knowledge ☺
@adrianbeadell9149
@adrianbeadell9149 Год назад
First time user of Siril and I've watched a few tutorials. Thankfully I stumbled yours, clear and precise, so many thanks.
@konstantinkomorowicz243
@konstantinkomorowicz243 2 года назад
I like the mood of your tutorials! Makes me feel like im in a classroom, in a good way!
@paulwhitton957
@paulwhitton957 3 года назад
Thank you for this video. Your careful and detailed explanation of how Siril works has helped me immensely. I processed the west veil nebula captured a few nights ago with my canon 5ds and canon 100-400 l lens and I’ve produced my best ever image. I followed your steps in this video to pre-process with calibration frames and stretched after in Photoshop. You are one of the best tutors I’ve found in the past year and I really appreciate the effort and time you must have taken in preparing your series of videos.
@BorealisLite
@BorealisLite 3 года назад
Thank you Paul, really glad that this helped !
@enidrajm
@enidrajm 2 года назад
Paul said everything I had planned on saying, so let me acknowledge him and acknowledge you, Gary. : )
@Dazzyt66
@Dazzyt66 3 года назад
As a newbie to AP and processing and using Linux, Siril is now my goto for stacking and pre-processing. This tutorial is by far the best I have seen and explains everything really well - Ive just processed my first few subs of M82 and although I need to work on better captures I am very pleased with the result for a first attempt! Thank you SO much for taking the time to do this to help others like me. 👏🏻
@BorealisLite
@BorealisLite 3 года назад
Thank you for your kind words. Everything I have learned comes from other members in the community, and that led to the ability to recognize the power of the effectiveness of certain knowledge. That is what this channel was about, and will continue to be. It is my attempt to bring something back to the community, and I look forward to the day when you and others who started here can do the same. Cheers
@giuseppececere9815
@giuseppececere9815 3 года назад
Great tutorial Gary, very educational and plenty of insights. Please continue your great job !
@BorealisLite
@BorealisLite 3 года назад
Thank you, appreciated !
@davidrobertson4530
@davidrobertson4530 3 года назад
Thank you Gary. I've been looking at Siril for a while now - your series of videos has explained a few things I was having problems with.
@clifforddw
@clifforddw 3 года назад
Hi Gary, Thank you this is an excellent Video to explain how the automated process is working and especially how to remove some of the unwanted lower quality images. Well done and thank you for sharing your insight,.
@BorealisLite
@BorealisLite 3 года назад
Thanks! I think it is a good thing to understand what is happening under the hood, especially if you will be creating/modifying scripts. Regards
@rajmdalvi
@rajmdalvi 2 года назад
Only video on internet which explains in a simple and detailed way to manual preprocess / Siril. Thanks Gary it will also be of great help if you could make video like this for image processing tools /siril Thanks again.
@jrterrier
@jrterrier 3 года назад
Hi Gary, that’s great thank you very much, exactly what I was hoping for. I’m glad you left in the gremlins with the description boxes in Siril getting in the way - if it happens to me I won’t be panicking.
@BorealisLite
@BorealisLite 3 года назад
Thanks Michael, that has only happened twice and I was running screen recording both times. Hopefully that is what caused it. Regards
@sbklb1
@sbklb1 3 года назад
Thank You for the excellent video. I just did a review of Siril for the astrophotography group in my area, and only focused on the scripted methods. I have pointed them to your excellent video series on Siril for the advanced examples.
@BorealisLite
@BorealisLite 3 года назад
Hope it helps, appreciate your comment.
@nicklamendola8489
@nicklamendola8489 3 года назад
Thanks, this was very helpful!
@jonbasstro1413
@jonbasstro1413 3 года назад
Another well presented video about SiriL.Following your series has converted me to using SiriL.l’m new to the hobby and imaging mainly with a tracked Canon DSLR and old screw fit lenses from the 1970’s but still getting reasonable results.Keep up the good work,I hope your channel will really take off.Thanks again.
@BorealisLite
@BorealisLite 3 года назад
Thanks Jon, my 135 & 200mm primes are also from the late 70's. In some ways they are perfect for astro. But I attribute the quality of my images to Siril's linear processing steps.
