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Originally Posted by E_ri_k
Ok.......So been watching Harry's videos, multiple times. I'm slowly getting my head around things, although some things are not happening the way I want. Had a bit of trouble creating a light mask and inverting it before using the ATrous, so I ran the ATrous without the mask, don't know how that affects it.
I think its better colour, noise and background wise than my original, but the HDR tool seem to blur the image, and blow out the bright stars? It still needs sharpening, but not to sure how to do that well. Also couldn't save it in JPEG format through PI. When I did the image needed loads of streching in PS to view it and it looked crappy........so I screenshotted it!
Still nowhere near your's, but I think it's an improvment.
Erik
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Definantley an improvement.
HDR is a nice tool but it does have a problem: ringing.
Deringing works ok, except for stars.
To prevent your stars going crappy when using HDR, you will need to use a starmask (similar to a luminance mask) to protect the stars. PixelMath can be used to combine a star mask and luminance mask.
Star masks can be a right royal pain to get right so expect to play around with it and the sliders for awhile.
If you arn't get the detail needed in HDR, lower the layers. I normally dont go below 3 layers.
It shouldn't blur the image.
ATrousWavelet should be run at the end of you final image - just an FYI.
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When I did the image needed loads of streching in PS to view it and it looked crappy
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Did you apply cuvers and use histogram transformation in PixInsight?
The ScreenTransferFunction is a temporary screen stretch. If you close PixInsight or save the image and open it again, it wll be un-streteched.
Harry refers to this as having a linear and non-linear image.
In its linear state it will look dark. Once curves are applied, it will become non-linear.
Also, look into using AssignICCProfile option as i mentioned above, select sRGB (may be some more numbers etc after it, thats fine).
Preferably use AssignICCProfile at the beginning of processing the image.
Hope that helps.