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Another go at Shaprcap live, still no joy

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#1 skydivephil

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Posted 19 February 2018 - 04:40 PM

I had another go at trying live video stacking using Sharpcap live. 

But as far as i can see there is no increase in detail seen after the first frame.
Any ideas as to what is going wrong?
https://vimeo.com/256486394

the video is of the whirlpool galaxy taken in light pollutes skies. you should see 19  *30 second frames being stacked . 

Im using a celestron evolution 8 inch with hyperstar and a zwo 1600 colour camera. 


Edited by skydivephil, 19 February 2018 - 04:41 PM.


#2 barbarosa

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Posted 19 February 2018 - 05:12 PM

The link returns an error page.


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#3 skydivephil

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Posted 19 February 2018 - 05:39 PM

The link returns an error page.

Sorry should be fixed now 



#4 Robrj

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Posted 19 February 2018 - 05:47 PM

It looks like your black point is too far to the right.  It should be just before the large peak.


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#5 nic35

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Posted 19 February 2018 - 06:33 PM

It looks like your black point is too far to the right.  It should be just before the large peak.

+1 on this. 

 

Take a look at the last several pages of Astrojedi's unofficial quick start guide - https://www.cloudyni...al#entry8399976 post #46 for the link.  These pages  show where the black and white sliders are positioned for various objects.   

 

If you happened to have saved a 32 bit FITS image of your stack, you should be able to open it play with a FITS compatible program to adjust  the levels to pull out the details.  I think this works because the 32 bit stack is a raw dump of the camera's data, and not what you are seeing on the screen. I think.

 

j


Edited by nic35, 19 February 2018 - 06:40 PM.

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#6 skydivephil

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Posted 20 February 2018 - 04:35 AM

 

It looks like your black point is too far to the right.  It should be just before the large peak.

+1 on this. 

 

Take a look at the last several pages of Astrojedi's unofficial quick start guide - https://www.cloudyni...al#entry8399976 post #46 for the link.  These pages  show where the black and white sliders are positioned for various objects.   

 

If you happened to have saved a 32 bit FITS image of your stack, you should be able to open it play with a FITS compatible program to adjust  the levels to pull out the details.  I think this works because the 32 bit stack is a raw dump of the camera's data, and not what you are seeing on the screen. I think.

 

j

 

Thanks Ill take a look and see what happens next time we have a clear sky 



#7 Relativist

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Posted 21 February 2018 - 11:35 AM

I agree, you were clipping the image severely.

BTW live the video, we need more of those, what did you use to make it?


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