M81-M82 in LRGB with AP 130EDFS (Rodolphe Goldsztejn)

M81-M82 in LRGB with AP 130EDFS

Revision title: Slight final noise reduction...

Pour comparer avec la même image réalisée avec la Meade 127 (https://astrob.in/ggj82i/0/), quelques mois auparavant.

Cet ensemble est assez difficile à traiter - les couleurs en particulier, la tentation est grande de pousser les curseurs.

J'ai essayé de lui conférer une tonalité "naturelle".

Il n'y a "que" 8.5 heures d'intégration, poses de 10 minutes sur chaque filtre LRGB.

Post-processing:

* Réduction de bruit linéaire

* déconvolution légère sur la couche L

* calibration des couleurs LRGB

* montée d'histogramme (c'est la partie la plus difficile!)

* réduction du bruit non-linéaire

* assemblage LRGB avec augmentation de la saturation

* finalisation par augmentation du contraste

Original
B
C
D
Final
E

B

Description: Re-processed

Uploaded: ...

C

Description: Trying different options to get the best balance; here, less saturation but slightly more details.

Uploaded: ...

D

Title: Processing revisited from the ground up

Description: [FR] En regardant mes images précédentes avec un oeil plus critique et plus exercé grâce à l'expérience acquise, la tentation est grande de les reprendre. Cette paire de magnifiques galaxies méritait un meilleur sort, que j'espère avoir réussi - je suis reparti des mêmes images calibrées pour pouvoir facilement comparer les progrès en matière de traitement pur. Vos commentaires sont les bienvenus. Belles fêtes de fin d'année à tous.

[EN] Looking at my previous images with a more critical and practiced eye thanks to the experience gained, the temptation is great to revisit them. This pair of beautiful galaxies definitely deserved a better fate, which I hope I've achieved - I started with the same calibrated images so I can easily compare the progress in pure processing. Your comments are welcome. Happy Holidays to all.

Uploaded: ...

E

Title: Slight final noise reduction...

Uploaded: ...

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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
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Noctilucent clouds
Landscape

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Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
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Status	Advanced success
Started	...
Astrometry.net job	6818197
PixInsight job	WWCECND193U4WEEP7UPSS48ROE1DGWHF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h56m00s.44
RA (top/left)	10h01m18s.90
RA (top/right)	10h01m12s.79
RA (bottom/right)	09h50m24s.85
RA (bottom/left)	09h51m05s.61

Dec (center)	+69°18′00″.8
Dec (top/left)	+68°41′35″.7
Dec (top/right)	+69°55′21″.6
Dec (bottom/right)	+69°53′36″.2
Dec (bottom/left)	+68°40′06″.1

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