Quote:
Originally Posted by jjjnettie
 That soothed the eyes alright. A wonderful capture Rick. |
Thanks, JJJ!
Quote:
Originally Posted by alocky
Love the detail in that, extremely sharp. Any chance you'd be willing to share the PixInsight wisdom more widely? Did you do any deconvolution on that image?
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Thanks, Andrew. I'm happy to share. My processing notes are included below. The "new trick" was to use a module that's under development, InterChannelCurves. It also crashed my session once, so be careful! I did use deconvolution.
Quote:
M31
Taken at Leyburn, 15 Sep, 2012
Objects in image:
M31, M110, NGC 206
Scope: Takahashi FSQ-106ED @ f/5, Atlas focuser
Mount: AP900
Camera: STL11K
Filters: Astrodon I series Gen 2 LRGB, Astrodon 3nm Ha
Guiding: Lodestar / FS-60CB
Image scale: 3.5 arcsec/pixel
Exposures: 9x300s Lum, 3x300s Red, 3x300s Green, 3x300s Blue
Conditions:
- Variable
Notes:
Processing...
Pixinsight:
- Calibrate (CosmeticCorrection - hot pixels, dark column).
- Register against "M 31-S002-R003-C001-Luminance.fts"
- Integrate R, G, B with parameter tweaks for best SNR
- Crop all
- eXcalibrator RGB ratios combine
eXcal adjusted: 0.7299 0.8605 1.0000
Xcal !adjusted: 0.6423 0.8142 1.0000
- extract Syn Lum from RGB
- integrate L/SynL for best SNR
Lum:
- DBE
- 30 iter deconvolution
- Masked nr with MMT
- stretch
- 8 layer HDRMT
- LHE
- MT star reduction
RGB:
- DBE
- MMT masked nr
- Stretch
- HDRMT
- Agressive nr
- Increase saturation
Combine:
- L(RGB) combine
- Mirror
- Tweak colour: InterChannelCurves ref Blue, target CIE Z and then CIE X
- Convert to sRGB
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