Area calculation

Hello. I would like an information about which mathematical method is used in the calculating of the area by the program Image J.
Thanks.

I would assume it could depend on which plugin you are using. However, the built-in methods and most plugins (from my experience) usually just count pixels. The result that is displayed may or may not be converted to a different unit. For instance, the area of a 13-by-13 px square would typically just be reported as 169. If the image’s metadata contains scale information, then some methods may report it in converted units. For example, if the metadata says that 1 px corresponds to 50 nm, it may also be reported as 8450 sq. nm.

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