I'm starting with PI so I've asked on FB group which file should I use after ABE and I've get a recommendation to see this hint. Stunning result! It will be a strong point in my reprocessing workflow, that I'm creating for myself. Thank you for sharing :) And I need to watch all your movies :)
If you forget to save the process, you can just go to the history on the image after the first run, double click on the DBE entry, and change to "subtraction". This process rock and has been working reliably for me.
I have been reading and watching videos on how to process an image in Pixinsight for at least 5 months, but to be honest your way always proved to be the most effective way. Thank you very much, the quality of my pictures improved big time!
Many thanks, Shawn - we'll give it go! Your presentation method is so easily digestible, and that, in particular, is appreciated by us older imagers! Cheers!
I am new to PI - just bought software this week and my friend Marty Anderson recommended you. I think you were at Starfest this pas August - I was there also for first time. Thank you for making DBE so simple!
Wow! I thought I had seen everyone of your videos but I actually missed this one. Very pity cause this method is brilliant!!! Thank you very much for sharing Shone! You are the best🙂
This video is the most useful one that I have seen in a long time (well about two years). It’s a valuable guide to background extraction. It has worked well for me. Thanks for passing it along.
I saw your suggestion to use a very large sample radius in a previous video, and it was a game changer for my DBE results, so a big thank you! I use a radius of 150 to 200 pixels.
Worked like a charm! Working on Orion from Bortle class 9 skies and I was in a pickle trying to get rid of the gradient with ABE, and DBE with small boxes. Thank you Shawn!
Hey Shawn, this past week, in lockdown in Australia, I have been watching so many videos on DBE as I really want to move away from ABE. So you have saved me a lot of pain in trying to understand and get into it with confidence! Cheers John
Brilliant video and tip on DBE. Just had a break from post processing an image in PI and watched this video during a cup of tea. Started the post processing from scratch and much better with these DBE settings so thanks for sharing👍
Excellent video. Works very well. I just tried an image with significant nebulosity from a light polluted area. Did not have any of the strange stuff going on that I normally would.
Hi Shawn, happy new year and thanks a lot for this old but fantastic video that help me a lot to understand that I was doing wrong with DBE since a lot of time.
Great video. Currently using the trial license. Just processed Andrimeda yesterday following your Lpro walk through. Really considering getting a full license.
Hi Shawn, Thanks for much for working this tutorial. Learned a couple of key things: (a) generation - was going crazy adding them manually - (b) the explanation about tolerances - wow, a must a never used it before, and (c) doing "division' followed by subtraction - I will try that. I will check out your channel but love to have you doing snippets like this on the different tools... always hands on like this one though - So GREAT job, and Thanks!
Your videos and tutorials are of great help to me, one question in my PI changing my sample radius to 100 it goes crazy, some number around 20 is equivalent of your 150, am I missing something? greetings from Monterrey, Mexico
Hi Jose - Not sure off hand but one idea may be the sample point size problem could be due to the dimension of your image? Smaller image scale may require using a smaller sample point radius value. I've also found that after inputing the sample radius value and clicking resize all, it also helps to click "generate" as well and it adjusts the sample point box size.
I hope the translator does a good job! This technique is very interesting, but I have a doubt: usually on all tutorials it is recommended that the points of sampling must NOT contain any stars, because the stars create a disturbance that would ruin the DBE's work, and there are a lot of stars here! How do you explain this? Thank
So this method only works if you stack within Pixinsight? Loading an image from an outside software like DSS gives a green image where it practically forces you to use ABE first.
Thank you. But when I click on the sample boxes I want to remove, they just highlight, not go away.
Před 4 lety
For color images I think you should have done background neutralization first to see the gradient better. Subtracting the background when the green channel is spiked like this can affect SNR on green channel.
Před 4 lety
My bad, on second view, I see that you applied division before subtracting, it will still affect the SNR of the green channel, just not as much. I think color calibration/background neutralization is a must before background modelization.
Hi .... I have been using your suggestions for doing DBE for some time now and really like the results ... Thanks! However ... I have just upgraded to PI v1.8.8-8 and I find that I can't delete the central grids any more .... the delete key just doesn't do anything :-( I can only add each grid individually. Do you have any suggestions????
