Thanks to Mike and Mike and Trish for making some really constructive suggestions. The decon was very mild, and the culprit seems to be the HDR transform that compresses the top end of the dynamic range. This is the step that brought out all the detail in the nucleus, but seems to have made the cores of the stars very hard as well. It also seems to have 'asterised' some of the detail in the blue parts of the arms as Mike and Trish noted - more so than the decon.
I'll have to get into the world of star masks to solve one problem without removing the other.
cheers,
Andrew.
Quote:
Originally Posted by strongmanmike
Yeah looks good Andrew, the colour is nice and at normal size view it looks quite detailed, well done. Some minor feedback and along the lines of the poster on AB and what M&T have said, the stars could be fixed so that they don't have a sharp bright centre and I suspect what ever has caused this (deco/wavelets etc?) has created some dottyness within the galaxy details too..?
Otherwise, a fine M83 
Mike |
Quote:
Originally Posted by Placidus
Andrew, that is a magnificent image. We particularly like the way you have preserved detail in the innermost bright core.
It is instructive to compare the core region and immediate surrounds in your image with the 6 megabyte version of the Hubble shot. Your basic structure is spot-on, whereas most folk just show a brilliant shapeless blob. All of us face a risk of converting nebulosity into nonexistent stars when deconvolving or wavelet sharpening, and you have a quite few in there, but for a millionth of the budget, your image of the core is quite the best we've seen.
Best,
MnT |