I have a STC Astro DUO Narrowband filter and was wondering whether anyone had any suggested workflows for processing data obtained using this filter and a OSC camera.
There are at least 2 ways I can see that this data might be processed:
Use the Ha-OIII color debayer algorithm and treat the data as a standard RGB dataset
Use the Ha-OIII mono, Ha-OIII extract Ha and Ha-OIII extract OIII algorithms to separate out mono (luminance?), Ha and OIII datasets for processing as bicolor or HOO
Method 1 above is pretty straightforward and this is how I have processed data so far.
What I am much less clear about is how I would use method 2 to generate separate but registered integrated mono, Ha and OIII files that could be combined using the combine tool or using other software? Any suggestions would be most welcome. At the moment, I can only think of selecting one of the debayer algorithms (e.g. mono) and running through all of the processes. After integration and the resulting file is saved, restart the whole process using the next debayer algorithm and repeat until all 3 files are saved. These may then need to be read back in for a final registration to make sure all are aligned. Is there an easier way?
This topic was modified 4 years ago 2 times by Mabula-Admin
Method 2) is preferred because you will be able to get much more and different colors in the bi-color composite.
It is quite stratightforward to accomplish what you want to do:
1) you will need the mono (for lum if you need/want is as well) and the extract algorithms
2) start with the Ha-OIII extract Ha (usually more signal so easier registration), process the data up until the Ha integration.
3) don't completely restart now
4) set the other debayer algortihm, for instance the Ha-OIII extract OIII,
5) now go to 5) normalize to normalize the OIII data. (no need to perform registration again, and this ensures the Ha and OIII integrations will be registered to each other)
6) Integrate the OIII data ,
The resulting integrations will be registered to each other thus are ready to load into the RGB Combine tool 😉
Let me know if this is clear and if you can follow this flow 😉
Method 2) is preferred because you will be able to get much more and different colors in the bi-color composite.
It is quite stratightforward to accomplish what you want to do:
1) you will need the mono (for lum if you need/want is as well) and the extract algorithms
2) start with the Ha-OIII extract Ha (usually more signal so easier registration), process the data up until the Ha integration.
3) don't completely restart now
4) set the other debayer algortihm, for instance the Ha-OIII extract OIII,
5) now go to 5) normalize to normalize the OIII data. (no need to perform registration again, and this ensures the Ha and OIII integrations will be registered to each other)
6) Integrate the OIII data ,
The resulting integrations will be registered to each other thus are ready to load into the RGB Combine tool 😉
Let me know if this is clear and if you can follow this flow 😉
Kind regards,
Mabula
Hi,
My workflow for most of STC duo narrowband images exactly as Mabula's reply, However, I've founded that even the default AAD algorithm also works well in many situations. It also has an advantage that we can use bayer drizzle integration with the image. Here is my result on Thor's helmet.
Method 2) is preferred because you will be able to get much more and different colors in the bi-color composite.
It is quite stratightforward to accomplish what you want to do:
1) you will need the mono (for lum if you need/want is as well) and the extract algorithms
2) start with the Ha-OIII extract Ha (usually more signal so easier registration), process the data up until the Ha integration.
3) don't completely restart now
4) set the other debayer algortihm, for instance the Ha-OIII extract OIII,
5) now go to 5) normalize to normalize the OIII data. (no need to perform registration again, and this ensures the Ha and OIII integrations will be registered to each other)
6) Integrate the OIII data ,
The resulting integrations will be registered to each other thus are ready to load into the RGB Combine tool 😉
Let me know if this is clear and if you can follow this flow 😉
Kind regards,
Mabula
Hi,
My workflow for most of STC duo narrowband images exactly as Mabula's reply, However, I've founded that even the default AAD algorithm also works well in many situations. It also has an advantage that we can use bayer drizzle integration with the image. Here is my result on Thor's helmet.
If you use AAD deabayering and set the integration mode to Bayer Drizzle, no debayering is done to create the integration (the data is debayered while performing star analysis and normalization, not for the actual integration) 😉 which is preferred !
If you set the mode to Drizzle, then debayering is done, and the debayered data is then drizzled, which is not ideal.
All seems to be working well using the method detailed by Mabula above. Just need to work out now whether there is any benefit from generating a mono image to use as a luminance layer or if just the Ha and OIII images have enough info. Also need to work out the best way to combine the individual images. Here are a couple of examples created using StarTools to process the APP integrations.
I am confused. I just downloaded the trial version and I am very new to processing. I captured frames (ARW files from my sony camera) with Duo Narrowband filter. I have a full spectrum A7S and use duo narrowband with that camera.
I saw the instructions, but I am confused. I load the light frames into the APP, and then what? When I select filter I can only select one band, not both Oxygen and H-Alpha.
Hi @tsk1979 did you try the above steps mentioned by Mabula? The option to extract one from the other can be found in tab(0) and scrolling down the list of the CFA algorithm.
To extract OIII (or Ha) from duo-narrow band filter is simple. Stay in Tab 0) Raw/Fits, under 'algorithm' pull menu. Find the menu 'Ha-OIII extract OIII' which is the lower most of the pull menu and select this. Then you can load duo narrow band files and process in normal routine. The final integration will be the stacked OIII.
1st Halpha then OIII and then combine the processed images. How to combine? Photoshop? Any tutorial links? I have always done standard RGB this is my first brush with NarrowbaND
