how to find center of mass in each grid based on foreground pixels

i have an binary image B of size 100x100 and i divided into equal segments

where

   clc;
    clear all;
    close all;
    a = imread('i2eee.jpg');
    figure;imshow(a);

    % Normalizatoin

    b = imresize(a,[100,100]);
    figure;imshow(b);

    % Binarization
    th = graythresh(b);
    figure;imshow(th);

    a = im2bw(b,th);
    figure,imshow(a);
    s=0;
    x=1;z=1;
    w = 10;
    h = 10;
    c=100/w;
    r=100/h;
  a(r:c:end,:,:) = 0;
  a(:,r:c:end,:) = 0;
  figure;
  imshow(a);

Answer 1

[Image Analyst]

Use regionprops(). See my full Image Segmentation Tutorial in my File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

[Raghu Rao]

Thank you