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    I have come across a definition of a term, uniformity which is
    "the sum of the square of the histogram bins value".

    I don't understand what this means. Please can someone explain what it means? thanks
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    (Original post by jsmith6131)
    I have come across a definition of a term, uniformity which is
    "the sum of the square of the histogram bins value".

    I don't understand what this means. Please can someone explain what it means? thanks
    Judging from the first few paragraphs of this wikipedia article I would interpret a 'bin value' as the number of things in the 'bin', which are the intervals, and you square that and sum it up. If this is misleading I shall delete my post.

    Edit: seems to be misleading.
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    (Original post by SeanFM)
    Judging from the first few paragraphs of this wikipedia article I would interpret a 'bin value' as the number of things in the 'bin', which are the intervals, and you square that and sum it up. If this is misleading I shall delete my post.
    well that's what I thought it meant but it didn't make much sense to me...but if you agree then I suppose thats good enugh
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    (Original post by jsmith6131)
    well that's what I thought it meant but it didn't make much sense to me...but if you agree then I suppose thats good enugh
    Does it make sense for the defintion/context?
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    (Original post by SeanFM)
    Does it make sense for the defintion/context?
    well the context is uniformity in images. If you consider the image in terms of its pixel values then you get a histogram. An image with 100 pixels of the same value should have a uniformity of 1. So I don't know how the definition fits...unless it is considering the probability value squred?
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    could it be talking about doing a chi squared test (of uniformity)?

    probably more context would help.
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    (Original post by jsmith6131)
    well the context is uniformity in images. If you consider the image in terms of its pixel values then you get a histogram. An image with 100 pixels of the same value should have a uniformity of 1. So I don't know how the definition fits...unless it is considering the probability value squred?
    Ah, I don't think what I said is correct then.
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    (Original post by Joinedup)
    could it be talking about doing a chi squared test (of uniformity)?

    probably more context would help.
    Here is a link to the original source

    https://books.google.co.uk/books?id=...20bins&f=false
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    (Original post by jsmith6131)
    Here is a link to the original source

    https://books.google.co.uk/books?id=...20bins&f=false
    sorry, still non the wiser really. I'd guess he's talking about some sort of edge detection algorithm that he's chosen to call 'uniformity' ?

    The text seems to have been translated into English quite crudely.
 
 
 
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