how to calculate area region growing

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')

Answer 1

[KALYAN ACHARJYA]

B =A+J;

[mohd akmal masud]

not like that. i mean how to calculate the area region ?

[KALYAN ACHARJYA]

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]

yes sir KALYAN ACHARJYA, you also many helps me. thank you so much

Answer 2

[Image Analyst]

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:

Image Analyst's File Exchange

[mohd akmal masud]

tq image analyst. it work