From: Al Kelly 
Sent: Thursday, June 20, 2002 6:35 PM

Subject: RE: [SBIG] Re: Processing philosphy,

Hi John,

I have attached a first-effort LRGB out of AIP4WIN with a mild faded minium 
filter touch-up and conversion to JPEG in PS.  The luminance was processed 
as follows:

Fast R-L Deconv, Blur = Gaussian, Rad = 2.2, NR = 0.8, Iter. = 5
Gamma scaled, Min = 307, Max =65534, Gamma = 1.4
DDP applied, Radius = 1.5, Sky = 244, Toe = 251, Shoulder = 22268
Linear scaled, Min = 480, Max =8500
Merged (60%/40%) with tangent histogram shaping (sigma spread=1.55, peak 
skew=.170) of the Fast R-L Deconv

The color was composited as I have previously described, with the luminance 
high end dropped to 60000 and the color saturation raised to 1.20 .  RGB 
high ends were left at 65535.  Oh, and I had Gaussian blurred (radius of 2) 
the RGB images.  This might not have been necessary, but I didn't like the 
sharpness of the color transitions in the nebula....just an esthetic 
choice, really.

I never use the G2V button, since it restretches the luminance.  If you've 
processed the luminance the way you like it to begin with, it should stay 
at 0-65535.  I ended up liking mine stretched a little more after I had 
saved it, which is why I went with 0-60000 on luminance in JOIN 
COLORS.  Your approach sounds basically reasonable, though, from the 
standpoint of retaining color balance and not saturating the color triads.

Al

p.s. I don't think my version is any better than the fine one you produced, 
but I thought you might want to see just what I would do.