How to add luminance to RGB in PixInsight
Vložit
- čas přidán 20. 07. 2024
- In this video we look at how to add luminance to RGB in PixInsight.
#astrophotography #PixInsight
If you're passionate about astrophotography like I am, consider subscribing to my channel!
Buying new astro gear and would like to help support this channel? Please consider using this affiliate link for OPT bit.ly/32m61vd
I'll receive a small commission from each sale and you'll have my thanks!
Follow me on:
visibledark.ca
visibledarkastro
visibledark_
visibledark_astro
Some of my gear...
Skywatcher Esprit 100 F5.5 Triplet refractor telescope bit.ly/36w1F7Y
Raptor61 bit.ly/3m4Jb5e
William Optics Zenithstar APO refractor telescope bit.ly/2JRM1tR
Moravian G3 16200EC CCD w/ 5 position FW bit.ly/2PL0qvK
QHY168C 16mp cooled cmos camera bit.ly/2NkkKTb
QHY268C 26mp cooled cmos camera bit.ly/37OeYS5
Optolong L-eXtreme filter bit.ly/2VLvEF4
Optolong L-R-G-B 2" filters bit.ly/32a9Gfu
Optolong L-eNhance filter bit.ly/32a9Gfu
Optolong L-pro filter bit.ly/32a9Gfu
Triad Quadband Ultra Filter bit.ly/2CbQXWh
Skywatcher EQ6 mount bit.ly/2C9lap1
Skywatcher Star Adventurer bit.ly/2C9Fwyi
Pegasus Astro Focus Cube bit.ly/2qonGow
Pegasus Astro Pocket Powerbox Advance bit.ly/3aTBUiO
Orion Starshoot Autoguider bit.ly/34z6pbh
Feel free to subscribe for more videos! ;)
Man I am so glad I came across your channel in December. I've been processing images for about 2 years now and have learned so much from your videos on Pixinsight that have taken my images to another level. Keep posting and I'll keep watching and learning.
Thanks Shawn. Your channel is one of the best.
A very helpful tutorial, Shawn. thanks for taking the time to put it together.
Interesting..... you truly have a way of running through these tutorials that make these processes not so intimidating have to ģive this a try. Never added a lum layer to my OSC images. Thanks!
Got to give this stretch technique a try
thank you, as a complete novice to pixinsight i find videos like yours very helpful, i hope to try this soon :)
Glad it was helpful!
Hi.
Did not know this method for stretching.
I have to try it. Seems very nice for the stars and the color.
Thank’s a lot for this video and clear skies.
JM.
Yes it does help preserve stars and colour nicely. Give it a try! Thanks for watching and clear skies!
I’ve been doing Astrophotography since July and learned a lot along the way from your videos. Thank you!
Great to hear!
I’m so glad that you produced this! I just finished my first OSC image, and now I want to try LRGB, but I didn’t know where to start since I’ve used PI only once. Thank you!
Glad I could help!
This looks really good! Must give it a try!
Thanks for another great video!
Thanks Phil. Cheers!
Excellent video Shawn.
Thank you. Glad you liked it!
Thanks Shawn another excellent presentation . I have not tried the ArcinhStretch method before but I will definitely be giving it a try later today. Thanks again and clear skies to you
Thanks for tuning in Trevor! Clear skies to you as well.
@@VisibledarkAstro My star colour is significantly better using this method
Interesting method, I will have to try it. I've been having the same problem with Luminance channel just washing out the colour-rich RGB image
Good video Shawn! I found arcsinhstrech is good, but I do little bit of histogram stretch first and then use arcsinhstrech which may work out favorably
Thanks for the comment Ray! I'll give this a try as well. Cheers!
Useful as always Shawn. What would make it even better would be a side by side comparison of the different stretches. Especially what the shape of the luminance histogram is like with both methods. Again a side by side.
Great suggestion!
You deserve way more subscribers. Your videos are great. 👍 Thank you
I think so to! lol. Maybe I can get Trevor from Astrobackyard to share some subscribers with me... he's hoarding over 200,000 of them! :P
The subscribers will come! As they progress from other channels subjects, they will stumble on your channel as I did and stay stuck to it waiting for new videos to come out! Keep up the good work. I definitely value it!
Great video, Shawn. I've used arcsinhstrech for all my images since it was introduced. However, for adding L to RGB, I extract the L from the RGB. Then with Linear Fit using the Lum channel as reference, I apply it to the extracted RGB L so they are the same. You then combine the extracted RGB to the RGB image by channel combination using the CIE L*a*b* color space with just the extracted L checked and referenced. Sounds like a lot of steps but it's not. Using this method, I never have to guess if I have the fiddle with sliders to get the right look.
Thanks for the tips Paul!
Nice video Shawn.
Thanks Craig!
Nice video Shawn. I have been using Arcsinhstretch for a while, but usually combine it with Histogram Transformation or maskedStretch. I will have to give this method a try, it seems to preserve colours better than the methods I have been using. I found using Repaired HSV Separation prior to using Arcsinhstretch produces awesome star colours.
I've heard Repair HSV Separation does work well for star colours. I have to give that a try!
@@VisibledarkAstro It works great, best to use it just after DBE.
Nice vid Shawn.
Thanks!
Excellent Shawn, I never used the Arcsine before but will on my next image. Also, I have been separating my color images and then unclicking the RGB button then adding in the Lum, R, G, B. I never thought of just leaving the color image alone and just adding in the Lum. I wonder how many other needless steps I do... Cheers
Glad the video was helpful! Thanks for watching. Cheers!
I like your videos, but I'm a little confused about this one.
Does your RGB image come from a color camera or from combining R,G and B from a monochrome camera??
thanks,
Monty
This is super helpful, Shawn! U may have covered in another tutorial, but how did you get your initial RGB and initial Luminance to be perfectly cropped/aligned identically? I shot my luminance on a different night and so the two initial images are definitely not identically framed. Is there an easy way to get the 2 starting pictures perfectly pre-aligned?
Tom, I had the same problem, but I'm starting from ground zero, so here goes....I used the dynamic crop and just entered in the exact same numbers for the x and y axis. I dont know what you'd do with alignment, though...Paul
Will this work if I used a one shot color camera, processed it and then extracted the luminance from the image?
hola buen dia amigo... es muy bueno tu trabajo..pero yo le agregaria algo..... si me permites. separaria las estrellas de la imagen con star_net y luego trabajaria en toda la informacion que tiene esa imagen para rescatar toda la nebulosidad de informacion que tiene.. todo con curvas en pasos pequeños y muchos.. y luego realzanso la flama con seleccion de rango. y ya terminada le agrego la mascara de estrellas de star net. y esa imagen quedaria increible...saludos
were the 2 images processed with blurX, noiseX, Spp before you combined them.
Hi....may I ask in your stacked photo, did you do the debayer and color correction processes already?
Yes I did. The masters I was using were prepared in advanced.
Hello my friend