Enhancing Galaxies with H-Alpha: Adding Ha Data to RGB Images

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  • Опубліковано 23 гру 2024

КОМЕНТАРІ • 75

  • @raygorley9797
    @raygorley9797 3 місяці тому

    Thank you Rich, really appreciate all these videos supporting SIRIL. In the section For the final image shouldn't the B formula be
    B:B+... rather than
    B:R+...

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому

      Oh man how did I miss that?! You're correct the formula should be:
      B+Q*(HaCS-med(HaCS))*.2
      No wonder I was getting a bad result! Thanks for pointing that out!

  • @aaronwilliams3949
    @aaronwilliams3949 2 місяці тому

    Just used your method to add Ha to M33. Wow, this is awesome, thanks Rich! It worked flawlessly and I am very happy with the result.

  • @DrJ_MKE
    @DrJ_MKE 2 місяці тому

    Wow Rich !!! I had no idea it was this involved ! Thanks for the fantastic tutorial... again! This will be new territory for me as I've only done OSC with my astro-moded DSLR + either a CLS filter and now recently I've added dual narrow band. So I've never combined anything before. I was hoping all I would have to do was simply dump all the different subs (OSC and the narrow band images) into the lights folder and let Siril do it - but apparently not !! I just started collecting M31 last night, so I will be taking notes on this tutorial and putting them to good use. Thanks again.

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому

      Good luck with your project and thanks!

  • @Voyager20091
    @Voyager20091 Місяць тому

    Thanks for this excellent tutorial, because of you, I have been able to upgrade a little more my skills in astrophotography. And this was not the first time and problably not the last ! Thanks so much !!!

    • @DeepSpaceAstro
      @DeepSpaceAstro  Місяць тому

      I'm glad it helped! Thanks!

    • @Voyager20091
      @Voyager20091 Місяць тому

      @@DeepSpaceAstro Hi Rich, I have luminance data that I want to add to the receipt, (H-Alpha + RGB)...is there a script for this ? Thanks again :)

  • @meibergstrmandersen9181
    @meibergstrmandersen9181 3 місяці тому

    Interesting, even i am not at Ha + RGB level yet, I still learn watching the video. Rich is running one of the best channels around indeed.

  • @AstroAF
    @AstroAF 3 місяці тому

    Nice! Digging targeted adjustments! Really great continuum subtraction in SiriL demo, don’t think I’ve run across one before.

  • @aaronwilliams3949
    @aaronwilliams3949 3 місяці тому

    Thanks for all your work! It really makes life easier for me and the Ha addition to OSC is what I've been trying to figure out and you've done it for me, thanks! On another topic, I've had good luck using the Graxpert 10% stretch with the stars in when stretching galaxies. If I pull the stars prior to stretching it removes precious details. I can remove the stars later if needed and add them back with Affinity Photo. Sometimes I stack galaxies without calibration frames and it gives a good result, not always better but sometimes. I'm my own worst critic so I may process an image 3 or more times and use a totally different technique each time, especially when It's cloudy! Again, thanks for the excellent tutorials!

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому

      Thank you! Yes we are our own worst critics! That's what's nice about all of this processing. We can try different things, and see what works. There's usually more than one way to go about it!

  • @Rocketeer_777
    @Rocketeer_777 3 місяці тому

    Thank you Rich! The video I was anticipating for. Much appreciate it!

  • @jarnopeitso
    @jarnopeitso 3 місяці тому

    Perfect timing, I was just capturing OIII and HA of Andromeda last night to be combined in Siril with the data I took earlier with Optolong L-QEF.

  • @AstroDanno
    @AstroDanno 3 місяці тому

    Great video, Rich! Looking forward to trying this. I used Sirilic last time I tried to combine data, but I’d much rather do it all in Siril like this approach.

  • @T-Bear
    @T-Bear 3 місяці тому

    Amazing tutorial 🤘
    Thank you for sharing all your knowledge 🫡

  • @deepskydetail
    @deepskydetail 3 місяці тому

    Great video, Rich!!

  • @w8bya
    @w8bya 3 місяці тому

    New to your channel, really wonderful job you did. TU for sharing. As a fairly newb using PI I would love to see your take on this exact task using PI. Fair number of videos out there assuming you start out with NB filtered data but very few out there for us shooting with OSC cameras and filters like the L-extreme etc to get that Ha data.

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому +1

      I've been considering starting a PI series someday. Time will tell.

  • @azrayastrophotography2260
    @azrayastrophotography2260 3 місяці тому +1

    Nice video. I tried to do the same thing with M31 the other day, except I just loaded all my subs together in DSS with all the Flats and Dark Flats for each filter and let DSS sort them out. I used my LeNhance filter and a uv/ir cut filter with my Rasa 11 and Zwo 2600mc camera. It came out o.k. In the past I found if I use a Mono camera and use Ha filter with Green and Blue filter I get much better results. Give that a try. Cs, Ray

  • @MG-qj2zh
    @MG-qj2zh 3 місяці тому

    Very nice video... I might have a question about Seestar IR and LP filter workflow.
    Would you also suggest a workflow for separating the LP filters? Direct stacking of IR-Cut and Ha20nm and OIII 30nm is not recommended.
    How would you create the stack and implement channel separation. Do you have a formula for Pixelmath to put this together correctly?