@jonbasstro1413
@jonbasstro1413 3 года назад
Hi Gary. I agree totally,I’ve seen a big difference in my results from using SiriL and following your process.I’ve heard using a Skylight filter with old lenses may help against the chromatic aberration they suffer. I’ve now got one on order to try out on my Chinon 200mm screw fit.
@BorealisLite
@BorealisLite 3 года назад
@@jonbasstro1413 That sounds very interesting... pls share any insights with us at the time. Would like to hear of this!
@jonbasstro1413
@jonbasstro1413 3 года назад
@@BorealisLite I will keep you updated on how it goes with the skylight filter.Intention is to shoot a nebula for 60-90 mins with and without the filter on the same night.Will try and link above/below where I came across it.
@BorealisLite
@BorealisLite 3 года назад
Thanks for this, I have also found darkTable (free alternative to Lightroom) has some ability to isolate & desaturate CA. It is on my list to do a RU-vid about. Regards
@ahmedelmorsy8429
@ahmedelmorsy8429 3 года назад
Excellent tutorial.
@astronomynotebook
@astronomynotebook 3 года назад
Thank you Gary…I am a fan of Siril and Gimp as I would like to stay in 32 bit processing as much as long as possible in post processing.
@jonbasstro1413
@jonbasstro1413 3 года назад
Hi Gary, quick update on previous chat. I purchased a Hoya Skylight 1B filter for my 200mm lens.Last night l managed to do a 10second star test on Capella.With this particular test I preferred the image without the filter,the image appeared slightly sharper as well. With the filter in place the image produced more internal reflection on the final result and I saw no difference with the CA unfortunately,thinking maybe because the 3/4 moon in the sky didn’t help with some internal reflections.During daylight use and x10 zoom on a distant object the filter provided a much improved image.The filter did clear up a lot of CA.More star tests on a dark night required I think.
@BorealisLite
@BorealisLite 3 года назад
Thanks for sharing your results. I looked up the filter, apparently it subdues blues (warming). So maybe helps with the blue CA, at the cost of letting in less light. Would be interested to hear your comment after a dark night test. Best of luck!
@jonbasstro1413
@jonbasstro1413 3 года назад
@@BorealisLite Hi Gary, I think that sounds about right on what you commented on.Will keep you updated. Regards.
@jonbasstro1413
@jonbasstro1413 3 года назад
Hi Gary, I did the star check with and without the skylight filter under a moonless sky with a 200mm lens. Unfortunately I could see no improvement in the image. However,I have discovered another method in my search that would hopefully improve my star and ultimately DSO images,this is using “step down rings.” My 62mm aperture 200mm lens using the step down rings has been operating at 49mm and even 37mm aperture,in doing this the camera lens can operate on its F stop fully open,the stars have been virtually pinpoint with little to no CA.This has improved my imaging results over the last few nights and the loss of aperture does not appear to effect the final outcome.Worth a try. Cuiv The Lazy Geek explains it in the following. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-D78P1h_a50Q.html
@BorealisLite
@BorealisLite 3 года назад
@@jonbasstro1413 Thanks for this idea! Sounds very good, even if it may mean more subs. That would take less time than trying to effectively process the CA. My regards, going to try this next chance!
@jonbasstro1413
@jonbasstro1413 3 года назад
@@BorealisLite Look forward to hearing back how that goes for you.I’ll be using the step down rings on my old lenses from now on.All the best.
