Find area from a binary image

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Alina tom 2018-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/434288-find-area-from-a-binary-image

评论： Rik 2018-12-17

Hi All,

I want to calculate the Area of a region in binary image . i have used regionprops and bwarea to get the area of white region from the binary image but both of the function gives different values . i dont know how i can extract exact area from the image . please suggest me what should i have to use ?

i have attached the image as well

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Answer 1

Rik 2018-12-6

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I would expect you want to know the number of pixels in that blob. If that is the case, than you should use regionprops.

There is a note in the regionprops doc where it describes the area property: "Actual number of pixels in the region, returned as a scalar. (This value might differ slightly from the value returned by bwarea, which weights different patterns of pixels differently.)"

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Rik 2018-12-17

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