how can i prove that my radis of image is correct

Discussion in 'MATLAB' started by kowther alharbi, Mar 22, 2010.

  1. hey everybody ...

    i found centriod and drow a circle around the images cuz i want to found feature extraction of these images, the Q now How can i prove that radis is correct ?! btw the circle not exactly around the image )= coz that i think my radis is not correct !!

    Can Any One Help !!
    kowther alharbi, Mar 22, 2010
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  2. kowther alharbi

    ImageAnalyst Guest

    What radius (note my correct spelling)? How did you calculate
    radius? The radius you should probably be using is half the ECD
    (Equivalent Circular Diameter).

    ECD = sqrt(4 * Area / pi); % Diameter as if the blob were a circle of
    the same area.
    equivalentCircularRadius = ECD / 2.

    Or, perhaps it's not correct due to a typo or defective keyboard -
    just a thought.
    ImageAnalyst, Mar 22, 2010
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