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Messier 101 revisited, Daniel.P
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Messier 101 revisited

Getting plate-solving status, please wait...
Messier 101 revisited, Daniel.P
Powered byPixInsight

Messier 101 revisited

Equipment

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Acquisition details

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Description

I have taken some Lum and Ha exposure with my APO and ASI1600mm set-up and combine them to 2015 single shot color exposure from 2105 (71x600" -15C bin 1x1 ).

The process was as follows in PI:

- I took the 2015 linear image (after integration and DBE)

- I Extract the CIE L*a*b channels

- I performed the usual preprocessing for the 2019 data to produce integrated linear image in L and Ha channels

- I did a weigheted integration of the L channel from 2015 data and Lum channel from the 2019 data using integration in PI

- I recombined channels in a collor image

- when NL for both the color image and the Ha image

- I slip the color image in RGB channels

- I add (with some weighting) the R and Ha channels

- I recombined the resulting RGB channels

- Green removal using SCNR

- Color Saturation with mask to protect background

- TGV noise removal

- Local Histogram Equalization

Final adjustement on iMac Photos

The 2 other versions are :

- D : did a masked strech instead of a pure Histo Transform

- E : using the full field of 2019 image, but not all the image is colored

Comments

Revisions

  • Final
    Messier 101 revisited, Daniel.P
    Original
  • Messier 101 revisited, Daniel.P
    D
  • Messier 101 revisited, Daniel.P
    E

D

Description: LHEq

Uploaded: ...

E

Description: Full Frame - only partialy colored

Uploaded: ...

Sky plot

Sky plot

Histogram

Messier 101 revisited, Daniel.P