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Error Creating BPM and Masters  

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(@sjlan5)
Brown Dwarf Customer
Joined: 1 month ago
Posts: 7
January 27, 2021 18:25  

I have used APP for the first time today and I love it. I stacked 25 light frames of M42 and it turned out great, and today I tried using calibration frames with some new data too. However, about 40% through the calibration process, it ended saying there was an error creating BPM and a master. I can retry and take a screenshot of the error message if more detail is needed. Should I manually create a BPM first? If so then do I still add flat and dark frames? Help is appreciated. Thank you!

Clear skies


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(@wvreeven)
Galaxy Admin
Joined: 2 years ago
Posts: 597
January 27, 2021 18:39  

@sjlan5 Hi Tony,

A screenshot of the error message would help indeed. However, which calibration frames did you use? Were they taken with the same camera and software as the lights?

As for creating a BPM: there is no need to do this manually. APP will take care of this automatically if darks (and bias as well if you choose to use them) are loaded when processing the lights.


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(@sjlan5)
Brown Dwarf Customer
Joined: 1 month ago
Posts: 7
January 27, 2021 18:57  

@wvreeven Thanks for your reply. I used all calibration frames, flats, darks, dark flats, and bias. Also yes, same camera and software. I just started the calibration again, when the error message pops up I will attach a screenshot here.


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(@wvreeven)
Galaxy Admin
Joined: 2 years ago
Posts: 597
January 27, 2021 18:59  

@sjlan5 Just for me to understand this correctly: you are using the same calibration frames as you used for M42 and for M42 it worked but not for your subsequent target?


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(@sjlan5)
Brown Dwarf Customer
Joined: 1 month ago
Posts: 7
January 27, 2021 19:12  

@wvreeven I took the calibration frames with the light frames last night. Also, I attached the error message

Image 2021 01 27 at 1.09 PM

 


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(@wvreeven)
Galaxy Admin
Joined: 2 years ago
Posts: 597
January 27, 2021 19:16  

@sjlan5 I see in your screenshot that you have loaded JPG images as lights. Is that intentional? You should use the native camera format as much as possible. What camera did you use to shoot these images? Were the M42 files also JPG files? What happens if you try to integrate the lights without using any of the calibration frames?


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(@sjlan5)
Brown Dwarf Customer
Joined: 1 month ago
Posts: 7
January 27, 2021 19:20  

When I shot my light frames I simply uploaded them from my camera to my desktop and put them in a file. I shot the lights with a Nikon D5100, a little old but works great. I believe all the calibration frames and lights are JPG images, but it came out of my camera like that. I integrated the lights on their own without calibration frames and it turned out fine, I'll attach an image

BF8B1885 6E77 44BF B555 92A40C69A5DE

 M42 stacked without calibration frames

 


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(@wvreeven)
Galaxy Admin
Joined: 2 years ago
Posts: 597
January 27, 2021 19:40  

@sjlan5 Yes, the camera isn't the problem. But you really should make sure that the images are taken in the native NEF format of the camera. The fact that the images are JPG most likely are the cause of the issue. First of all JPG files are 8 bit. Secondly they are compressed. This both leads to loss of data which APP cannot recover from. The fact that it worked with the M 42 images is due to not using calibration frames.


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(@sjlan5)
Brown Dwarf Customer
Joined: 1 month ago
Posts: 7
January 27, 2021 19:48  

I see. I was shooting in fine quality setting on my camera and it says they are JPG images, and when I turn it to RAW it says NEF. So if I retry and shoot with RAW instead of fine it should fix it?


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(@wvreeven)
Galaxy Admin
Joined: 2 years ago
Posts: 597
January 27, 2021 21:35  

@sjlan5 That's correct. Shoot with RAW so you get NEF images and APP will take care of the rest.


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(@sjlan5)
Brown Dwarf Customer
Joined: 1 month ago
Posts: 7
January 28, 2021 14:21  

@wvreeven Awesome, thanks for the help


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