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Originally Posted by JohnH
can you give us some processing details.
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Hi John,
Now that would be telling...
.. Seriously I don't do much processing of the images at all. The key is to get as many minutes of exposure as possible. These could do with more. I get longer exposures by stacking many shorter shots and in this case 10x3min or so.
The more shots you can get the better the noise in the final stacked image. Less noise = more push in processing. The only calibration I do is dark frame subtraction. Should do flats as well, but I just haven't bothered so far.
In terms of processing, I mainly concentrate on getting the levels right for each RGB channel. Basically "stretching" the image to raise the black point above the level of background fog, and dropping the white point to a level so that brighter areas are not burnt out. This gives me the most improvement.
Then each individual image will respond to different "other" processing. I do a combination of the following...
- Colour Balance
- Unshape Mask
- Contrast & Brightness adjustment
- Curves (sometimes).
And that's about it. Sometime I finish an image off in Noiseware to reduce the noise, but if you have enough RAW images this shouldn't be necessary.
There are many better techniques than the ones I use, and someone like Eddie T could explain these. I haven't investigated any advanced techniques mainly because...
1. I'm Lazy
2. I can do the above quickly. Usually process an image in ~5mins.
3. I'm happy with what I get.
Hope this helps...
Cheers
) suggested I image NGC5189. He said I'd like it. And like it I did. This is one cool little planetary! Followed it up with NGC6302 (Bug) Nebula and NGC6822 (Barnard's) Galaxy.
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