How can I determine the area of the individual objects in my logical image within the Image Processing Toolbox 3.2 (R13)?

I am trying to determine the areas for each of the objects in my logical image. I have tried using the BWAREA function, but it returns the total area of all objects in the image, not the area of each object.

Answer 1

[MathWorks Support Team]

You can determine the area for individual objects by using a combination of the BWLABEL and REGIONPROPS functions.

First, you should use the BWLABEL function to return a label matrix. Each object in your original image will be assigned a different label value in the corresponding positions in the label matrix. For example, all positions with the value 1 in the label matrix correspond to a single object in your original image, all positions with the value 2 correspond to another object, etc. :

L_image = bwlabel(original_image);

After obtaining the label matrix, you can use the REGIONPROPS function to determine the area for each of the objects in the label matrix:

A = regionprops(L_image,'Area');