Search found 102 matches

by Rudi
07 Apr 2021, 07:56
Forum: Instrumentation
Topic: autofocusing noobie q
Replies: 5
Views: 113

Re: autofocusing noobie q

I do not usually autofocus for every image, but perhaps every 5 to 6. AutoFocus takes arround 30 seconds on my setup, so doing it every 120 sec image, would "waste" 25% observation time. Doing it every 6'th image, only 4% observation time is lost for focusing. I always let Astroart save focus pos an...
by Rudi
18 Mar 2021, 07:27
Forum: Scripts
Topic: Trying to quantify seeing/image-quality
Replies: 10
Views: 472

Re: Trying to quantify seeing/image-quality

Pascale,

If the star is elongated at an angle of 45°, 135°, 225° or 315°, then |sin alpha|=|cos alpha| and Astroart's x and y components are equal.
by Rudi
16 Mar 2021, 05:39
Forum: Scripts
Topic: Trying to quantify seeing/image-quality
Replies: 10
Views: 472

Re: Trying to quantify seeing/image-quality

Hi @pask, Thanks for the formula. That's a clever way to give one single value for an image. I have also been searching for such a formula. I wonder, if it is possible to get the "true" elongation with a script function, perhaps even also the angle? Not just the x and y components. If the elongation...
by Rudi
14 Mar 2021, 09:25
Forum: Scripts
Topic: Trying to quantify seeing/image-quality
Replies: 10
Views: 472

Re: Trying to quantify seeing/image-quality

Hi again Fabio, I am still using my analysis script, most recently on almost 600 images taken over several nights - it would be an almost impossible task to go through all images manually one by one. Here's the output put into an excel sheet, showing the background levels. I use this to quickly dete...
by Rudi
13 Mar 2021, 19:37
Forum: Image processing and analysis
Topic: Difficulties to remove subtle gradients
Replies: 2
Views: 131

Re: Difficulties to remove subtle gradients

Thanks Fabio. I wasn’t aware of the shörthcuts, that will definetly help. I will look forward to a dark UI though ;-)
by Rudi
13 Mar 2021, 07:38
Forum: Image processing and analysis
Topic: Difficulties to remove subtle gradients
Replies: 2
Views: 131

Difficulties to remove subtle gradients

Hi, Yesterday I was processing an image in Astroart, and when editing the image, I could not see, that there were a subtle gradient on the right side. I think, this is because Astroart is so bright, when viewing the full image. Then my (old) eyes cannot see the gradient in the dark image, it drowns ...
by Rudi
03 Mar 2021, 20:22
Forum: Image processing and analysis
Topic: Platesolve fails near celestial NP
Replies: 3
Views: 206

Re: Platesolve fails near celestial NP

Solves fine now with SP6 - thanks!
by Rudi
21 Feb 2021, 07:48
Forum: Scripts
Topic: Trying to quantify seeing/image-quality
Replies: 10
Views: 472

Re: Trying to quantify seeing/image-quality

Thanks Fabio. I’ll give that a try
by Rudi
20 Feb 2021, 15:59
Forum: Scripts
Topic: Trying to quantify seeing/image-quality
Replies: 10
Views: 472

Re: Trying to quantify seeing/image-quality

I need to be able to select only the best images for stacking in a simple way. For example, I had almost 300 lights from the previous weekend on the same target, and it is a cumbersome task to open and analyse one image at the time in AstroArt. There are some images that I need to discard, mainly du...
by Rudi
19 Feb 2021, 07:28
Forum: Scripts
Topic: Trying to quantify seeing/image-quality
Replies: 10
Views: 472

Re: Trying to quantify seeing/image-quality

I've updated the script a bit. 'Image resolution, seconds per pixel imageRes = 1.2 NStarsToFind = 1000 MAXPeakValue = 32000 folderName = "C:\Users\rbr\Dropbox\Main\astro\2021\0213\LBN777\" fileMask = "*?1?_L.fit" 'print column headers print "File; Filter; UTC; n_stars; FWHM; aspectratio; background;...