Here’s a reprocess of my M20 Trifid Nebula LRGB and LRGB with Ha Accent in Startools with the following changes -
Optimised the dynamic range by creating a larger region of interest (ROI) around the main structure during the AutoDev stretch.
Also omitted the “Isolate” algorithm in the Super Structure module which exposed more detail , mainly in the background outside the main object.
The reprocess has definitely lifted the image a bit compared to the original
Startools “will not clip your data” even though the background on my images sometimes appears somewhat darkish.
See attached link to Startools and it’s AutoDev ( stretch ) for an understanding of how it works ( including reference to black point and clipping ) ……,
https://www.startools.org/modules/autodev
Attached revisions in LRGB and LRGB with Ha Accent ( original frame , Crop version and Super Crop version )
Astrobin links below for full resolution…….,
https://www.astrobin.com/rde4nn/
https://www.astrobin.com/j05tfu/
Thanks for looking
Comments Welcome
Martin