NGC 281 Pacman Nebula (HOO) (Alessandro Curci)

NGC 281 Pacman Nebula (HOO)

Revision title: Riduzione stellare

Ormai vedo sempre più HOO e SHO che stanno prendendo il largo , forse proprio per il contrasto tra i segnali che spesso in Rgb vengono soffocati dall'Ha che è sempre più preponderante rispetto all'oiii, e che quindi in Hoo vengono maggiormente evidenziati . Poi con i nuovi filtri che non sono altro che dual band o meglio Bicolor, come L-Ultimate, è solo questione di assegnare le giuste percentuali tra le due emissioni. Questa foto per esempio proviene da un Rgb classico rinforzato dai canali narrow del filtro L-Ultimate prelevando l'Ha , l'Oiii e anche la luminanza. Successivamente , sempre in lineare ho riassegnato le percentuali dei canali con PixelMath andando a rinforzare l'Oiii rispetto all'Ha (Rapino). I passaggi successi in Ps hanno poi aggiunto vividezza, contrasto e varie altri livelli di estetica. Sono ancora in fase di studio del procedimento ma mi sembra già buono

Now I see more and more HOO and SHO taking off, perhaps precisely due to the contrast between the signals which in RGB are often suffocated by the Ha which is increasingly preponderant compared to the OIII, and which are therefore more highlighted in HOO. Then with the new filters which are nothing more than dual band or rather Bicolor, like L-Ultimate, it is just a question of assigning the right percentages between the two emissions. This photo for example comes from a classic RGB reinforced by the narrow channels of the L-Ultimate filter taking the Ha, the Oiii and also the luminance. Subsequently, always linearly, I reassigned the percentages of the channels with PixelMath, reinforcing the Oiii compared to the Ha (Rapino). Successful PS steps then added vividness, contrast, and various other layers of aesthetics. I'm still studying the process but it already seems good to me

Original
B
Final
C

B

Title: HOO rielaborata quasi da zero

Uploaded: ...

C

Title: Riduzione stellare

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	8590738
PixInsight job	8FYS3M0L0UMMZ3N27GZVT4JDE3I1B8KJ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h52m32s.183
RA (top/left)	00h50m56s.267
RA (top/right)	00h49m52s.408
RA (bottom/right)	00h54m05s.466
RA (bottom/left)	00h55m15s.177

Dec (center)	+56°37′26″.82
Dec (top/left)	+57°06′39″.43
Dec (top/right)	+56°14′17″.38
Dec (bottom/right)	+56°08′10″.00
Dec (bottom/left)	+57°00′23″.37

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