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how to calculate area region growing

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Hi all, i use function region growing. my script as below. it work. but how to know the area of the growing?
i used regionprops but error pop up. anyone can help me?
note: the pixel value for my region is 1, and the rest is 0. i want to know the total area of 1 (in red circle).
clc
clear all
A = im2double(imread('medtest.png'));
figure, imshow(A);
J = regiongrowing(A);
figure,
B = imshow(A+J);
T = regionprops('table', B,'Area','Centroid')
ERROR!!!!
Error using regionprops
Expected input number 2, L, to be one of these types:
uint8, uint16, uint32, int8, int16, int32, single, double, categorical
Instead its type was matlab.graphics.primitive.Image.
Error in regionprops (line 235)
validateattributes(L, supportedTypes, supportedAttributes, ...
Error in rg (line 8)
T = regionprops('table', B,'Area','Centroid')

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Accepted Answer

KALYAN ACHARJYA
KALYAN ACHARJYA on 22 Jan 2021
B =A+J;

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mohd akmal masud
mohd akmal masud on 23 Jan 2021
not like that. i mean how to calculate the area region ?
KALYAN ACHARJYA
KALYAN ACHARJYA on 23 Jan 2021
I have answered about this? As you have already used regionprops functiom, I assumed that you can calculate the area.
"Error using regionprops
Expected input number 2, L, to be one of these types:"
If the problem is not resolved, why you accepted my answer, please unaccept it and accept the Image Analyst answer. Whatever Happy to know that the issue has been resolved.
:)
mohd akmal masud
mohd akmal masud on 23 Jan 2021
yes sir KALYAN ACHARJYA, you also many helps me. thank you so much

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More Answers (1)

Image Analyst
Image Analyst on 23 Jan 2021
You accepted an answer, so is it solved already?
If not, what is this regiongrowing() function you mentioned?
You should just be able to do
props = regionprops(binaryImage, 'Area');
allAreas = [props.Area];
where binaryImage is your segmented image. You can't pass regionprops() the handle to a graphical object. It must be an image, either binary or labeled. See my Image Segmentation Tutorial:

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