@chrisheyward6430
@chrisheyward6430 2 года назад
Hi Gary new to astro & SIrIL so big learning curve ahead for me.when people say add previous data from another night, i presume all settings must be the same ie aperture,shutter,iso am i correct..looking forward to your Orion video as only managed to capture that thus far.with only camera & 135 lens
@BorealisLite
@BorealisLite 2 года назад
Hi Chris, I do realize the learning curve is huge with all of this. It comes in steps, eventually becomes manageable. Some people do shoot targets over multiple nights to get enhanced data. One strategy is to use the same settings and to just get more subs. For high dynamic range subjects like Orion many shoot longer exposures for the nebulosity & dust but also short ones for a core that is not blown out. Then a blend using aspects from each. With a cooled astro cam on a scope we can re-use dark frames of the same exposure length & gain. But we need new flats and flat darks. With a dslr on a prime lens the opposite is kind of true. Darks are unique to the sensor temp while shooting, but so long as there are no new dust spots on the lens, the flats and biases can be used across sessions. Truthfully, in the winter when it is cold, I never used darks with my dslr. Instead I would just use biases to calibrate the lights. So my biases would go into both the "darks" and "biases" folder in Siril. To address your question, the images from each session need to have close to the same framing for stacking reasons, and if you do use calibration frames then each session should have its own as required. At that point they can be preprocessed with their calibration frames, then gathered until done, and finally registered and stacked as a group. In this way images with different ISO or exposure times can be stacked together if appropriate. In all truth, until Siril becomes second nature I would use the groups feature of Deep Sky Stacker to keep it simpler. You can place the images from each session in a DSS group with its calibration files, and it will align & combine the sessions properly. At that point the output file can be opened in Siril for operations like background extraction, color calibration, & stretching prior to export for further work. If you have a short exposure set for the core of Orion, it can be put in a group with none of the images selected while you are stacking the longer exposures, then all of them selected but none of the others for stacking the short exposure group. You would use the original reference frame to get matched alignment. The nebula will be well illuminated without shooting over multiple nights, if you are going for a wide field with Barnard's loop etc, then more time may be justified. I hope this is helpful. There are a lot of RU-vid vids about each aspect of this I have mentioned. I think the key is to take on one thing at a time until it all makes sense. And keep every raw sub, you may want to go back and reprocess or add in the future. 🙂
@chrisheyward6430
@chrisheyward6430 2 года назад
Thank you so much for your reply .keep up the great tutorials really appreciated
@johnnyhsieh0208
@johnnyhsieh0208 Год назад
The tutorial is very useful for me. Appreciate !!! 🙏 Otherwise, Siril 1.2.0 beta was released recently (maybe you have known 🙂).
@BorealisLite
@BorealisLite Год назад
Thanks Johnny. Version 1.2 is pretty big, it has a lot of new & improved features to learn. I'm still trying to work out an optimal workflow for most of them...
@johnnyhsieh0208
@johnnyhsieh0208 Год назад
@BorealisLite I am learning too, but I am a newbie of Siril. Look forward to your great tutorial ! 🙂
@BorealisLite
@BorealisLite 3 года назад
Hi, I am responding to a comment/question sent by Erik de Klerck. For some unknown reason it shows up in my notifications, but not in my view of the active comments that I can respond to. Erik asks about Sirilic, a standalone interface that allows compilation of Siril scripts, and runs them. It does somewhat automate the task of preprocessing lights with their respective calibration frames from multiple sessions. I now use a dedicated cam, so use library master darks and flat darks. For me it is easier to just create a new master flat manually for each session, and then to calibrate with those masters. I can gather the preprocessed lights from each session & register/stack them as a group at any time. As such it seems unlikely that I will use Sirilic, but that is because of a complete understanding of Siril's normal interface. If anybody wants help creating new scripts for unique situations I do encourage you to look at Sirilic. It is well documented. My regards
@yervantparnagian5999
@yervantparnagian5999 Год назад
A wonderful video. May I ask what the benefit is to do this manually instead of just using a script?
@BorealisLite
@BorealisLite Год назад
Thanks, I was asked to do this so some could better understand what happens under the hood, so to speak.
@anthonygossop8140
@anthonygossop8140 Год назад
Followed this guide up to the cut at 22:00 twice to make sure I didn't miss anything but both times I have B/W but no RGB after pre-processing. What am I missing?
@BorealisLite
@BorealisLite Год назад
Right beside the "Start pre-processing" button there is a debayer before saving check box. That is the most likely thing.
@thomasvanbever741
@thomasvanbever741 9 месяцев назад
Would you like to make a video on the vision behind switching between the colorchannels and rgb when you edit in siril? I do not really get why you choose a certain color channel to select a dark area etc?
@TheNarrowbandChannel
@TheNarrowbandChannel 3 года назад
These are fantastic! Do you do any mono work? I shoot a lot with Mono and would love to see the process with that.
