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So with the first new datasets I have received, my first attempts at unguided narrowband image processing (that is, with no one who knows what they are doing looking over my shoulder). Just a quick couple of versions using the Hubble palette.
Not great, but hey - it's my first time.
We captured equal amounts of Ha, O3 and SII, but the bulk of the signal is in the Ha. There was some in the S2, but very little that could be seen in O3. I found it difficult to stop an SHO image being entirely green, but I could not find another mapping that gave me a reasonable starting point.
I might try some bicolour images with just Ha and SII.
Anyway, I have made a start. Onwards and upwards.
Not great, but hey - it's my first time.
We captured equal amounts of Ha, O3 and SII, but the bulk of the signal is in the Ha. There was some in the S2, but very little that could be seen in O3. I found it difficult to stop an SHO image being entirely green, but I could not find another mapping that gave me a reasonable starting point.
I might try some bicolour images with just Ha and SII.
Anyway, I have made a start. Onwards and upwards.
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Hi Richard,
Oops, I got that wrong. I should have said NGC7822 and not the Veil.
As a matter of interest, when you used LinearFit, what channel did you select as the 'master'? I've seen recommendations that suggest using the strongest stack and others recommend using the weakest.
Whatever you chose has worked out fine anyway. I'll leave that dataset for now and await the rest of the data.
Cheers,
Ray
Oops, I got that wrong. I should have said NGC7822 and not the Veil.
As a matter of interest, when you used LinearFit, what channel did you select as the 'master'? I've seen recommendations that suggest using the strongest stack and others recommend using the weakest.
Whatever you chose has worked out fine anyway. I'll leave that dataset for now and await the rest of the data.
Cheers,
Ray
Ray
Roboscopes Guinea Pig
Hi Richard,
Oops, I got that wrong. I should have said NGC7822 and not the Veil.
As a matter of interest, when you used LinearFit, what channel did you select as the 'master'? I've seen recommendations that suggest using the strongest stack and others recommend using the weakest.
Whatever you chose has worked out fine anyway. I'll leave that dataset for now and await the rest of the data.
Cheers,
Ray
I used OIII as the master reference. The twin problems are (as I understand it) if you Linearfit to the Ha you increase the noise from the other filters. If you Linearfit to OIII or SII you reduce the Ha signal, meaning you have to stretch the combined image further. Certainly, the overall signal in the Channel Combination was so low that some tools like Local Histogram Equalisation freaked out and Photometric Colour Correction just refused to work at all.
I'll have a play with a few more options over the coming days.
Honestly
It's self assigned as I prefer being the unassuming engine behind the scenes and have since a teenager refered to myself as the "Teaboy" in my proffesional life
It's better to be humble and keep under the radar in my opinion!
It's self assigned as I prefer being the unassuming engine behind the scenes and have since a teenager refered to myself as the "Teaboy" in my proffesional life
It's better to be humble and keep under the radar in my opinion!
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
Honestly
It's self assigned as I prefer being the unassuming engine behind the scenes and have since a teenager refered to myself as the "Teaboy" in my proffesional life
It better to be humble and keep under the radar in my opinion!
Doesn't really work. Everyone knows the mild-mannered self-effacing person in the background is secretly the superhero!
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Sorry guys,
Never intended to cause any disharmony within the crew guys. You all get my vote.
An anchor? More like the engine room with you at the helm.
Ray
Never intended to cause any disharmony within the crew guys. You all get my vote.
An anchor? More like the engine room with you at the helm.
Ray
Ray
Roboscopes Guinea Pig
Sorry guys,
Never intended to cause any disharmony within the crew guys. You all get my vote.
An anchor? More like the engine room with you at the helm.
Ray
You never Ray, I was letting Phil know he is invaluable to the project
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
As I always say colour is subjective, however for me personally you have a far more appealing colour & tonal range to this image
Steve
PS
Phil got spell check working on my PC with the forum so I will be a simple buffoon rather than spelling like an imbecile. My sentences may finally make more sense to the rest of you
Steve
PS
Phil got spell check working on my PC with the forum so I will be a simple buffoon rather than spelling like an imbecile. My sentences may finally make more sense to the rest of you
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
As I always say colour is subjective, however for me personally you have a far more appealing colour & tonal range to this image
Steve
PS
Phil got spell check working on my PC with the forum so I will be a simple buffoon rather than spelling like an imbecile. My sentences may finally make more sense to the rest of you
Thanks Steve. I also prefer this one. I am not sure I know what I am doing, but this looked OK so I stopped. Wish I knew more!
I added some O3 and S2 to this project to get the recommended balance so we now have 240 sec x Ha:30 - O3:45 - S2:60.
I have reprocessed the data from scratch and ended up here:
Cropping gives a more interesting image:
There is probably more that could be done (it was a sort of processing random walk), but I think these are quite nice.
I have reprocessed the data from scratch and ended up here:
Cropping gives a more interesting image:
There is probably more that could be done (it was a sort of processing random walk), but I think these are quite nice.
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Richard,
That's fabulous. The cropped version is the one I prefer, with less background to distract from the main target. Some interesting shapes there. To be honest it's not something I've had much interest in before, having seen a few not so inspiring images posted in magazines. This though, a definite for the gallery I reckon. Just hope I can get something close.
Regards your other post, I've had many frustrating times loading images to the forum believe me. Often it's the size, or it's Photoshop messing with the image's exif data, not the forum itself.
Cheers,
Ray
That's fabulous. The cropped version is the one I prefer, with less background to distract from the main target. Some interesting shapes there. To be honest it's not something I've had much interest in before, having seen a few not so inspiring images posted in magazines. This though, a definite for the gallery I reckon. Just hope I can get something close.
Regards your other post, I've had many frustrating times loading images to the forum believe me. Often it's the size, or it's Photoshop messing with the image's exif data, not the forum itself.
Cheers,
Ray
Ray
Roboscopes Guinea Pig
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