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Thread: Flat frames always come out black.

  1. #21
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    Default Re: Flat frames always come out black.



    all my flat frames are on my computer. I'm not sure if you can upload a raw image to the internet cause of it's size
    Scott
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    Default Re: Flat frames always come out black.

    Scott, RESIZE THE RAW DATA, convert from FITS to a format jpeg or png. Save the Raw always , just make a copy . Sure your going to lose data in the conversion but, that's the price we all pay .
    Last edited by stepping beyond; 07-26-2015 at 12:24 AM.
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    Default Re: Flat frames always come out black.

    Quote Originally Posted by jazzin View Post
    all my flat frames are on my computer. I'm not sure if you can upload a raw image to the internet cause of it's size
    We all use Dropbox to exchange large files. It allows you to share large files on the internet for free.

    Paul
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  4. #24
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    Default Re: Flat frames always come out black.

    Scott , I'm by far not an authority on this subject but, to me a flat frame is a flat frame weather stacked or not. It still should serve its purpose of cleaning up the field and stacking just makes a master of better quality removing artifacts like dust donuts and such.
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    Default Re: Flat frames always come out black.

    Yes, use dropbox or Google Drive. I can measure the average ADU of the frames that way. i can't do it off a .jpg.
    Stuart Forman


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    Default Re: Flat frames always come out black.

    here is the link to my google drive, where I uploaded my master flat

    https://drive.google.com/drive/my-drive
    Scott
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    Default Re: Flat frames always come out black.

    That link just goes to a local drive. What you have to do is go to your google drive, right click the file, click "Get link" copy it to your clip board, and then post that link.
    Stuart Forman


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    Default Re: Flat frames always come out black.

    Ok I think I got it now, here is the link

    https://drive.google.com/open?id=0B1...3c4Zk9uV01FMmc

    I opened the master flat tiff in google drive and the image looks gray with a bunch of doughnuts in it. Don't know if that is right or not
    Scott
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    Default Re: Flat frames always come out black.

    Quote Originally Posted by jazzin View Post
    Ok I think I got it now, here is the link

    https://drive.google.com/open?id=0B1...3c4Zk9uV01FMmc

    I opened the master flat tiff in google drive and the image looks gray with a bunch of doughnuts in it. Don't know if that is right or not
    You're close. You need to make the link public. I still can't access it. The doughnuts are probably normal. Those are your dust bunnies.
    Stuart Forman


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  10. #30
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    Default Re: Flat frames always come out black.

    when I get home I'll make it public. It image looks like a gray bullseye. I thought it is supposed to be a flat gray. It would look perfect if it weren't for the bullseye
    Scott
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