I tried applying your process to an image of M42 but on the subtraction step, I got an error that DBE couldn't be applied because the instance has less than 3 background samples defined even though I can see and manipulate many more sample areas?
Interesting. Were the sample boxes all (the default) green or were some red? They all need to be green. If they were all green and you still have this problem, best would be to share a download link with me for the master you are trying to apply DBE to. I can look at it on my end and see whats up.
I dont dispute that your method here seems to work fine, but I'm still scratching my head because i've just watched like five DBE "howto" videos...and each one is vastly different in the values used, and where to put sample points, which size they are, etc. Really not an intuitive tool to use lol
This completely failed for me. Going carefully step by step. First of all, how do you delete a sample square? I had to manually place them around the edges. I started off with a very big gradient using RGB image of M51. Half the sky blue, half the sky green. I have a large city LP source on the green side. After division, you got a fairly nice dark image. I got a fully green image (improvement over 2 tone). When I reapplied the DBE icon, having switched to subtraction, I had strong gradient and also vignetting. An unusable result. I had high hopes for this as I continually fall into the trap of double stretching after DBE, getting blotchy colors all over the image instead of a clean result. I will try it again here, had high hopes for fixing this image. Should I crop the image first? No clue.
After applying the division, I get the black screen with the big red X's around the edge (so far so good), then I close DBE and reset STF (bottom right corner of STF process), then restretch with nuke icon. Right here, I get the splotchy colors all around which people tell me is the result of over stretch. I reapply the DBE icon, switch to substraction, reapply. The yucky blotchy colors again.
That is surprisingly effective. Note that it doesn't matter too much if there are some>/i brighter stars in the sample boxes, as the samples are weighted according to their "quality". Of course, if all the sample down one side are not good, then the DBE will do stuff that you don't want to happen! ;)
Please consider subscribing to my channel for more videos! Clear skies! 🙂
I'm starting with PI so I've asked on FB group which file should I use after ABE and I've get a recommendation to see this hint. Stunning result! It will be a strong point in my reprocessing workflow, that I'm creating for myself. Thank you for sharing :)
And I need to watch all your movies :)
Of all the DBE tutorials, this has been the most effective! Thank you!
Agreed
If you forget to save the process, you can just go to the history on the image after the first run, double click on the DBE entry, and change to "subtraction". This process rock and has been working reliably for me.
I have been reading and watching videos on how to process an image in Pixinsight for at least 5 months, but to be honest your way always proved to be the most effective way. Thank you very much, the quality of my pictures improved big time!
You're very welcome!
Newbie with PI and been struggeling with DBE about a week with awful results. Suddenly it all works. Thank you!
Super! 👍
Many thanks, Shawn - we'll give it go! Your presentation method is so easily digestible, and that, in particular, is appreciated by us older imagers! Cheers!
I gave this a try on the data I captured this week, and I’m totally blown away with the results! Thank you for sharing!
Glad it was helpful!
So helpful! I've tried various DBE techniques on an Andromeda image I'm processing and this has produced the best result by far. Thanks!
I am new to PI - just bought software this week and my friend Marty Anderson recommended you. I think you were at Starfest this pas August - I was there also for first time. Thank you for making DBE so simple!
Wow! I thought I had seen everyone of your videos but I actually missed this one. Very pity cause this method is brilliant!!! Thank you very much for sharing Shone! You are the best🙂
This video was a lifesaver. Struggling with some vignetting on the Soul Nebula. The larger sample radius’ did the trick. Love your videos!
Larger samples make perfect sense. Great info for someone such as myself that is going to purchase Pi.
This video is the most useful one that I have seen in a long time (well about two years). It’s a valuable guide to background extraction. It has worked well for me. Thanks for passing it along.
Your PixInsight videos are excellent! Thanks for making these to help us newbies out!
I saw your suggestion to use a very large sample radius in a previous video, and it was a game changer for my DBE results, so a big thank you! I use a radius of 150 to 200 pixels.
Awesome! I'm glad it helped and DBE is working well for you! Cheers.
Worked like a charm! Working on Orion from Bortle class 9 skies and I was in a pickle trying to get rid of the gradient with ABE, and DBE with small boxes. Thank you Shawn!
