Hello and welcome! I would like to ask everyone who uses Siril for processing astrophotography images to share their insights. I've seen videos discussing impressive scripts like LRGB, HaLRGB, HOO and HaRGB. My experience has been primarily with light frames, so I only know about preprocessing without calibration frames. Can someone explain how these scripts work? Can they be applied during the preprocessing stage, or do they only function after the image has already been preprocessed? Additionally, what is the purpose of these scripts? I would appreciate any context or information about them. Thank you!
How Does The LRGB, HaLRGB And HOO Scripts is works?
Well Written Respectful Engaging
I haven't seen any of the scripts you're talking about but all the scripts I've used in Siril work the same way. In most cases you will need a full set of calibration frames. The scripts will fail if the correct folders containing that needed calibration frames are not found. You'll see instructions when a script runs as to what its requirements are. All the scripts I know about are for pre-processing but they don't have to be, depends on the script.
Hi, the best channel for information on that scripting usage and all other Siril matters is Deep Space Astro on youtube https://www.youtube.com/@DeepSpaceAstro.
I only used HA script till sofar. But you need Ha filter to shoot Ha data before you can process that. Same for the other stuff.
I only used HA script till sofar. But you need Ha filter to shoot Ha data before you can process that. Same for the other stuff.
Tony Gondola:
I haven't seen any of the scripts you're talking about but all the scripts I've used in Siril work the same way. In most cases you will need a full set of calibration frames. The scripts will fail if the correct folders containing that needed calibration frames are not found. You'll see instructions when a script runs as to what its requirements are. All the scripts I know about are for pre-processing but they don't have to be, depends on the script.
Ah, so wait, if the script doesn't say that u need the calibration frames, does it mean it's free to use whatever u like? Because I saw those scripts from the website or site from Telescope Live. And one of the scripts hasn't mentioned any kind of calibration frames. So it means that I could go with that script to see how it works with my light frames, I guess?
Szia Áron !
A scripteknek semmi köze a kalibrációs képekhez.
Maximum annyi, hogy van olyan script, amihez nem kell egyáltalán kalibrációs kép.
Tulajdonképpen a scriptek különböző feldolgozási módokat takarnak, hogy milyen algoritmussal rakja össze a képeidet.
A kérdésedben szereplő LRGB, HaLRGB, HOO feldolgozást az imege processing menüből az RGB compositing, vagy a Pixel math alatt tudod összerakni.
A Hubble matic, vagy az extract Ha_OIII script szín csatornákra bontja a képet és ezeket tudod kombinálni.
Nagyon érthető videók vannak a youtube-on erről.
A scripteknek semmi köze a kalibrációs képekhez.
Maximum annyi, hogy van olyan script, amihez nem kell egyáltalán kalibrációs kép.
Tulajdonképpen a scriptek különböző feldolgozási módokat takarnak, hogy milyen algoritmussal rakja össze a képeidet.
A kérdésedben szereplő LRGB, HaLRGB, HOO feldolgozást az imege processing menüből az RGB compositing, vagy a Pixel math alatt tudod összerakni.
A Hubble matic, vagy az extract Ha_OIII script szín csatornákra bontja a képet és ezeket tudod kombinálni.
Nagyon érthető videók vannak a youtube-on erről.
Concise
WIL VREE:
Hi, the best channel for information on that scripting usage and all other Siril matters is Deep Space Astro on youtube https://www.youtube.com/@DeepSpaceAstro.
I only used HA script till sofar. But you need Ha filter to shoot Ha data before you can process that. Same for the other stuff.
I only have a seastar telescope.
Is it capable of doing Ha images by itself?
I saw somewhere that people said Seastar can produce somehow Ha from its built-in light pollution or duo Band filter.
If it's true, then I don't need any filter for that. Right?
Szijártó Áron:Tony Gondola:
I haven't seen any of the scripts you're talking about but all the scripts I've used in Siril work the same way. In most cases you will need a full set of calibration frames. The scripts will fail if the correct folders containing that needed calibration frames are not found. You'll see instructions when a script runs as to what its requirements are. All the scripts I know about are for pre-processing but they don't have to be, depends on the script.
Ah, so wait, if the script doesn't say that u need the calibration frames, does it mean it's free to use whatever u like? Because I saw those scripts from the website or site from Telescope Live. And one of the scripts hasn't mentioned any kind of calibration frames. So it means that I could go with that script to see how it works with my light frames, I guess?
That's right, in fact there is a script that doesn't use calibration frames so all you need are your lights. It's also pretty easy to do that manually without a script as well.
Tony Gondola:Szijártó Áron:Tony Gondola:
I haven't seen any of the scripts you're talking about but all the scripts I've used in Siril work the same way. In most cases you will need a full set of calibration frames. The scripts will fail if the correct folders containing that needed calibration frames are not found. You'll see instructions when a script runs as to what its requirements are. All the scripts I know about are for pre-processing but they don't have to be, depends on the script.
Ah, so wait, if the script doesn't say that u need the calibration frames, does it mean it's free to use whatever u like? Because I saw those scripts from the website or site from Telescope Live. And one of the scripts hasn't mentioned any kind of calibration frames. So it means that I could go with that script to see how it works with my light frames, I guess?
That's right, in fact there is a script that doesn't use calibration frames so all you need are your lights. It's also pretty easy to do that manually without a script as well.
