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What is the difference between the roundness measurement and the circularity measurement?

calicchiatcalicchiat
in Image-Pro Plus General Discussions
What is the difference between the roundness measurement and the circularity measurement? 

Answers

  • YuriGYuriG
    Both measurements describe shape of the objects and how it's different from a perfect circle (1.0). The formulas for these measurements are shown in the tooltip:



    Yuri

  • calicchiatcalicchiat
    Thank you! If I'm trying to look at EMT morphology would one measurement be better to use than the other? When I did both measurements I got opposites trends in my data.
  • calicchiatcalicchiat
    edited June 2020
    Also, for roundness the farther the values deviate from one does that mean that they are not as perfectly round? And for the circularity measurement, I see that the value should be between 0 and 1 but is 1 indicating it being closer to a perfect circle?
  • YuriGYuriG
    Yes, the measurements have opposite trends, though for both 1 indicates a perfect circle. You can choose any of them for EMT measurements. Or just select both and see which one is better for classification. 

    Yuri
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