Hello everyone,
Just wondering what settings folks use for the ImPPG brightness normalization setting for WL, Ha and CaK imaging. Or do you not use this feature at all?
Jordan
ImPPG Brightness Normalization
- Jordan Konisky
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ImPPG Brightness Normalization
Jordan -
SkyWatcher ED100 Refractor with Diamond Steeltrack Crawford Focuser
Celestron CG4 Equatorial Mount
Daystar Quark H-Alpha Chromosphere
Lunt CaK B1800 Filter Module
Lunt White Light Solar Wedge
ZWO ASI174MM, ZWOASI1600MM Cameras
SkyWatcher ED100 Refractor with Diamond Steeltrack Crawford Focuser
Celestron CG4 Equatorial Mount
Daystar Quark H-Alpha Chromosphere
Lunt CaK B1800 Filter Module
Lunt White Light Solar Wedge
ZWO ASI174MM, ZWOASI1600MM Cameras
- GreatAttractor
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Re: ImPPG Brightness Normalization
Hi Jordan,
I've added it to aid batch processing time lapses where the image brightness was slowly varying during capture, e.g. due to passing clouds, or just a sunset/sunrise as in this long lunar animation. (If you don't use batch processing, you can achieve the same normalization effect simply via tone curve adjustment.)
If you use it, I recommend setting the normalization range to 10%-90% or 20%-80%, as any subsequent sharpening usually expands the histogram.
Note that it won't work too well if the target's intrinsic brightness also changes, e.g. if a flare starts in an AR.
I've added it to aid batch processing time lapses where the image brightness was slowly varying during capture, e.g. due to passing clouds, or just a sunset/sunrise as in this long lunar animation. (If you don't use batch processing, you can achieve the same normalization effect simply via tone curve adjustment.)
If you use it, I recommend setting the normalization range to 10%-90% or 20%-80%, as any subsequent sharpening usually expands the histogram.
Note that it won't work too well if the target's intrinsic brightness also changes, e.g. if a flare starts in an AR.
- Jordan Konisky
- Im an EXPERT!
- Posts: 356
- Joined: Thu Apr 18, 2019 12:08 am
- Location: Verona, Wisconsin
- Has thanked: 386 times
- Been thanked: 270 times
Re: ImPPG Brightness Normalization
Thank you. Very helpful.
Jordan
Jordan
Jordan -
SkyWatcher ED100 Refractor with Diamond Steeltrack Crawford Focuser
Celestron CG4 Equatorial Mount
Daystar Quark H-Alpha Chromosphere
Lunt CaK B1800 Filter Module
Lunt White Light Solar Wedge
ZWO ASI174MM, ZWOASI1600MM Cameras
SkyWatcher ED100 Refractor with Diamond Steeltrack Crawford Focuser
Celestron CG4 Equatorial Mount
Daystar Quark H-Alpha Chromosphere
Lunt CaK B1800 Filter Module
Lunt White Light Solar Wedge
ZWO ASI174MM, ZWOASI1600MM Cameras