Okay, so since I am using a Seastar telescope, which is all I can have. I wondering if it could do Ha and OIII frames. Its website says it has a dual Band filter that kind of has an HA and OIII filter, which can be turned on and off. I honestly haven't used that filter option in the seastar, cause I had no idea what else it does for me until now.
Well, there is a Siril script for processing SeeStar data as well as a script for extracting Ha and Oiii data if using a dual band filter.
https://www.youtube.com/watch?v=syCVl1fDLTk&t=2s
https://www.youtube.com/watch?v=syCVl1fDLTk&t=2s
Well Written Concise
Szijártó Áron:WIL VREE:
Hi, the best channel for information on that scripting usage and all other Siril matters is Deep Space Astro on youtube https://www.youtube.com/@DeepSpaceAstro.
I only used HA script till sofar. But you need Ha filter to shoot Ha data before you can process that. Same for the other stuff.
I only have a seastar telescope.
Is it capable of doing Ha images by itself?
I saw somewhere that people said Seastar can produce somehow Ha from its built-in light pollution or duo Band filter.
If it's true, then I don't need any filter for that. Right?
I do not know about Seestar since I do not have one. I think there are special groups on facebook for Seestar S50 and maybe dsiscord? Or perjhaps even here in astrobin. Success
The HA/[OIII] script, which is what you use with a duo-band filter, which is what the SeeStar light pollution filter is, does need calibration frames.
However, the scripts are just simple text files that call Siril commands one after the other. So what you can do is copy the existing OSC_Extract_HaOIII script to a new file, then edit it and remove the steps for which you do not have data (and adjust the remaining steps, so they do not fail on the bits that are now missing).
All the steps are generally documented in the script, so it's relatively easy to mess with them.
I will also note that with a SeeStar you can in fact get darks, flats and biases, for a much better end result. The trick is to find where the SeeStar saves those, so you can copy them and use them in Siril.
However, the scripts are just simple text files that call Siril commands one after the other. So what you can do is copy the existing OSC_Extract_HaOIII script to a new file, then edit it and remove the steps for which you do not have data (and adjust the remaining steps, so they do not fail on the bits that are now missing).
All the steps are generally documented in the script, so it's relatively easy to mess with them.
I will also note that with a SeeStar you can in fact get darks, flats and biases, for a much better end result. The trick is to find where the SeeStar saves those, so you can copy them and use them in Siril.
Helpful
The HA/[OIII] script, which is what you use with a duo-band filter, which is what the SeeStar light pollution filter is, does need calibration frames.
However, the scripts are just simple text files that call Siril commands one after the other. So what you can do is copy the existing OSC_Extract_HaOIII script to a new file, then edit it and remove the steps for which you do not have data (and adjust the remaining steps, so they do not fail on the bits that are now missing).
All the steps are generally documented in the script, so it's relatively easy to mess with them.
I will also note that with a SeeStar you can in fact get darks, flats and biases, for a much better end result. The trick is to find where the SeeStar saves those, so you can copy them and use them in Siril.
Wait a second. I need to process this information. Are you saying that the SeeStar can actually create calibration frames? I initially thought it was impossible to obtain any calibration frames. Now I'm intrigued! I definitely want to find out where these frames are located, as I can only see light frames in the external storage. It’s possible those calibration frames are hidden, since Windows can sometimes conceal important files. Or if not then it should be somewhere else.
Szijártó Áron:
definitely want to find out where these frames are located, as I can only see light frames in the external storage.
So apparently I'm wrong and the SeeStar automagically processes each saved FIT with a dark and bias frame, so you don't need to do that again separately. Because the sensor is so small, a flat is not needed (there is no vignetting).
Which means all you should need to do is the steps from the HaOIII script without any of the pre-processing. I just hacked up the script and ran this locally, works fine and gives me a vignetted result file when I combine the Ha and OIII results using RGB compositing. If you have problems with bright blue flares, use the Ha file as luminance layer.
OSC_Extract_HaOIII_Without_DBF.ssf
Pop that file in the Siril scripts directory restart siril, put your lights in a `lights` subdirectory in the Siril working directrory, run the script, tadah!
Helpful
Szijártó Áron:
definitely want to find out where these frames are located, as I can only see light frames in the external storage.
So apparently I'm wrong and the SeeStar automagically processes each saved FIT with a dark and bias frame, so you don't need to do that again separately. Because the sensor is so small, a flat is not needed (there is no vignetting).
Which means all you should need to do is the steps from the HaOIII script without any of the pre-processing. I just hacked up the script and ran this locally, works fine and gives me a vignetted result file when I combine the Ha and OIII results using RGB compositing. If you have problems with bright blue flares, use the Ha file as luminance layer.
OSC_Extract_HaOIII_Without_DBF.ssf
Pop that file in the Siril scripts directory restart siril, put your lights in a `lights` subdirectory in the Siril working directrory, run the script, tadah!
Oh yeah makes sense. Flats only happen if the camera sensor is bigger; these are most likely the ones that can be used for very high-value telescopes. So it's basically like tricking the system by changing the script data?
However, I would be interested if there could be a way to obtain the dark and bias frames out of seastar and re-process them in Siril.
Szijártó Áron:
if there could be a way to obtain the dark and bias frames out of seastar
The post I found on the ZWO forums suggests no; it only creates a single "master" offset image that contains dark *and* bias in one, and then uses that to process all lights. You might be able to get that single master offset, but I don't know how.
I may find out if and when I get a seestar (soon :-)