Hey Shawn, this past week, in lockdown in Australia, I have been watching so many videos on DBE as I really want to move away from ABE. So you have saved me a lot of pain in trying to understand and get into it with confidence! Cheers John
Excellent! Glad this was helpful. Cheers!
Your PI videos are definite "must watch" videos!. I do something similar, but am going to try this method for sure.
Thanks again!
This method works much better than the smaller boxes across the whole image. Thanks for the tip!
Brilliant video and tip on DBE. Just had a break from post processing an image in PI and watched this video during a cup of tea. Started the post processing from scratch and much better with these DBE settings so thanks for sharing👍
Yes it really worked very well. I had a RASA image with an uneven vignette, and this worked to remove it. Many thanks :)
Thanks a mil for the advice you give, the way you explain, the results we achieve...
Excellent video. Works very well. I just tried an image with significant nebulosity from a light polluted area. Did not have any of the strange stuff going on that I normally would.
Awesome! Glad it helped. Cheers.
This was really helpful! Liked and subscribed! Thanks!
Awesome, thank you!
Fantastic and so much more effective and easier than manipulating lots of small squares around stars👍🏻
Hi Shawn, happy new year and thanks a lot for this old but fantastic video that help me a lot to understand that I was doing wrong with DBE since a lot of time.
Thank you for this good video..clear skies!!
You're welcome! Clear skies to you as well!
Hi Shawn!
Thanks again for a great video!
Glad you enjoyed it
Great video. Currently using the trial license. Just processed Andrimeda yesterday following your Lpro walk through. Really considering getting a full license.
Very good informations/video as usual Thanks for your job
Great info again thank you. I always use DBE but never used division so that's good to know. Many thanks.
excellent Pixinsight videos, not to long and to the point 🥇🥇🥇
Hi Shawn, Thanks for much for working this tutorial. Learned a couple of key things: (a) generation - was going crazy adding them manually - (b) the explanation about tolerances - wow, a must a never used it before, and (c) doing "division' followed by subtraction - I will try that. I will check out your channel but love to have you doing snippets like this on the different tools... always hands on like this one though - So GREAT job, and Thanks!
Very helpful video!
Thanks Shawn
Really appreciate your tutorials
Keep up the fantastic work
Cheers from Oz!!
Thanks for watching! Cheers!
Wow! great way to do DBE without placing all the small sample points and still getting a nice background extracted image. Thank you
Thanks a lot! Your DBE method is much better than ABE! And it's easy!
Great video. Hope to try this metod in late August or Early September for M31. When dark skies comes back to sweden. Clear skies.
Hi Andreas! Thanks for watching. I hope this DBE technique is helpful when you get dark skies again. Cheers.
Absolutely amazing video and a completely different take on DBE. Thank you for creating this video. Stay Safe.:)
Thanks for this video. Now I understand how to use DBE!
Awesome! Good luck and clear skies!
Thanks Shawn! DBE tutorial Works a treat very helpful.
Fantastic Tam. So glad it helped. Clear skies!
Thanks Sean. Was excellent.
That was awesome! Easy and very effective! Added to my workflow! Thank you!
Awesome! Glad it was helpful. Cheers.
Definitely "useful and helpful!" Very clear and straighforward. Thanks a lot!
Genius! Thank you, and what wonderful images you take to work on.
This was great and solved a very tough issue I was having with uneven field illumination and vignetting.
great video
Great tutorial! Thanks!
Fantastic tutorial, thanks Shawn 👍🏻
You're welcome! Thanks for watching. Cheers.
Thanks again ..another excellent tutorial
Thanks Trevor!
Awesome 👏 thanks for sharing this 🔭📸
Wow. Awesome! many many thanks
Very useful and easy process. Thank you!
Wow awesome all my images looked like that I will give this a try thanks !
I hope it works for you! Clear skies!
Such a good tutorial 👏😊
Worked Great! Thanks!😀
Thanks very much Shawn!
You're welcome! Cheers.
Oh my god. This is terrific
Great tutorial!
Awesome tip, mate. Subscribed. Gonna watch ur Star mask technics as well :)
Great! Glad it helped. Cheers!
Thank you for this helpful video Shawn!
This is really informative and echos Ron Brecher my mentor! Sounds verbatim actually.
