Non linear histogram scaling functions would be interesting.
eg. to correct galaxy center blowing
Non linear scaling function(s)
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Non linear scaling function(s)
Roel
Celestron Nexstar Evolution 8 - Celestron Nexstar 6 SE - StarSense
ZWO ASI533MC-Pro -- ZWO ASI533MM-Pro
Celestron Nexstar Evolution 8 - Celestron Nexstar 6 SE - StarSense
ZWO ASI533MC-Pro -- ZWO ASI533MM-Pro
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Re: Non linear scaling function(s)
Hi Roel,
it's always best to delay this sort of non-linear stuff until final processing to avoid data loss, but you can do it already for the display in SharpCap - two ways:
* Display gamma adjustment for general usage - http://docs.sharpcap.co.uk/2.9/#!2!Display%20Controls
* Live stacking gamma adjustment when stacking - http://docs.sharpcap.co.uk/2.9/#Histogram%20Tab
cheers,
Robin
it's always best to delay this sort of non-linear stuff until final processing to avoid data loss, but you can do it already for the display in SharpCap - two ways:
* Display gamma adjustment for general usage - http://docs.sharpcap.co.uk/2.9/#!2!Display%20Controls
* Live stacking gamma adjustment when stacking - http://docs.sharpcap.co.uk/2.9/#Histogram%20Tab
cheers,
Robin
Re: Non linear scaling function(s)
Thanks Robin, but up to now I wasn't able to correct very well the "blowout galaxy cores".
I tried also the gamma slider.
I also use Starlight Live software in conjunction with a Lodestar X2 Mono (CCD).
This software enables 2 non-linear scaling functions: ARCSINH and X^0.25, and works very well.
If you want more info I can submit some examples (linear compared to arcsinh).
I tried also the gamma slider.
I also use Starlight Live software in conjunction with a Lodestar X2 Mono (CCD).
This software enables 2 non-linear scaling functions: ARCSINH and X^0.25, and works very well.
If you want more info I can submit some examples (linear compared to arcsinh).
Roel
Celestron Nexstar Evolution 8 - Celestron Nexstar 6 SE - StarSense
ZWO ASI533MC-Pro -- ZWO ASI533MM-Pro
Celestron Nexstar Evolution 8 - Celestron Nexstar 6 SE - StarSense
ZWO ASI533MC-Pro -- ZWO ASI533MM-Pro
Re: Non linear scaling function(s)
Roel
Have a look at the last 2 bullet points at http://docs.sharpcap.co.uk/2.9/#Stretch ... ck%20Image for FITS Liberator and the tutorial link.
FITS Liberator offers the following comprehensive Scaling and stretch functions:
I have tried out all of the above functions on some of my deep sky images with some interesting results. The lessons learned have made me go back and experiment with different settings during capture.
Over the last few months, I have attended 4 astro-imaging workshops - 2 each by Gary Palmer and Damian Peach. Both of these drew a distinct line between data capture and data processing - they both grab data as one step and process it later as a second step.
Dave
Have a look at the last 2 bullet points at http://docs.sharpcap.co.uk/2.9/#Stretch ... ck%20Image for FITS Liberator and the tutorial link.
FITS Liberator offers the following comprehensive Scaling and stretch functions:
I have tried out all of the above functions on some of my deep sky images with some interesting results. The lessons learned have made me go back and experiment with different settings during capture.
Over the last few months, I have attended 4 astro-imaging workshops - 2 each by Gary Palmer and Damian Peach. Both of these drew a distinct line between data capture and data processing - they both grab data as one step and process it later as a second step.
Dave
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Re: Non linear scaling function(s)
Ah, ok, I have a Lodestar X2 now, so I will have a play with Starlight Live when I get some time and see what I can learn.
cheers,
Robin
cheers,
Robin