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  1. #1
    56jimalexander's Avatar
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    Default flat frame pixel information



    I can't get a screenshot to load (jpg less than 1M). I'll try to explain with just words.
    I'm wanting to know if a flat frame has the correct parameters.

    The info that is listed in the liberator file are:
    width, height, Min, Max, Mean, Meadian, StdDev, Peak level.
    Also, when I curser over the image I get a value for "input".

    Do these parameters give me what I need?

    I've been trying to grasp concepts like "ADU" but I can't get my head around it yet. Or rather, I can't figure If I actually need to know the math or if I can get away with using the Liberator data.

  2. #2
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    Default Re: flat frame pixel information

    Keeping this as simple as possible for you....
    The number you want is the mean or median. They should be much the same. I mention both because some tools provide only one or the other. I aim for a value around 20,000 out of a possible maximum 65000 but it can depend on the camera. You should be safe with that sort of value.
    ADU is just the units for the pixel values. The "input" number you saw is the value of the pixel in units of ADUs.

    At the moment the forum has a technical issue with uploads. Instead, upload to your favorite online drive (e.g. Dropbox, Google drive etc...) and you can link and/or embed the picture from there.
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  4. #3
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    Default Re: flat frame pixel information

    Thank you. Simple is good. I use an ATIK 11000. Didn’t know if maybe the wide format needed a different mean value.

 

 

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