@BorealisLite
@BorealisLite 3 года назад
Thanks! I have not yet done mono, just upgraded to a ZWO OSC cam. I do believe that Siril is capable though. You could run each set to a stacked final, and then try RGB Compositing from the image processing dropdown. There is an alignment tool in there, and room for a luminance channel. From the command line there is also a command called linearalign. It takes the open image and aligns it to the reference image that you enter as a parameter. I have never tried either from my dslr history, but if you recognize these tools you may be ready to use them. Siril also has a function to split Ha and O3 from a dual filtered set, if I ever get some clear sky witn no moon I am planning to shoot a galaxy with the l-pro and with the l- extreme and try to mix the Ha channel from the Extreme with the RGB from the l-pro. But not there yet! Best of luck.
@TheNarrowbandChannel
@TheNarrowbandChannel 3 года назад
@@BorealisLite Yes it is. I will get that figured out once I fully understand these scripts. Looks like you should be able to build your own script for any custom configuration you want.
@BorealisLite
@BorealisLite 3 года назад
@@TheNarrowbandChannel Indeed. When you run your mono images you could use the same darks & dark flats (bias) for each channel. Just need unique lights & flats for each filter. If you look in a text editor at the script files you can see how they work. I would just have a flatR folder, a flatG, a flatB, and a flatL folder for the flats. Then you could open/Save AS the full processing script and just change the folder references in the flat section of the script, remove the debayer & osc commands in the preprocessing section, and change the ouput file name in the stacking command for each new script you create.
@astronomynotebook
@astronomynotebook 3 года назад
Is there a typical ratio between the number of frames of darks , flats and biases that we should make in order to correctly and effectively preprocess our data?
@BorealisLite
@BorealisLite 3 года назад
Hi, one of my vids earlier talked about calibration frames in more depth, but in short 25 to 30 will do 80% + of what thousands can do. I would never go beyond 40, there are diminishing returns. 🙄
@astronomynotebook
@astronomynotebook 3 года назад
@@BorealisLite thank Gary…you are so kind to make such a speedy rep,y. 😊
@jfn480427
@jfn480427 3 года назад
Hello I saw your videos at you tube and decided to give Siril a try, but at the pre-processing the lights I have nothing but black screens; I posted the question at the blog but no clear way to solve this, bad thing , any help you can provide will be very much appreciated!!
@BorealisLite
@BorealisLite 3 года назад
Hi Jose, very dark frames are normal depending on the capture. They are linear, or as shot. We calibrate, stack, & do some processing in the linear state. Siril has a button in the lower center where you can choose a view. If you choose autostretch it will show you a stretched version of any image without actually stretching it. This is powerful because you can see what you are doing while remaining linear. It is covered in some of my earlier vids in this playlist. It is my hope that is what you need. Regards
@jfn480427
@jfn480427 3 года назад
Thanks Gary, this sets of lights that I am processing were processed with pix insight with no problems by myself, the Siril testing error is when y try to preprocess the lights applying the darks and flats, I am following your steps one by one and everything is ok until I preprocess the lights, somebody told me they is because I am subtracting twice the bios, I don’t know how if I am following your preprocessing steps one by one, your videos are excellent, but I can’t continue thank you so much for your time, I wonder if I can send some screen prints with my results, if it’s possible
@BorealisLite
@BorealisLite 3 года назад
@@jfn480427 Thanks for getting back to me. I can't explain it, but if you have pix & it's working for you then I think you are good to go. I am curious but the only way to send big files is by link sharing from Google drive or similar. If you want to do that pls feel free but not obligated. Regards!
@astronomynotebook
@astronomynotebook 3 года назад
So Gary as you mentioned to me I am able to preprocess and stack separately as separate stacks my images from different cameras….I would like like to use cameras of APS-C and 4/3 size…would that be ok for Siril?….also when I then proceed to combine those separate stacks from the different cameras I imagine I have to just register them together and them simply stack…do I use one as a reference for registration and is there something else that I have missed?😊
@BorealisLite
@BorealisLite 3 года назад
Hi, you could certainly try that, but for best integration I would actually try calibrating all your sets into a large group of preprocessed lights & register them all at once. If that succeeds, then stack. If not there is the option to stack each set and to try to stack the stacks. If this fails maybe put a few subs from each set on google drive & I can make a short video about it...
