elpajare
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home town/country: Girona-Spain
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Post by elpajare on Aug 10, 2017 16:19:03 GMT
I did not know anything of this program until last week. It seems a very powerful and COMPLICATED program to improve astro-photos, adding nothing but improving data existing in the picture. We will depart from a picture of NGC 6946 taken with bad conditions of sky. I do not know what will happen, I apologize for being a bad result..... This is the original shot without any processing and with a wide Histogram. No clipping. All parameters by default. 10x15" with Skywatcher 200/800+RisingTech IMX224 electronic fan-cooled+Risingsky
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elpajare
Member
Posts: 438
home town/country: Girona-Spain
time zone gmt +/-: 1
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Post by elpajare on Aug 10, 2017 19:33:59 GMT
With the short expositions we use in videoastronomy we do not capture the same details as with long exposures and object tracking. The results are not going to be the same, but do not give up making the most of our photos using simple tools. In this case I have used these that are quite simple to apply (and the only ones I know so far....) Histogram, Dynamic Background extraction, ACDNR, Curves and Screen Transfer Function.In total the process took about 10 minutes. And this has been the result: Surely with a better start photo the result would be better, but it is interesting to see the amount of detail that can be captured with our cameras and 15 "exposure.
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Post by ChrisV on Aug 10, 2017 22:29:51 GMT
Interesting. What's it look like processed with the Rising Tech stretching etc
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elpajare
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Posts: 438
home town/country: Girona-Spain
time zone gmt +/-: 1
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Post by elpajare on Aug 11, 2017 14:55:14 GMT
Worst
This specialized programs have tools for remove amp glow, vignetting and light pollution....and an exact color balance, among other things.
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Post by ChrisV on Aug 12, 2017 0:32:36 GMT
You could also look at astrotoaster. That will do these things on the fly - but much more basic than PI. Have a look at Howie's videos. I use it - astro shots captured with sharpcap, then monitor the folder where I save stacks with AT. Sharpcap does a great fast job on dark/flat subtraction and stacking but AT does a much nicer job on image colour etc.
Interesting to see what you say about PI though. I've been fumbling around with long exposure stuff and have been using startools. But others have been telling me to try PI.
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elpajare
Member
Posts: 438
home town/country: Girona-Spain
time zone gmt +/-: 1
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Post by elpajare on Aug 12, 2017 7:38:01 GMT
I just saw them and I'm impressed. Did not know the possibility of treating the images obtained with Sharpcap / RisingSky with Astrotoaster. Another thing I've learned. Thank you.
I did not know this software completely and I love having the opportunity to know new things. I agree with you that the camera image capture programs work to a limit; Capture the image, stack it and display it on the screen in the best possible way. But if we want to get the most out of it we will have to use specific programs like Pixinsight, Gimp, Startools and others. It is well to know them all and then choose the one that we like and work with. I am unable to know them all in depth.
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