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Mon traitement SHO

SHO
Hubble Palette Group •2 replies•246 views
De Vellis Leo avatar
De Vellis Leo avatar

Here's my SHO processing in PixInsight. I have limited experience with SHO and am learning using tutorials from the official PI website and others I found online. I just bought the Antlia ALP-T Ha & OIII and SII & Hb duo, but the bad weather has prevented me from fully exploring its uses yet. Thank you for sharing your opinions and helping me with any techniques for improvement.

Optolong L-Ultimate filter HII+OIII=120x180s ASKAR D2 filter SII+OIII=120x180

Preprocessing of both images with SPFC + SPCC + MGC Separation of RGB layers and recording of HOO and SOO

Integration of the 4 OIII images with Pixelmath, resulting in 3 SHO layers Preprocessing of the images with BlurX/NoiseX/MLT and histogram stretching

With LRGBC, I obtain a single SHO image (as in image ce). Another possibility with Pixelmath is to assign a percentage value to each layer.

SNCR and masking of the nebula, HDRMT/LHEqual/MLT, ColorSaturation, and CurvesTransformation

StarX and refinement of the narrowband layers. Normalization/median MT applied twice, then a star mask was created. Pixelmath formula used: ~((~starless)*(~stars))

The median MT reduced the number of stars, but also their brightness. In the star mask, I reworked it with CT (light) and CS (color).

I converted the final image to TIFF and worked with GIMP on color balance, hue saturation, and tones. Saved as JPEG.

đź“· SH2-124_Eneb2.jpegSH2-124_Eneb2.jpeg

Gordon Pegue avatar
Gordon Pegue avatar

I’m just a beginner myself but I must say that your effort here is very pleasing to look at. With 12 hours of data to work with, your result has crisp wispy details in the cloud complex and your stars have nice, tight shapes and good colors. I do think your H-alpha colors could stand to be a little bolder. For reference, check out @Mathias result on his Sh2-124 here Sh2-124 . He had almost 4 times as much data, especially in H-alpha. When I did my Shrimp Nebula image in SHO, I pulled up example Top Pick Nomination or Top Pick images of the object so I could “baseline” what my colors should be. The old adage “we stand on the shoulders of those who came before us” must definitely apply in the AP realms!! Good job!

De Vellis Leo avatar
De Vellis Leo avatar

Gordon Pegue · Jan 7, 2026, 05:08 PM

I’m just a beginner myself but I must say that your effort here is very pleasing to look at. With 12 hours of data to work with, your result has crisp wispy details in the cloud complex and your stars have nice, tight shapes and good colors. I do think your H-alpha colors could stand to be a little bolder. For reference, check out @Mathias result on his Sh2-124 here Sh2-124 . He had almost 4 times as much data, especially in H-alpha. When I did my Shrimp Nebula image in SHO, I pulled up example Top Pick Nomination or Top Pick images of the object so I could “baseline” what my colors should be. The old adage “we stand on the shoulders of those who came before us” must definitely apply in the AP realms!! Good job!

Thank you for your valuable advice, I will reprocess the image and try to increase the Ha signal at the next opportunity.

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