IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P

IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus

IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P

IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus

Equipment

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Acquisition details

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Description

Multi star guided.

The version D is a quick test with only SHO channels.

It is interesting to note that after tricolor combination R=SII, G=Ha & B=OIII, I did an SCNR to remove green neutral, which had the effect of giving a good color for stars (no magenta).

This image show how small are the stars as compared to the RGB (slightly below 2 arcsec of FWHM).

Version F : RGB image : the Colo saturation was selectively applied to the stars using a NL light mask

The processing was done in PI as follow (version original):

For each R ,G ,V, Ha, OIII & SII channels :

- Flat Field Dark Substraction

- Flat Field Integration

- Images Calibration (Dark Substraction for RGBSHO and FF correction only for RGB (no need for SHO ...))

- Cosmetic Correction

- Image Registration

- Image Integration

- Noise Reduction (Demure) with 0.9 as variance

Using each integrated channel :

- Created RGB color image using channel combination

- Color balance on stars using a star mask

- Created RGBSHO image using NBLRGB combination tool

- Nonlinear Image Creation using NBRGB values

- Color balance on all image

- Perform SCNR (neutral 70%)

- Color saturation with boost in blue

- Color saturation with mask on star only

Final image adjustments performed in Iphoto on Imac (levels adjustments and deflip)

Comments

Revisions

  • IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P
    Original
  • IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P
    C
  • IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P
    D
  • IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P
    E
  • IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P
    F
  • Final
    IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P
    G

C

Description: With 50% mix of an HDRMultiscale image

Uploaded: ...

D

Description: Pure SHO quickly done

Uploaded: ...

E

Description: Ha channel

Uploaded: ...

F

Description: RGB image

Uploaded: ...

G

Description: Improved (I think) processing in 2019

Uploaded: ...

Histogram

IC1396 - RGB SHO - Elephant's Trunk Nebula in Cepheus, Daniel.P

In these public groups

ZWO ASI1600MM/QHY163M