Quote:
Originally Posted by codemonkey
Hey S :-)
That's an interesting point about the presentation/stretch. If I do the same stretch for all of them one is going to be much brighter than the others (because it's exposure was 5 times longer), which I think might make it more difficult to compare noise. Having said that, a non-linear transformation probably isn't the best choice for presenting this either because it could have impacted the comparison.
This isn't background by the way, it's the edge of the brighter region of the nebula; it captures probably the strongest area of signal in the image and where it falls off a bit.
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Lee
Maybe linear fit applied before a stretch? Just for fun