@astronomynotebook
@astronomynotebook 3 года назад
@@BorealisLite thank you Gary for your speedy reply 😊
@astronomynotebook
@astronomynotebook 3 года назад
Siril works on seq …and how would I be able to get more than one seq at a time to be registered together….to my understanding it can only register one seq at a time…is there a way…please tell me how😊
@BorealisLite
@BorealisLite 3 года назад
@@astronomynotebook Hi, I assume at this point that you have preprocessed & debayered all your lights with appropriate calibration frames, and that you have several sequences like pp1_light.fit, pp2_light.fit etc. in the process folder. At this point you could delete or move all other files from the lights folder, and from the process folder. Then drag all the preprocessed lights into the lights folder, add all them all to the conversion list in the conversion tab, and convert them. They don't need conversion, but this will create a new sequence with them all in it. From there go straight to registration. If Siril can find common alignment stars, they should all get registered, ready for stacking... Because of the differing image scales there will be significant stacking artifacts to crop out, but all shared areas should be there. Hope this helps!
@astronomynotebook
@astronomynotebook 3 года назад
@@BorealisLite yes it does and you are very kind to have helped…please consider joining my Astronomy Notebook FB Group facebook.com/groups/350767592003671/
@jackdeangelis6585
@jackdeangelis6585 3 года назад
Gary, thanks very much for this walk-through of Siril, I learned a lot of details that had escaped by attention previously. I'm looking forward to your other videos. Subscribed. On a completely unrelated topic - I noticed in the background that you have a portable a/c unit. How is that working for you? We have a small room that needs a/c and are debating between a unit like yours or ductless mini-split. Any insight would be appreciated. Thanks.
@BorealisLite
@BorealisLite 3 года назад
Hi Jack, mine is for the few hot days we get, I just set it to about 27C and it dehumidifies to a tolerable level. If you need heavier use, I would get something that does its hot air exchange outside, this one blows interior air outside all the time it's running & creates a vacuum that draws humid air in everywhere else. That is less than ideally efficient. Cheers
@jackdeangelis6585
@jackdeangelis6585 3 года назад
@@BorealisLite Gary, thanks for this. I did not understand how these units worked. Pulling air in from the outside is NOT what we want. Last September we went through a week-long period when we could not open windows because of wildfire smoke (western Oregon). It was terrible. I decided to create a safe room that had a/c with no outside air exchange and a hepa air filtration system. The ductless mini-split satisfies the a/c part of the system but I was looking for an easier/cheaper solution. Thanks very much for you input. Clear skies.
@gregsuskin7366
@gregsuskin7366 3 года назад
Thanks Gary. Nice video. Question. Stacking in Siril looks rather complicated. If you stack an image in DSS then transfer it to Siril for processing, will the program still have all its same functions? I assume you'll have to convert the TIFF file to a FITS and you're good to go?
@BorealisLite
@BorealisLite 3 года назад
Hi Greg, your idea is completely valid. I started using Siril by opening tif files from dss & going from there. I think dss can also generate fit file format stacked images too. Also, this is the manual process. Siril is much easier when using scripts as described in my earlier vids. This one came about from requests from some who wanted to look deeper. Cheers
@gregsuskin7366
@gregsuskin7366 3 года назад
@@BorealisLite Great. I'll try it. Thanks so much.
@paulschulze882
@paulschulze882 2 года назад
Would it be possible to add a number to the title of the videos so that the order in which to see them is clear?
@BorealisLite
@BorealisLite 2 года назад
Sure, will look at that tomorrow. Cheers
@MRCAGR1
@MRCAGR1 2 года назад
I have different size images despite all camera settings being the same.
@BorealisLite
@BorealisLite 2 года назад
Hi, that's very little information to go on but the first thing that comes to mind is that a dslr will switch to portrait mode from landscape or vice versa as a cam rotates, unless that is turned off in cam settings. Also when you convert from cam raw to fits the dimensions can change a bit. They all should have the same conversion applied. I have to go to work for 14 hrs now, can respond further after that if needed. 😊
@MRCAGR1
@MRCAGR1 2 года назад
@@BorealisLite I went through the online manual for my camera, and the difference, is because of the difference between the selected aspect ratio 3:2 instead of 16:9 or vice versa.
@BorealisLite
@BorealisLite 2 года назад
@@MRCAGR1 That would do it. On my Nikon I don't recall even having that setting when shooting raw, but hopefully that will allow you to move forward now. Regards
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