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому +1

      I don't have a S50 to test with, but Siril comes with a script that will create not only the Ha like I showed in this video, but also the OIII.

    • @MG-qj2zh
      @MG-qj2zh 3 місяці тому

      @@DeepSpaceAstro 😁 struck with blindness
      # Renorm OIII to Ha using PixelMath
      pm $r_results_00002$*mad($r_results_00001$)/mad($r_results_00002$)-mad($r_results_00001$)/mad($r_results_00002$)*median($r_results_00002$)+median($r_results_00001$)
      save ../results/result_OIII_$LIVETIME:%d$s

    • @MG-qj2zh
      @MG-qj2zh 3 місяці тому

      @@DeepSpaceAstro Vielen Dank für die Antwort, leider ist meine Antwort mit dem siril Code entfernt worden. Ich habe das Script erst in den Tiefen der Linux Flatpak Verzeichnisse suchen müssen um es lesen zu können🤣.
      Ich habe das mit dem seestar script aufbereitet und beobachte die Effekte die ich damit erreiche. Die Q Parameter zeigen erst mit viel höheren Werten ein Ergebnis. Ich vermute aber da dies an dem OIII Teil liegt.

  • @CosmicTweaks
    @CosmicTweaks 3 місяці тому

    Wow, cool. today I just wanted to ask you, how would you do a combination of RGB + narrow-band images, and you've just published a video on it 🙂. Is the workflow very different for nebulae? Would it make sense to make RGB beside narrowband for nebulae? Does the RGB add any more detail to the narrowband stack? Maybe for the stars? I have just finished two sessions one with RGB one with Optolong, and I was wondering whether the RGB enhances anything. Keep up with the excelent job!

  • @dougiesmart1623
    @dougiesmart1623 3 місяці тому

    Another superb video there Rich 👏. I was just wondering if you have done a video for processing objects like M42 where you put in a shorter stacked image for it's core so it doesn't look blown out and the rest of the nebula must longer exposures to get the fainter nebulosity round the outside of the core. I hope my question makes sense and I look forward to your reply. Many thanks in advance. Dougie from Scotland

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому +1

      Thanks! Your question makes perfect sense, but no I haven't done that with M42. Last time I imaged it, I just used one exposure time and tried to balance things while stretching. I know others image with different exposures, so I might give that a try as well this year.

    • @dougiesmart1623
      @dougiesmart1623 3 місяці тому

      @@DeepSpaceAstro nice one Rich, many thanks for your reply. Your tutorials are first class and I'm enjoying copying your workflow and getting some good results 😄

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому

      @dougiesmart1623 Thank you!

  • @richardwills6930
    @richardwills6930 2 місяці тому

    Great video ,as always. I have one thought for those of us that can't afford two filters. Do you think it would be possible to get a similar effect by taking lights with osc camera and converting to monochrome, then adding lights to the monochrome taken with a osc camera with dual band filter?

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому +1

      The L-Pro I used for the RGB set isn't a requirement, so you only would need 1 filter (dual narrowband). Splitting the RGB into individual channels like I show in the video leaves you with 3 monochrome images. If you mean, can you just convert the RGB instead of splitting, then no I don't think that would work.

    • @richardwills6930
      @richardwills6930 2 місяці тому

      @@DeepSpaceAstro thanks , that's answered my question that I didn't know how to ask correctly. I didn't realise that splitting would leave monochrome images. So yes , one dual band filter would be sufficient. I'm just starting out on the more complex uses siril can be put to , tbh I wouldn't have a clue if it wasn't for your hard work 👍

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому

      Happy to help and thanks for the coffee!

  • @azrayastrophotography2260
    @azrayastrophotography2260 3 місяці тому

    I forgot to mention I use the Ha instead of the Red filter.

  • @KJRitch
    @KJRitch 3 місяці тому

    Would you expect the same results with an L Extreme filter? What OTA , mount and camera did you use? What were the exposure times? There seems to be a lot you can do with an OSC camera. I'll want to explore all these methods before deciding to go to mono. I find it hard enough to get enough integration with my OSC. With mono it would be so much harder. I know you are playing around with Pixinsight and I appreciate you doing thise videos using Siril, but do you think Pixinsigh would give you a much better result? I would probably switch to Pixinsight before moving to mono. Thanks again.

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому

      Yes any dual narrowband filter would work. Actually pretty sure this method would work with mono data as well. Used 8" EdgeHD with Hyperstar, Player One Poseidon-C, EQ6-R. 30s with the L-Pro and 60s with the IDAS, each equaling about 6.5 hours. This workflow is the same with the pixel math in PI, so no I don't think you'd get better results. With that being said, there are a lot more tools in PI that you could utilize, that may get you better results, but I haven't gone there yet.

    • @KJRitch
      @KJRitch 3 місяці тому

      Do you still have the AM5N or has the review period ended?

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому

      @KJRitch I do. I ended up buying it.

