View Full Version here: : M42 high pass - comparison
05-12-2006, 06:21 PM
I've finally figured out high pass filtering... (i'm slow)
been experimenting with this a bit.
reprocessed my M42 withte meteor through it for fun.
unfortunately i also wanted to fix the core and because the less exposed frame i used had been centered differently from the main image i ended up having to crop the shot a bit.
nevertheless i'm happy with te improvement and I'll continue to practice the high pass filter technique
05-12-2006, 06:27 PM
That's a wicked image Frank!:eyepop: :thumbsup:
05-12-2006, 06:44 PM
05-12-2006, 06:45 PM
Dang that is a nice pic Frank!!! I love black nebula and yours shows up nicely.
05-12-2006, 07:35 PM
Thanks Al, Petra and Ken.
I was nervous about posting this at all because of the severe cropping I had to do at the top but thought it might be worthwhile to show the effect of the high pass filter
05-12-2006, 07:48 PM
That is simply superb.
The colours, detail and sense of 3D is breathtaking.
You just keep getting better and better.
Many salutes to you.
I'd love you to have another go for a slightly wider shot, using the same processing.
That's definite screen saver/wallpaper material.
05-12-2006, 08:07 PM
Wow Frank that is a great improvement.
I'm sure there are many like me out here who are wondering how we can manage to get an image like the first one much less the second. How about a blow by blow description of high pass filtering?
I think there's something already in Resources?
There's certainly been a few posts about high pass filtering.
I think Iceman may have contributed something along thse lines?
Have you bought the picture frame for it yet Frank? :)
05-12-2006, 09:09 PM
Very special image Frank.
well done mate.
05-12-2006, 10:02 PM
hey Thanks everyone.
I'm sure the High pass technique is better described elsewhere but here's what I basically did/do (remember I'm still just learning this stuff!)
presumably you've done the stacking and basic calibration etc to the point of having a picture you're pretty happy with (levels done/curves, saturation, etc)
duplicate your image
set the high pass to about 60 pixels (adjust to taste)
select all, copy
go back to your original (preferably a duplicate so you never damage the original)
open th elayers window
select soft light (or experiment with hard light)
slide the opacity (i select 30-100percent depending on the picture-experiment with it)
flatten the image/merge the layers
finalise unsharp mask etc as required and noise reduction process you usually use
hope this helps
Very nice Frank, the high pass filtering really brings it out wonderfully.
08-12-2006, 04:37 PM
arh frank, very nice comparison . a huge difference compared to the one without high pass. i like it :)
08-12-2006, 04:54 PM
Thansk guys, sorry for tardy reply i've been on the road for a few days
All of you AP guys here are AWESOME! I want to do this sort of stuff in the future! Fox.
vBulletin® v3.8.7, Copyright ©2000-2013, vBulletin Solutions, Inc.