Fantastic - thank you so much.
Helped lots. Thanx much
Your videos and tutorials are of great help to me, one question in my PI changing my sample radius to 100 it goes crazy, some number around 20 is equivalent of your 150, am I missing something? greetings from Monterrey, Mexico
Hi Jose - Not sure off hand but one idea may be the sample point size problem could be due to the dimension of your image? Smaller image scale may require using a smaller sample point radius value. I've also found that after inputing the sample radius value and clicking resize all, it also helps to click "generate" as well and it adjusts the sample point box size.
I hope the translator does a good job!
This technique is very interesting, but I have a doubt:
usually on all tutorials it is recommended that the points of
sampling must NOT contain any stars, because the stars create a disturbance that would ruin the DBE's work, and there are a lot of stars here!
How do you explain this?
Thank
Thanks for another great video
I have had good luck with ABE if I increase box separation to 20.
WONDERFUL!!!
Thanks for sharing this!
So this method only works if you stack within Pixinsight? Loading an image from an outside software like DSS gives a green image where it practically forces you to use ABE first.
Thanks! This was super helpfup
Thank you. But when I click on the sample boxes I want to remove, they just highlight, not go away.
For color images I think you should have done background neutralization first to see the gradient better. Subtracting the background when the green channel is spiked like this can affect SNR on green channel.
My bad, on second view, I see that you applied division before subtracting, it will still affect the SNR of the green channel, just not as much. I think color calibration/background neutralization is a must before background modelization.
DBE neutralizes the background. Background neutralization is useful in a narrowband workflow and after DBE. For OSC its not really necessary. IMO.
Excelente vídeos you do ! TOP ! thanks
Thanks! Clear skies!
Muchas gracias master
could you do some videos show how to do HDR like M31 or some bright object?
Hi Charles, I'll see what I can do! Thanks for the suggestion. Cheers.
I don't have any flats. Only lights and darks. Will this work?
It will work but having flats will help and make the image better.
Is it OK for my sample points to overlap?
Hi .... I have been using your suggestions for doing DBE for some time now and really like the results ... Thanks! However ... I have just upgraded to PI v1.8.8-8 and I find that I can't delete the central grids any more .... the delete key just doesn't do anything :-( I can only add each grid individually. Do you have any suggestions????
I tried applying your process to an image of M42 but on the subtraction step, I got an error that DBE couldn't be applied because the instance has less than 3 background samples defined even though I can see and manipulate many more sample areas?
Interesting. Were the sample boxes all (the default) green or were some red? They all need to be green. If they were all green and you still have this problem, best would be to share a download link with me for the master you are trying to apply DBE to. I can look at it on my end and see whats up.
@@VisibledarkAstro I tried it again this morning while watching your video again and didn't get the error.
good
I dont dispute that your method here seems to work fine, but I'm still scratching my head because i've just watched like five DBE "howto" videos...and each one is vastly different in the values used, and where to put sample points, which size they are, etc. Really not an intuitive tool to use lol
This completely failed for me. Going carefully step by step. First of all, how do you delete a sample square? I had to manually place them around the edges. I started off with a very big gradient using RGB image of M51. Half the sky blue, half the sky green. I have a large city LP source on the green side. After division, you got a fairly nice dark image. I got a fully green image (improvement over 2 tone). When I reapplied the DBE icon, having switched to subtraction, I had strong gradient and also vignetting. An unusable result. I had high hopes for this as I continually fall into the trap of double stretching after DBE, getting blotchy colors all over the image instead of a clean result.
I will try it again here, had high hopes for fixing this image. Should I crop the image first? No clue.
Found the X to delete sample square
After applying the division, I get the black screen with the big red X's around the edge (so far so good), then I close DBE and reset STF (bottom right corner of STF process), then restretch with nuke icon. Right here, I get the splotchy colors all around which people tell me is the result of over stretch. I reapply the DBE icon, switch to substraction, reapply. The yucky blotchy colors again.
That is surprisingly effective. Note that it doesn't matter too much if there are some>/i brighter stars in the sample boxes, as the samples are weighted according to their "quality". Of course, if all the sample down one side are not good, then the DBE will do stuff that you don't want to happen! ;)