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Old 24-11-2012, 03:31 PM
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graham.hobart (Graham stevens)
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adding Ha to LRGB in Maxim

Can someone give me an idea of how I can stack my Ha data with my LRGB data in MaximDl?
I have tried to place the Ha with the red filter channel and it still stacks them separately.
I can't find a clear explanation on how to combine the data all together.
Cheers for your help.
Graham
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Old 24-11-2012, 04:32 PM
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pmrid (Peter)
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Quote:
Originally Posted by graham.hobart View Post
Can someone give me an idea of how I can stack my Ha data with my LRGB data in MaximDl?
I have tried to place the Ha with the red filter channel and it still stacks them separately.
I can't find a clear explanation on how to combine the data all together.
Cheers for your help.
Graham
One choice is to stack in DSS or some other program. DSS would certainly stack your L and Ha together if you tell it to.

Peter
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Old 24-11-2012, 09:49 PM
ericwbenson (Eric)
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I made a Maxim plugin that implements the Photoshop blending modes once upon a time. The equation used for each mode is displayed on the plugin dialog, see here for description of each:
http://www.simpelfilter.de/en/basics/mixmods.html

You can get the plugin here:
http://www.faintgalaxy.com/code.htm
I haven't tried it with recent v5 release so YMMV.

My processing log for M82 contains (see below for the whole mess!):
a comment about using Pin light PSBlend of the HAlpha data with the red channel (after doing a Split Triclor on the LRGB), then redoing a color combine of the B+G channels + blended R channel.
Although now in Maxim v5 you can recombine color channels obtained from Split Tricolor using the Color Stack dialog.

The very old result can be seen here:
http://www.faintgalaxy.com/ngc3034.htm

HTH


NGC3034_ProcessingLog.txt
BDF calibration with bad pixel map, F bias subtracted only
Align all (RGB and C) to best FWHM C frame 066C
Combine Sigma clip: 3 sigma, ignore black and pix>55K

RGB are 600s x 8 frames: 80 min per
C is 120s x 74 frames: 146 min
Ha is 530 min however the dome obscured the scope a fair amount (30% ?)


01X series
C FWHM=2.5"
CRGB Flatten bgd manual mode
C Double sized for LR
C LR 3 iterations with ~6 PSFs
C Half Sized
C FWHM=2.2"
CRGB Crop 50,20 x 1375,980

LR06-01X
C Double sized for LR
C LR 6 iterations with ~7 PSFs
C Half Sized
C FWHM=2.0"
Crop 50,20 x 1375,980
However the nebulosity at all intensity levels look the same.


Remove pedestal
B = 336.5
G = 574.0
R = 512.5
C = 565

LRGB combine
Lab, AutoBgd=on, Lw =100%, 1:1.03:1.25

DDP: Bgd=90, Mid=700, Filter=KPLM
Remove Bloom: 3 stars
Levels: RGB: gamma ~0.5, blue white point down ~10%
Remove bgd color: Threshold=5500, Feather = 10
Edit Pixels (-ep1 and -ep2): fixed left over from Remove bloom 2 brightest stars
Clone: Red enhanced version (115,110,105,102%) in halo around brightest star
Clone: GaussianBlur 1.5% (3 brightest star), 1.2% and 1% versions


01XHa
Aligned to -01XC
Combine Sigma clip: 3 sigma, ignore black and pix >55K, 19 frames used
Threw out frames:001-004,009, kept 4 x 20min + 15 x 30 min = 530min = 8.8hrs
Flatten Bgd manual mode
Crop 50,20 x 1375,980
Remove pedestal: Ha = 203
PSBlend: Pin light with R frame fbgd-crop-beq-rb-01XR

Split Tricolor: LR03-rb-LRGB-01X
Color combine RGB with 1:1:1 using PinLight frame for R
DDP: Bgd=90, Mid=400, Filter=none
UnsharpMask: KLPM, 75%
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