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Messages - jkmorse

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16
Bug Reports / Problems in newly created Dark Masters
« on: 2018 February 05 16:01:25 »
Juan et al.,

Up until 2 years ago I had issues with the way MaximDL writes FITS files.  The problem was that it often truncated the image to only 32,000 bits instead of the normal 65,000; thereby trashing all of the higher end signal.  By working out the exact settings in MaximDL to avoid the problem, it went away. 

But lately it’s made a comeback of sorts.  RGB images are fine, so far, I am guessing because they have stars that fall into the upper range even before stretching.  But my narrowband images are a mess.  I can do a work around since the issue materializes when I calibrate my subs so if I skip calibration I can still use the files, but that is not ideal.

I have tracked the problem to some newly created master darks.  Something in the way PI is writing the master darks under 1.8.5 (at least since mid-January when I took the darksubs and made the masterdark) is reintroducing the problem.  Attached is a file including everything you should need to test the problem, including new and old master darks, other calibration frames, and new darksubs, as well as a set of 18 OIII subs:

https://www.dropbox.com/sh/q1bum458ba460tk/AABAlbPbOh03cRQU2xhWThJfa?dl=0

I am using the latest version of PI for Windows and an up to date Windows 10 computer.  Let me know if you need anything else.

Thanks,

Jim

17
General / Re: Calibration Issues
« on: 2018 January 17 15:24:30 »
I actually think your calibration turned out just fine.  Clearly the calibrated is far superior.  I think the calibration simply brought out hot pixels that were there all along.  To the extent hot pixels were added, it is much more likely to be coming from your masterdark, especially if your temp wasn't the same on both the dark and the main image.  Another issue may be that you used both the masterdark and the bias when calibrating.  Since your dark already has the bias built in, you do not need to include it when calibrating your main image.

Finally, even with the hot pixels you see, all of those can easily be dealt with using cosmic calibration and, ultimately, ImageIntegration.  And to repeat, I don't see much wrong with the calibrated image in the first place.

Hope that helps.

Jim

18
General / Re: Format output in image calibration
« on: 2017 December 16 18:39:30 »
Giulio,

Click on the "Edit" button on the top left, then click on "Global Preferences".  About 5 items down, you will find "File I/O Settings".  Click on it.  There, under "Default Save As image file extension" change the file type to ".xisf"

That should do it.

Best,

Jim

19
Release Information / Re: New in PixInsight 1.8.5: FrameAdaptation
« on: 2017 December 16 18:28:39 »
Thanks,

Will give that a shot and report back.  Could be a few days since I am well under way on a five panel mosaic of the Double Cluster.

Best,

Jim

20
Release Information / Re: New in PixInsight 1.8.5: FrameAdaptation
« on: 2017 December 13 10:57:47 »
Hey folks,

I have tried using LocalNormalization but am running into a consistent problem, namely dark halos around my bright stars.  I see nothing in the popup help that mentions ringing and am wondering if anybody has a suggestion where to start experimenting.

Thanks,

Jim

21
General / Re: Dark smudge on DBE image
« on: 2017 December 08 15:35:29 »
Adam,

Where is Godzilla when you need him?   :)

Jim

22
General / Re: Best way to use star mask
« on: 2017 November 02 17:37:59 »
Erik,

Books could be written on masking in PI.  If it helps, I have an 80 page workbook that has a large section on masks.  Also, if you haven't looked at it yet, Warran Keller's Inside PixInsight from Springer Press is a great resource.  Also, take a look at Harry's Astrobarn which is a great source for people new to PI.  If you are interested in my workbook, just drop me a line at jkmorse57@gmail.com and I will send it along.

Best,

Jim 


23
General / Re: DBE/ABE advice needed
« on: 2017 November 02 17:28:08 »
Hey and welcome,

DBE/ABE is not really changing your signal to noise ratio, its simply messing with how STF shows your image.  You can go in and reset STF by ctrl clicking on the little radiation symbol on STF and adjusting the sliders to get back to a better display.  If you are looking for more help, I have an 80 page workbook on most of the tools that I offer for free.  If you are interested, just drop me a note at jkmorse57@gmail.com

Best,

Jim

24
General / Re: PixInsight 1.8.5 - Was the SHO-AIP script removed?
« on: 2017 October 21 19:13:57 »
I went to each of those scripts and edited the file permissions and they now work again. Don't know why they came in with the necessary read permissions but its a simple fix

Chris,

For those of us who are not programmers, could you elaborate on exactly what to change re the file permissions.

Thanks,

Jim

25
Juan & Vicent,

I am just starting to scratch the surface on the new 1.8.5 tools, but this one is magical in its results.  I am going back to redo old processing projects and am amazed at the improvement generated by large-scale pixel rejection when I compare the old results with the new.  It just about eliminates the distracting blotchiness in my backgrounds and otherwise makes for a far cleaner image, with no discernable damage to good signal.  And the high and low rejection maps are things of beauty in showing the problem areas that have been fixed.

Just had to say thanks,

Jim

26
General / Re: New to PI - General guideline..
« on: 2017 October 02 14:26:28 »
Now I just have to catch up with all the 1.8.5 changes and issue Rev 42  :-\

27
General / Re: New to PI - General guideline..
« on: 2017 October 02 06:23:56 »
If you are interested, I have a 77 page PI workbook that I offer free for the asking.  Just drop me a line at jkmorse57@gmail.com and I will be happy to send along.

Best,

Jim

29
Image Processing Challenges / Can Local Normalization Fix This?
« on: 2017 September 28 14:52:22 »
Hey Folks,

See the images below.  As you can see from the blue integration, I had something really funky going on during image acquisition.  The problem has been solved but I hate to waste 18 hours of data.  You can see from my finished image that I did what I could with the standard PI tools, which was way better than I ever hoped I would be able to do.  But does Local Normalization offer me another means of attack.  Obviously, each of the subs is not as bad as the blue integration and in some files, mostly from my green filter, the problem doesn't exist so I have a workable reference frame.  My question is, how should I go about trying?

Thanks,

Jim

30
General / How do I . . . . ?
« on: 2017 September 25 09:34:58 »
Hey folks,

I have a small but irritating issue.  I am using a Dell UP3216Q workstation for my image processing but this has been an issue no matter what monitor I have used.  On the screen, when I open am image, the first size is too small to see details so I immediately zoom.  But the zoom takes the image from too small to just too big so it doesn't quite fit.  Its ok horizontally but is always just a bit too big vertically so I have to do a bit of scrolling to see the whole image.

Is there a way to adjust the settings so that I can make the zoom a hair smaller?

Thanks,

Jim 

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