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View Full Version here: : NGC4945 after IceInSpace comments-advice


Enrique
04-04-2010, 12:38 AM
List of comments from IceInSpace

Green cast:

Fixed by adjusting the green curve and saturation in PS.

Stars lost their colour and look unnatural:

This was a problem with the sharpening that bleached the stars. I am now using the high pass filter + desaturation in PS.

Background too black, unnatural:

Fixed by changing the black point plus “lighter” curve in PS.

Jpeg artefacts:

No idea what to do. Please advice.

I also tried to improve the galaxy so it “jumps” out of the picture. I changed the clipping parameters in DSS (DeepSkyStacker) to force it to reject more data and select only the pictures with a FWHM less than 4.9. Result: smaller stars and crispier details better for sharpening. 10 hours of data gives lots of room for manoeuvring.

Please send more comments and thanks for looking,

Enrique

TrevorW
04-04-2010, 09:56 AM
IMO slightly overprocessed

I'd go back to the original data and start from scratch

check out Ken Crawfords site has some great tutorials on processing

http://www.imagingdeepsky.com/

Ken
05-04-2010, 09:21 AM
The stars look much better with some colour in them.
Clear skies forever Ken.

Paul Haese
05-04-2010, 03:19 PM
The star colours are ok, but the galaxy has a green cast where the blue stars should be. The image other than the galaxy looks good.