MATLAB Answers


Calculating area of a shape in an image

Asked by Ahmed
on 29 Dec 2011

How to calculate the actual area (in Cm^2) for an irregular shape in an image?? Please help me.



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2 Answers

Answer by Image Analyst
on 29 Dec 2011

You need to know the size of your image's total field of view, or an object of known size in the image, so that you can calculate a pixels/cm calibration factor. Then calculate area in pixels as usual (bwlabel, regionprops) and multiply by the square of the calibration factor.


Answer by Image Analyst
on 7 Jan 2012


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