  • @jesuschrist2284
    @jesuschrist2284 3 місяці тому

    Great video again ty

  • @profahren8476
    @profahren8476 2 місяці тому

    since I don't (and can't because seestar S50) take calibration frames, can I just stack my duo band images normally, and then extract the red channel to use that as the Ha stack?

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому

      No because it would still just be the red channel. The script Siril provides uses pixel math to extract the Ha data.

    • @profahren8476
      @profahren8476 2 місяці тому

      @@DeepSpaceAstro the problem with the script is it won't run without calibration frames, even if I remove (put hastags behind) all of the lines in the script that look for calibration folders

    • @profahren8476
      @profahren8476 2 місяці тому

      @@DeepSpaceAstro I asked a Siril developer and he said that the script only extracts the red channel as Ha, and doesn’t use pixel math

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому

      Ah my apologies. I was looking at another script when I answered. They're using the extract_Ha command, and you can read about it in their docs. Regarding not being able to run the script without calibration frames... I modified the original script to allow that. Not a lot of testing, so let me know how it goes. 1drv.ms/u/s!Aii2lourR1D0gasbvF4WcnhtKvpOfg?e=wn0JNn

  • @brucesutherlin5375
    @brucesutherlin5375 Місяць тому

    I'm using Siri 1.2.4 when I go to Pixel Math and add the registered files, the variables assigned to each image file is 1_B, 1_G, 2_Ha and 1_R. If I change the variable name to B, G, Ha and R, the equation Ha-Q*(R-med(R)) fails because it doesn't recognize the first R. Is there a setting I am missing?

    • @DeepSpaceAstro
      @DeepSpaceAstro  Місяць тому

      It's case sensitive. Are you sure you're matching what you're using in the formula with the variable name? If so, then what's the error?

    • @brucesutherlin5375
      @brucesutherlin5375 Місяць тому

      @@DeepSpaceAstro thanks for replying.. Okay, here's what happened..Yes, I know that they are case sensitive, but is seems like the value of R is corrupt or something. I followed your video as closely as I could. In retrospect I actually got to where I had created the HaCS.fit file. I used a Q of .285 ... saved the file and went back into Pixel Math to use the formula R+Q*(HaCS-med(HaCS)) for R and a Q=3. When I went to apply the console would say that character 1 was invalid.. (I'm going on memory). So I thought I would start all over and redo the process. When I get to Ha-Q*(R-med(R)) the second time around, I get the same syntax error, but at character 7.. in reality the console says error on Ha-.285*(R-med(R)) at character 10. Does any of my explanation make sense? I was looking for a way to clear the register for R

    • @brucesutherlin5375
      @brucesutherlin5375 Місяць тому

      @@DeepSpaceAstro can I send you screen shots of my console and Pixel Math?

    • @DeepSpaceAstro
      @DeepSpaceAstro  Місяць тому

      Sure

  • @Chris-St-DE
    @Chris-St-DE Місяць тому

    Hi, I noticed that in GraXpert the image is flipped (top-down switched) is this a Bug?

    • @DeepSpaceAstro
      @DeepSpaceAstro  Місяць тому

      I don't know that it's a bug. The flip doesn't seem to effect the image as when opened in Siril it's not flipped like that.

  • @hipsterlt
    @hipsterlt 3 місяці тому

    can you share the formulas here also?

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому +2

      I added them to the description for you.

  • @clarencemumphrey
    @clarencemumphrey 2 місяці тому

    Hi Rich. Great video, as always! This is a dumb Noob question. Could you use the Ha data as the luminescence channel?👶

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому +1

      Thanks! You can try, but that will probably wash out the galaxy. It's ok to do that for nebulae though as I showed in this video. ua-cam.com/video/UiEeZ7KT_YQ/v-deo.html

    • @clarencemumphrey
      @clarencemumphrey 2 місяці тому

      @@DeepSpaceAstro It makes sense. Rich, you are the go-to guy for Siril. No one explains things so thoroughly. I look forward to your tutorials and reviews. Keep up the great work. I love the emojis, too.

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому +1

      Thanks so much Clarence! Really appreciate that! The emoji's rock! lol

  • @lietuvospatriotasnr1678
    @lietuvospatriotasnr1678 2 місяці тому

    How should i stack the ha if i dont do dbf?

    • @DeepSpaceAstro
      @DeepSpaceAstro  2 місяці тому +1

      You'll have to use SirilIC to stack if you don't have your calibration frames.

  • @clamdong1974
    @clamdong1974 3 місяці тому

    The problem ive had with this method is that my combined image ends up brightening the red colour noise all over the image

    • @DeepSpaceAstro
      @DeepSpaceAstro  3 місяці тому

      You can try denoising first, but using GraXpert to do that makes the AutoStretch view to overdone, so it may make it harder to see what you're doing during the continuum subtraction step.

  • @anata5127
    @anata5127 3 місяці тому +1

    Relatively easy to do in PixInsight.

  • @legacysearches4481
    @legacysearches4481 2 місяці тому

    Please slow down man! You talk like I’m watching at 5x speed. Sheesh! Slow it down to regular speed. I gotta adjust the play speed just to know what you talking about.