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Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
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Hubble-inspired Messier 1 - Intermediate processing steps

Revision title: After star reduction and final black level adjustments

Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
Powered byPixInsight

Hubble-inspired Messier 1 - Intermediate processing steps

Revision title: After star reduction and final black level adjustments

Equipment

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Acquisition details

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Description

Here are some step-by-step results on my recent M1 photo, as posted here https://www.astrobin.com/dsaojg

A: Integration of 36 x 10 min dual narrowband exposures in Ha/[OIII]. Basic light pollution removal and star color calibration in AstroPixelProcessor. See also: https://www.astrobin.com/hp5clp

B: Integration of 24 x 10 min dual narrowband exposures in [SII]/Hb. Basic light pollution removal and star color calibration in AstroPixelProcessor. 

C: Extracted Ha, [SII], [OIII], and Hb signals, light pollution processing only. Ha mapped to red-orange. [SII] mapped to yellow. [OIII] mapped to cyan. Hb mapped to teal. 

D: Recombination of separate narrowband channels in AstroPixelProcessor (using add-scale instead of multiply-scale). Inspired by the iconic NASA image and comparing where my narrowband components best matched theirs, I chose an Ha-S-O-Hb palette: 
  • Ha (red-orange): x1.25
    • (100,25,1)

  • [SII] (gold): x2.5
    • (100,100,1)

  • [OIII] (blue-green): x1
    • (1,50,100)

  • Hb (teal): x6
    • (1,100,100)

E: After application of BlurXTerminator (an AI deconvolution sharpening filter) in PixInsight

F: After application of NoiseXTerminator (an AI denoising filter) in PixInsight

G: After minor tweaks to black level and contrast curves in PhotoShop

H: After using StarXTerminator to separate and sharpen stars (simple method: reduce gamma).

Comments

Revisions

  • Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    Original
  • Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    B
  • Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    C
  • Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    D
  • Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    E
  • Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    F
  • Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    G
  • Final
    Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin
    H

B

Title: [SII]/Hb image stack

Uploaded: ...

C

Title: 4 separated narrowband colors, mapped to later colors

Uploaded: ...

D

Title: 4-color combination, prior to sharpening and touchup

Uploaded: ...

E

Title: After BlurXTerminator (AI deconvolution sharpening filter)

Uploaded: ...

F

Title: After NoiseXTerminator

Uploaded: ...

G

Title: After minor changes to black level and contrast curves in Photoshop

Uploaded: ...

H

Title: After star reduction and final black level adjustments

Uploaded: ...

Sky plot

Sky plot

Histogram

Hubble-inspired Messier 1 - Intermediate processing steps, Paul Macklin